# Science Visual Challenges: Teacher Key

Five separate challenge posters for each of grades 6, 7, and 8. These original classroom questions align with selected Texas science TEKS from the 2021 adoption, implemented in 2024–2025. They introduce or review parts of the cited expectations; they do not cover each expectation in full.

Source: [TEA: Science TEKS, Middle School](https://tea.texas.gov/laws-and-rules/sboe-rules-tac/sboe-tac-currently-effect/ch112b.pdf). Alignment checked October 3, 2026.

## Classroom routine

Give students a minute to choose independently. Ask them to explain their evidence to a partner, then discuss an alternative answer. Use the follow-up question to check whether they can apply the idea in a different situation.

Students can use: “I choose ___ because ___. The evidence is ___.”

Read printed numbers as the given data. Illustrations represent simplified scenarios, not scale drawings. For the acceleration challenge, treat the displayed masses as total moving system masses. For the closed-system mass challenge, use the ideal classroom model and disregard buoyancy and measurement effects.

## Grade 6

| Image | Challenge | TEKS | Answer |
|---|---|---|---|
| 01 | Which block will sink? | 6.6D | **C** |
| 02 | Which ball stores the most gravitational energy? | 6.8A | **B** |
| 03 | Which way will the canoe move? | 6.7C | **A** |
| 04 | Which rock formed from cooling lava? | 6.10C | **C** |
| 05 | Which pair shows mutualism? | 6.12B | **A** |

### 1. Which block will sink?

**Answer: C.** The solid block labeled 1.3 g/cm³ is denser than water and sinks; the other blocks are less dense than water.

**Follow-up:** What would change if the liquid had a density of 1.4 g/cm³?

### 2. Which ball stores the most gravitational energy?

**Answer: B.** With mass and gravity held constant, gravitational potential energy increases with height. B is highest at 4 m.

**Follow-up:** How could a lower ball store more energy than B?

### 3. Which way will the canoe move?

**Answer: A.** The paddle pushes water backward; the water simultaneously pushes the paddle and canoe forward. These interaction forces act on different objects.

**Follow-up:** Identify the two objects that exert the interaction forces.

### 4. Which rock formed from cooling lava?

**Answer: C.** Basalt is an igneous rock that can form when lava cools at Earth's surface. Sandstone and shale are sedimentary; marble is metamorphic.

**Follow-up:** What process could change sandstone into a metamorphic rock?

### 5. Which pair shows mutualism?

**Answer: A.** In this example, the bee obtains food and the flower receives pollination. The other scenes represent parasitism, predation, and a typical commensalism example.

**Follow-up:** Explain how mutualism differs from commensalism.

## Grade 7

| Image | Challenge | TEKS | Answer |
|---|---|---|---|
| 01 | Which sugar sample dissolves fastest? | 7.6E | **D** |
| 02 | Which rover has the greatest average speed? | 7.7A | **C** |
| 03 | Which handle warms fastest by conduction? | 7.8A | **A** |
| 04 | Which change helps protect the stream? | 7.11A | **B** |
| 05 | Which example shows artificial selection? | 7.13D | **A** |

### 1. Which sugar sample dissolves fastest?

**Answer: D.** For sugar under these conditions, warmer water, smaller pieces, and stirring each increase the rate of dissolving. D combines all three.

**Follow-up:** Design a fair test of temperature alone.

### 2. Which rover has the greatest average speed?

**Answer: C.** A averages 5 m/s, B 4 m/s, C 9 m/s, and D 6 m/s. C has the greatest average speed.

**Follow-up:** How far would C travel in 5 seconds at that average speed?

### 3. Which handle warms fastest by conduction?

**Answer: A.** Among these materials, copper conducts thermal energy most readily, so its handle warms fastest when size and conditions are matched.

**Follow-up:** Which material would you choose for a handle meant to stay cooler?

### 4. Which change helps protect the stream?

**Answer: B.** A vegetated buffer can slow runoff, trap sediment, and take up some nutrients before they reach the stream.

**Follow-up:** What evidence would show whether the buffer is helping?

### 5. Which example shows artificial selection?

**Answer: A.** The gardener chooses which plants reproduce based on a desired heritable trait. Human choice drives artificial selection.

**Follow-up:** Why must the selected trait be heritable for this process to work?

## Grade 8

| Image | Challenge | TEKS | Answer |
|---|---|---|---|
| 01 | What will the scale read after the reaction? | 8.6E | **B** |
| 02 | Which cart has the greatest acceleration? | 8.7A | **C** |
| 03 | Which wave can help reveal a bone fracture? | 8.8B | **D** |
| 04 | Which setting best supports a hurricane? | 8.10C | **B** |
| 05 | Where would primary succession begin? | 8.12B | **C** |

### 1. What will the scale read after the reaction?

**Answer: B.** The whole closed system remains 150 g. Gas formation and atom rearrangement do not change its total mass when nothing enters or leaves.

**Follow-up:** What could make the measured mass decrease in an open version of this setup?

### 2. Which cart has the greatest acceleration?

**Answer: C.** The accelerations are A 2 m/s², B 1 m/s², C 4 m/s², and D 2 m/s². C has the greatest net force per unit mass.

**Follow-up:** How would doubling C's mass change its acceleration at the same net force?

### 3. Which wave can help reveal a bone fracture?

**Answer: D.** X-rays penetrate soft tissue more readily than bone, creating contrast that can help reveal a fracture on a radiograph.

**Follow-up:** Name a different application of electromagnetic waves.

### 4. Which setting best supports a hurricane?

**Answer: B.** Warm ocean water supplies energy and moisture; moist air and weak wind shear help an organized tropical cyclone develop when other necessary conditions are present.

**Follow-up:** Why can strong wind shear disrupt a developing storm?

### 5. Where would primary succession begin?

**Answer: C.** Primary succession starts on a surface without developed soil, such as newly cooled lava. The other scenes retain soil and represent recovery or ongoing disturbance.

**Follow-up:** How would soil remaining after a fire affect recovery?

## Image production prompts

The posters were created with the built-in image-generation tool. Each prompt produced one independent image. The following prompts record the intended wording and conditions.

### g6-01-density

```text
Use case: scientific-educational. Create ONE independent high-resolution portrait classroom science challenge poster, about 4:5 aspect ratio, NOT a montage of posters. Match the attached tank puzzle's colorful polished dimensional realism: cyan blue atmosphere, big rounded yellow question banner, dark navy bold clean sans-serif question, highly readable text, colored letter circles with white letters. Replace its boastful wording with the exact classroom question supplied below. Compose ample space for four distinct choices labeled A red, B green, C purple, D orange; letters plus labels so color is not necessary. No answer reveal, no answer checks. Short exact text only. All text professional, typo-free, clean sans serif; no distorted decorative lettering. Accurate plausible illustration, clear objects, uncluttered layout, professional classroom appropriate; people if any fully clothed. Small top grade/TEKS chip. Footer navy strip reads 'Choose. Explain your evidence.' Do not include TCEA or any logo. A tiny scene illustration may support choices but do not make a mathematical data chart or scientific schematic.  Top chip text: 'GRADE 6 • TEKS 6.6D'. Exact large title: 'Which block will sink?'. Exact subtitle: 'Water density: 1.0 g/cm³. Each block is solid.'. Scene and exact choice text: Four equal-size solid glossy cubes suspended just ABOVE four identical clear containers of water, none touching water yet. The cubes use red, green, purple, orange in order left to right. A reads '0.6 g/cm³'; B '0.9 g/cm³'; C '1.3 g/cm³'; D '0.8 g/cm³'. Clear water line. The cubes must not look hollow. Bright polished science-lab illustration, no particle diagrams.
```

### g6-02-potential-energy

```text
Use case: scientific-educational. Create ONE independent high-resolution portrait classroom science challenge poster, about 4:5 aspect ratio, NOT a montage of posters. Match the attached tank puzzle's colorful polished dimensional realism: cyan blue atmosphere, big rounded yellow question banner, dark navy bold clean sans-serif question, highly readable text, colored letter circles with white letters. Replace its boastful wording with the exact classroom question supplied below. Compose ample space for four distinct choices labeled A red, B green, C purple, D orange; letters plus labels so color is not necessary. No answer reveal, no answer checks. Short exact text only. All text professional, typo-free, clean sans serif; no distorted decorative lettering. Accurate plausible illustration, clear objects, uncluttered layout, professional classroom appropriate; people if any fully clothed. Small top grade/TEKS chip. Footer navy strip reads 'Choose. Explain your evidence.' Do not include TCEA or any logo. A tiny scene illustration may support choices but do not make a mathematical data chart or scientific schematic.  Top chip text: 'GRADE 6 • TEKS 6.8A'. Exact large title: 'Which ball stores the most gravitational energy?'. Exact subtitle: 'Same mass: 1 kg. Measure height from the ground.'. Scene and exact choice text: Four identical balls at rest on separate narrow sturdy platforms above the SAME level ground. A red ball at height '1 m', B green at '4 m', C purple at '2 m', D orange at '3 m'. Order A B C D. B visibly tallest, D next, C next, A shortest. Platform bases share one ground level; labels large below each platform. Sunny outdoor school science setting. Do not show arrows or measuring diagrams.
```

### g6-03-force-pairs

```text
Use case: scientific-educational. Create ONE independent high-resolution portrait classroom science challenge poster, about 4:5 aspect ratio, NOT a montage of posters. Match the attached tank puzzle's colorful polished dimensional realism: cyan blue atmosphere, big rounded yellow question banner, dark navy bold clean sans-serif question, highly readable text, colored letter circles with white letters. Replace its boastful wording with the exact classroom question supplied below. Compose ample space for four distinct choices labeled A red, B green, C purple, D orange; letters plus labels so color is not necessary. No answer reveal, no answer checks. Short exact text only. All text professional, typo-free, clean sans serif; no distorted decorative lettering. Accurate plausible illustration, clear objects, uncluttered layout, professional classroom appropriate; people if any fully clothed. Small top grade/TEKS chip. Footer navy strip reads 'Choose. Explain your evidence.' Do not include TCEA or any logo. A tiny scene illustration may support choices but do not make a mathematical data chart or scientific schematic.  Top chip text: 'GRADE 6 • TEKS 6.7C'. Exact large title: 'Which way will the canoe move?'. Exact subtitle: 'From rest, the paddle pushes water backward.'. Scene and exact choice text: Dominant polished 3D scene of a canoe in a calm lake, its bow clearly pointing RIGHT, stern LEFT, fully clothed student wearing long-sleeve top, trousers, life jacket, holding a paddle pushing water LEFT behind the canoe. Paddle splash behind canoe to left. Show moment before movement, no speed lines. Below scene four equal answer panels with circle letters: A 'Forward'; B 'Backward'; C 'Stay still'; D 'Straight down'. No other choices, no correct answer markings, no direction arrows.
```

### g6-04-rock-cycle

```text
Use case: scientific-educational. Create ONE independent high-resolution portrait classroom science challenge poster, about 4:5 aspect ratio, NOT a montage of posters. Match the attached tank puzzle's colorful polished dimensional realism: cyan blue atmosphere, big rounded yellow question banner, dark navy bold clean sans-serif question, highly readable text, colored letter circles with white letters. Replace its boastful wording with the exact classroom question supplied below. Compose ample space for four distinct choices labeled A red, B green, C purple, D orange; letters plus labels so color is not necessary. No answer reveal, no answer checks. Short exact text only. All text professional, typo-free, clean sans serif; no distorted decorative lettering. Accurate plausible illustration, clear objects, uncluttered layout, professional classroom appropriate; people if any fully clothed. Small top grade/TEKS chip. Footer navy strip reads 'Choose. Explain your evidence.' Do not include TCEA or any logo. A tiny scene illustration may support choices but do not make a mathematical data chart or scientific schematic.  Top chip text: 'GRADE 6 • TEKS 6.10C'. Exact large title: 'Which rock formed from cooling lava?'. Exact subtitle: 'Look closely. Choose a rock and explain.'. Scene and exact choice text: Four museum-quality rock specimens large and distinct on individual display plinths, A 'Sandstone' tan gritty sand grains, B 'Marble' white with gray veins, C 'Basalt' dark fine-grained volcanic rock, D 'Shale' dark gray visibly thin layered sheets. Consistent photographic dimensional rendering, natural ground and blue sky behind, identical lighting. Large colored circles A B C D correspond left to right. Do not show lava behind the correct specimen, no answer clue or checks.
```

### g6-05-mutualism

```text
Use case: scientific-educational. Create ONE independent high-resolution portrait classroom science challenge poster, about 4:5 aspect ratio, NOT a montage of posters. Match the attached tank puzzle's colorful polished dimensional realism: cyan blue atmosphere, big rounded yellow question banner, dark navy bold clean sans-serif question, highly readable text, colored letter circles with white letters. Replace its boastful wording with the exact classroom question supplied below. Compose ample space for four distinct choices labeled A red, B green, C purple, D orange; letters plus labels so color is not necessary. No answer reveal, no answer checks. Short exact text only. All text professional, typo-free, clean sans serif; no distorted decorative lettering. Accurate plausible illustration, clear objects, uncluttered layout, professional classroom appropriate; people if any fully clothed. Small top grade/TEKS chip. Footer navy strip reads 'Choose. Explain your evidence.' Do not include TCEA or any logo. A tiny scene illustration may support choices but do not make a mathematical data chart or scientific schematic.  Top chip text: 'GRADE 6 • TEKS 6.12B'. Exact large title: 'Which pair shows mutualism?'. Exact subtitle: 'Choose the relationship that benefits both organisms.'. Scene and exact choice text: Four equally sized 3D natural-scene windows in a two by two layout. A bee collecting nectar and contacting pollen in a flower; label 'Bee + flower'. B tick on a fully furred deer's shoulder, small inset magnification to see tick; label 'Tick + deer'. C hawk observing a rabbit from a branch, no injury; label 'Hawk + rabbit'. D barnacles attached to whale skin, whale swimming underwater; label 'Barnacles + whale'. Each has large colored A B C D circle, four clear choices, no indicators of answer. Wholesome accurate animals.
```

### g7-01-dissolving

```text
Use case: scientific-educational. Create ONE independent high-resolution portrait classroom science challenge poster, about 4:5 aspect ratio, NOT a montage of posters. Match the attached tank puzzle's colorful polished dimensional realism: cyan blue atmosphere, big rounded yellow question banner, dark navy bold clean sans-serif question, highly readable text, colored letter circles with white letters. Replace its boastful wording with the exact classroom question supplied below. Compose ample space for four distinct choices labeled A red, B green, C purple, D orange; letters plus labels so color is not necessary. No answer reveal, no answer checks. Short exact text only. All text professional, typo-free, clean sans serif; no distorted decorative lettering. Accurate plausible illustration, clear objects, uncluttered layout, professional classroom appropriate; people if any fully clothed. Small top grade/TEKS chip. Footer navy strip reads 'Choose. Explain your evidence.' Do not include TCEA or any logo. A tiny scene illustration may support choices but do not make a mathematical data chart or scientific schematic.  Top chip text: 'GRADE 7 • TEKS 7.6E'. Exact large title: 'Which sugar sample dissolves fastest?'. Exact subtitle: 'Same sugar mass and water volume. All sugar can dissolve.'. Scene and exact choice text: Four equal clear beakers with equal water amounts and equal masses of sugar, illustrated as BEFORE experiments begin. Large labels on separate uncluttered panels. A one intact sugar cube: '20°C • Still'. B a crushed sugar cube as loose granular pile: '20°C • Still'. C intact sugar cube with stirring spoon: '40°C • Stirred'. D crushed sugar cube with stirring spoon: '40°C • Stirred'. Colored circle A B C D left to right. D loose sugar visibly crushed, not an intact cube. Scientific classroom 3D scene, no flames. No answer indicators.
```

### g7-02-average-speed

```text
Use case: scientific-educational. Create ONE independent high-resolution portrait classroom science challenge poster, about 4:5 aspect ratio, NOT a montage of posters. Match the attached tank puzzle's colorful polished dimensional realism: cyan blue atmosphere, big rounded yellow question banner, dark navy bold clean sans-serif question, highly readable text, colored letter circles with white letters. Replace its boastful wording with the exact classroom question supplied below. Compose ample space for four distinct choices labeled A red, B green, C purple, D orange; letters plus labels so color is not necessary. No answer reveal, no answer checks. Short exact text only. All text professional, typo-free, clean sans serif; no distorted decorative lettering. Accurate plausible illustration, clear objects, uncluttered layout, professional classroom appropriate; people if any fully clothed. Small top grade/TEKS chip. Footer navy strip reads 'Choose. Explain your evidence.' Do not include TCEA or any logo. A tiny scene illustration may support choices but do not make a mathematical data chart or scientific schematic.  Top chip text: 'GRADE 7 • TEKS 7.7A'. Exact large title: 'Which rover has the greatest average speed?'. Exact subtitle: 'Use distance ÷ time. All rovers travel straight.'. Scene and exact choice text: Four equal-size colorful miniature Mars rovers resting on separate terrain strips A red, B green, C purple, D orange. Separate crisp data plates: A '20 m in 4 s'; B '24 m in 6 s'; C '18 m in 2 s'; D '30 m in 5 s'. Mars landscape is atmospheric but not distracting. All four rovers same size, all displayed parked at same horizontal line, do not imply speed by position. Circle labels A B C D. No graphs or plotted data, no answers.
```

### g7-03-conduction

```text
Use case: scientific-educational. Create ONE independent high-resolution portrait classroom science challenge poster, about 4:5 aspect ratio, NOT a montage of posters. Match the attached tank puzzle's colorful polished dimensional realism: cyan blue atmosphere, big rounded yellow question banner, dark navy bold clean sans-serif question, highly readable text, colored letter circles with white letters. Replace its boastful wording with the exact classroom question supplied below. Compose ample space for four distinct choices labeled A red, B green, C purple, D orange; letters plus labels so color is not necessary. No answer reveal, no answer checks. Short exact text only. All text professional, typo-free, clean sans serif; no distorted decorative lettering. Accurate plausible illustration, clear objects, uncluttered layout, professional classroom appropriate; people if any fully clothed. Small top grade/TEKS chip. Footer navy strip reads 'Choose. Explain your evidence.' Do not include TCEA or any logo. A tiny scene illustration may support choices but do not make a mathematical data chart or scientific schematic.  Top chip text: 'GRADE 7 • TEKS 7.8A'. Exact large title: 'Which handle warms fastest by conduction?'. Exact subtitle: 'Same size and starting temperature. Same hot water.'. Scene and exact choice text: Four identical insulated mugs holding the same level hot water. One spoon in each: A copper metallic reddish brown, B wood, C nylon plastic, D stainless steel silver. All spoons have equal dimensions and same immersion depth, handles sticking out. Large labels 'Copper', 'Wood', 'Nylon', 'Stainless steel'. Colored A B C D circles red green purple orange. Subtle steam equal above each mug. Bright lab backdrop, no hands touching hot surfaces, no flames. No check marks or outcome clues.
```

### g7-04-watershed

```text
Use case: scientific-educational. Create ONE independent high-resolution portrait classroom science challenge poster, about 4:5 aspect ratio, NOT a montage of posters. Match the attached tank puzzle's colorful polished dimensional realism: cyan blue atmosphere, big rounded yellow question banner, dark navy bold clean sans-serif question, highly readable text, colored letter circles with white letters. Replace its boastful wording with the exact classroom question supplied below. Compose ample space for four distinct choices labeled A red, B green, C purple, D orange; letters plus labels so color is not necessary. No answer reveal, no answer checks. Short exact text only. All text professional, typo-free, clean sans serif; no distorted decorative lettering. Accurate plausible illustration, clear objects, uncluttered layout, professional classroom appropriate; people if any fully clothed. Small top grade/TEKS chip. Footer navy strip reads 'Choose. Explain your evidence.' Do not include TCEA or any logo. A tiny scene illustration may support choices but do not make a mathematical data chart or scientific schematic.  Top chip text: 'GRADE 7 • TEKS 7.11A'. Exact large title: 'Which change helps protect the stream?'. Exact subtitle: 'A farm needs to reduce fertilizer runoff.'. Scene and exact choice text: Dominant wide scene of a green farm beside a clean stream after light rain. Below, four equally sized illustrated choice panels. A paved strip beside stream, label 'Pave the stream bank'. B strip of dense native grass between crops and stream, label 'Plant a grass buffer'. C fertilizer spreader adding fertilizer to field near stream, label 'Add more fertilizer'. D bare exposed soil bank, label 'Remove bank plants'. Four colored circles A B C D, no answer ticks, no arrows or complex hydrological schematic. Beautiful outdoor dimensional rendering.
```

### g7-05-artificial-selection

```text
Use case: scientific-educational. Create ONE independent high-resolution portrait classroom science challenge poster, about 4:5 aspect ratio, NOT a montage of posters. Match the attached tank puzzle's colorful polished dimensional realism: cyan blue atmosphere, big rounded yellow question banner, dark navy bold clean sans-serif question, highly readable text, colored letter circles with white letters. Replace its boastful wording with the exact classroom question supplied below. Compose ample space for four distinct choices labeled A red, B green, C purple, D orange; letters plus labels so color is not necessary. No answer reveal, no answer checks. Short exact text only. All text professional, typo-free, clean sans serif; no distorted decorative lettering. Accurate plausible illustration, clear objects, uncluttered layout, professional classroom appropriate; people if any fully clothed. Small top grade/TEKS chip. Footer navy strip reads 'Choose. Explain your evidence.' Do not include TCEA or any logo. A tiny scene illustration may support choices but do not make a mathematical data chart or scientific schematic.  Top chip text: 'GRADE 7 • TEKS 7.13D'. Exact large title: 'Which example shows artificial selection?'. Exact subtitle: 'Choose the case where humans select inherited traits.'. Scene and exact choice text: Four equal 3D illustrated windows in two by two grid. A fully clothed gardener with long sleeves trousers selecting seed packets beside large ripe tomatoes, label 'Save seeds from large tomatoes'. B camouflaged moth resting on bark as bird looks from distance, label 'Moths avoid bird predators'. C deer in forest during cold weather, label 'Deer survive cold winters'. D wild finches feeding on seeds without people, label 'Finches find available seeds'. Colored large circles A B C D. Respectful fully clothed figures, no injury or death. No answer marked.
```

### g8-01-conservation-mass

```text
Use case: scientific-educational. Create ONE independent high-resolution portrait classroom science challenge poster, about 4:5 aspect ratio, NOT a montage of posters. Match the attached tank puzzle's colorful polished dimensional realism: cyan blue atmosphere, big rounded yellow question banner, dark navy bold clean sans-serif question, highly readable text, colored letter circles with white letters. Replace its boastful wording with the exact classroom question supplied below. Compose ample space for four distinct choices labeled A red, B green, C purple, D orange; letters plus labels so color is not necessary. No answer reveal, no answer checks. Short exact text only. All text professional, typo-free, clean sans serif; no distorted decorative lettering. Accurate plausible illustration, clear objects, uncluttered layout, professional classroom appropriate; people if any fully clothed. Small top grade/TEKS chip. Footer navy strip reads 'Choose. Explain your evidence.' Do not include TCEA or any logo. A tiny scene illustration may support choices but do not make a mathematical data chart or scientific schematic.  Top chip text: 'GRADE 8 • TEKS 8.6E'. Exact large title: 'What will the scale read after the reaction?'. Exact subtitle: 'The sealed system stays closed. Nothing escapes.'. Scene and exact choice text: One huge central laboratory illustration: sealed glass bottle with vinegar and baking soda reacting and inflating a flexible balloon tightly attached to bottle mouth, ENTIRE bottle plus balloon supported on one digital scale. Safe modest inflation, no explosions. Small BEFORE inset upper left shows same bottle with substances separate and uninflated balloon on scale display '150 g'. Main AFTER scale display is a large '?' to conceal answer. Lower answer row A '140 g', B '150 g', C '160 g', D '170 g'. Main balloon keeps gas inside sealed system. No separate unweighed materials, no leakage, no answer markings.
```

### g8-02-acceleration

```text
Use case: scientific-educational. Create ONE independent high-resolution portrait classroom science challenge poster, about 4:5 aspect ratio, NOT a montage of posters. Match the attached tank puzzle's colorful polished dimensional realism: cyan blue atmosphere, big rounded yellow question banner, dark navy bold clean sans-serif question, highly readable text, colored letter circles with white letters. Replace its boastful wording with the exact classroom question supplied below. Compose ample space for four distinct choices labeled A red, B green, C purple, D orange; letters plus labels so color is not necessary. No answer reveal, no answer checks. Short exact text only. All text professional, typo-free, clean sans serif; no distorted decorative lettering. Accurate plausible illustration, clear objects, uncluttered layout, professional classroom appropriate; people if any fully clothed. Small top grade/TEKS chip. Footer navy strip reads 'Choose. Explain your evidence.' Do not include TCEA or any logo. A tiny scene illustration may support choices but do not make a mathematical data chart or scientific schematic.  Top chip text: 'GRADE 8 • TEKS 8.7A'. Exact large title: 'Which cart has the greatest acceleration?'. Exact subtitle: 'Use acceleration = net force ÷ mass.'. Scene and exact choice text: Four identical-format little wheeled laboratory carts on a smooth flat surface, A red B green C purple D orange. Show mass via solid blocks, avoid motion arrows. Four large readable data panels: A '2 kg • Net force: 4 N'; B '4 kg • Net force: 4 N'; C '2 kg • Net force: 8 N'; D '4 kg • Net force: 8 N'. All data values are net forces, not applied forces. C not visibly moving faster, all carts pictured initially at rest. Crisp 3D rendering. No graphs, no answers.
```

### g8-03-electromagnetic-waves

```text
Use case: scientific-educational. Create ONE independent high-resolution portrait classroom science challenge poster, about 4:5 aspect ratio, NOT a montage of posters. Match the attached tank puzzle's colorful polished dimensional realism: cyan blue atmosphere, big rounded yellow question banner, dark navy bold clean sans-serif question, highly readable text, colored letter circles with white letters. Replace its boastful wording with the exact classroom question supplied below. Compose ample space for four distinct choices labeled A red, B green, C purple, D orange; letters plus labels so color is not necessary. No answer reveal, no answer checks. Short exact text only. All text professional, typo-free, clean sans serif; no distorted decorative lettering. Accurate plausible illustration, clear objects, uncluttered layout, professional classroom appropriate; people if any fully clothed. Small top grade/TEKS chip. Footer navy strip reads 'Choose. Explain your evidence.' Do not include TCEA or any logo. A tiny scene illustration may support choices but do not make a mathematical data chart or scientific schematic.  Top chip text: 'GRADE 8 • TEKS 8.8B'. Exact large title: 'Which wave can help reveal a bone fracture?'. Exact subtitle: 'Match the wave to its medical use.'. Scene and exact choice text: Central respectful clinical image of a fully clothed patient with covered arm being positioned by fully clothed healthcare professional in scrubs at a radiography station; no exposed torso, no actual X-ray result shown, no bones/diagrams to generate. Four answer panels below with beautiful illustrative objects: A radio and tower labeled 'Radio waves'; B television remote labeled 'Infrared'; C glowing lamp labeled 'Visible light'; D radiography tube housing labeled 'X-rays'. Four colored circles A B C D. No answer marked, no hazardous experimentation.
```

### g8-04-hurricane

```text
Use case: scientific-educational. Create ONE independent high-resolution portrait classroom science challenge poster, about 4:5 aspect ratio, NOT a montage of posters. Match the attached tank puzzle's colorful polished dimensional realism: cyan blue atmosphere, big rounded yellow question banner, dark navy bold clean sans-serif question, highly readable text, colored letter circles with white letters. Replace its boastful wording with the exact classroom question supplied below. Compose ample space for four distinct choices labeled A red, B green, C purple, D orange; letters plus labels so color is not necessary. No answer reveal, no answer checks. Short exact text only. All text professional, typo-free, clean sans serif; no distorted decorative lettering. Accurate plausible illustration, clear objects, uncluttered layout, professional classroom appropriate; people if any fully clothed. Small top grade/TEKS chip. Footer navy strip reads 'Choose. Explain your evidence.' Do not include TCEA or any logo. A tiny scene illustration may support choices but do not make a mathematical data chart or scientific schematic.  Top chip text: 'GRADE 8 • TEKS 8.10C'. Exact large title: 'Which setting best supports a hurricane?'. Exact subtitle: 'Assume other storm-forming conditions are favorable.'. Scene and exact choice text: Four equally sized tropical ocean scene windows, A B C D in two by two layout, no actual hurricanes yet. Equal unobstructed horizons, slight clouds without indicating correct choice. Large data boxes exact: A 'Cool water • Dry air • Strong wind shear'; B 'Warm water • Moist air • Weak wind shear'; C 'Warm water • Dry air • Strong wind shear'; D 'Cool water • Moist air • Weak wind shear'. Circle colors red green purple orange. Warm/cool water should remain blue, no literal boiling or flames. No diagram arrows, no answers. Ensure readable multiline text.
```

### g8-05-succession

```text
Use case: scientific-educational. Create ONE independent high-resolution portrait classroom science challenge poster, about 4:5 aspect ratio, NOT a montage of posters. Match the attached tank puzzle's colorful polished dimensional realism: cyan blue atmosphere, big rounded yellow question banner, dark navy bold clean sans-serif question, highly readable text, colored letter circles with white letters. Replace its boastful wording with the exact classroom question supplied below. Compose ample space for four distinct choices labeled A red, B green, C purple, D orange; letters plus labels so color is not necessary. No answer reveal, no answer checks. Short exact text only. All text professional, typo-free, clean sans serif; no distorted decorative lettering. Accurate plausible illustration, clear objects, uncluttered layout, professional classroom appropriate; people if any fully clothed. Small top grade/TEKS chip. Footer navy strip reads 'Choose. Explain your evidence.' Do not include TCEA or any logo. A tiny scene illustration may support choices but do not make a mathematical data chart or scientific schematic.  Top chip text: 'GRADE 8 • TEKS 8.12B'. Exact large title: 'Where would primary succession begin?'. Exact subtitle: 'Look for a new surface with no developed soil.'. Scene and exact choice text: Four equal landscape windows in two by two layout: A abandoned farm with intact brown soil, a few weeds and fence; label 'Abandoned field'. B recently burned forest with charred standing trunks and intact soil, no active fire; label 'Burned forest'. C fresh fully cooled solid dark lava rock barren with no plants, no soil, no molten lava; label 'New bare lava rock'. D mowed lawn with visible soil and short living grass; label 'Mowed lawn'. Four colored large circles A B C D, no correct choice mark. Beautiful but accurately differentiated terrestrial natural scenes.
```