Question 1:

From the images:

• X: particles widely spaced → gas

• Y: particles close together in a lattice structure → solid

• Z: particles close together but more randomly organised (not in a fixed lattice) → liquid

Therefore:

• Gas = X

• Liquid = Z

That matches option D.

*These A.I. responses have been individually checked to ensure they match the accepted answer, but explanations may still be incorrect. Responses may give guidance but the A.I. might not be able to answer the question! This is particularly the case for questions based on diagrams, which the A.I. typically cannot interpret.
Grade Gorilla uses Gemini, Deepseek and a range of other A.I. chatbots to generate the saved responses. Some answers have had human intervention for clarity or where the A.I. has not been able to answer the question.

Question 2:

We know from the earlier description:

• X = gas (particles widely spaced, most energetic) → hottest state

• Y = solid (particles in lattice, least energetic) → coldest state

• Z = liquid (in between)

So:
Hottest = X, Coldest = Y

That matches option B.

*These A.I. responses have been individually checked to ensure they match the accepted answer, but explanations may still be incorrect. Responses may give guidance but the A.I. might not be able to answer the question! This is particularly the case for questions based on diagrams, which the A.I. typically cannot interpret.
Grade Gorilla uses Gemini, Deepseek and a range of other A.I. chatbots to generate the saved responses. Some answers have had human intervention for clarity or where the A.I. has not been able to answer the question.

Question 3:

From the images:

• X (gas) → particles widely spaced, moving freely — not fixed in place.

• Y (solid) → particles in a lattice structure, vibrating about fixed points.

• Z (liquid) → particles close together but can move past each other — not fixed in place.

Only Y has particles held in place, vibrating about fixed points.

Correct answer: A. Y only.

*These A.I. responses have been individually checked to ensure they match the accepted answer, but explanations may still be incorrect. Responses may give guidance but the A.I. might not be able to answer the question! This is particularly the case for questions based on diagrams, which the A.I. typically cannot interpret.
Grade Gorilla uses Gemini, Deepseek and a range of other A.I. chatbots to generate the saved responses. Some answers have had human intervention for clarity or where the A.I. has not been able to answer the question.

Question 4-6:

Here are the correct terms for each change of state:

4. When liquid wax turns back into a solid → freezing (or solidification)

5. A gas turning back into a liquid → condensing

6. When frozen CO₂ (dry ice) turns directly to a gas → sublimating

*These A.I. responses have been individually checked to ensure they match the accepted answer, but explanations may still be incorrect. Responses may give guidance but the A.I. might not be able to answer the question! This is particularly the case for questions based on diagrams, which the A.I. typically cannot interpret.
Grade Gorilla uses Gemini, Deepseek and a range of other A.I. chatbots to generate the saved responses. Some answers have had human intervention for clarity or where the A.I. has not been able to answer the question.

Question 7:

Let’s think about heat transfer during state changes:

• Melting (solid → liquid) and boiling (liquid → gas) require energy input — heat is transferred to the substance from the surroundings.

• Freezing (liquid → solid) and condensing (gas → liquid) release energy — heat is transferred from the substance to the surroundings.

The question asks: heat energy being transferred from the substance changing state to the surroundings.

That happens during freezing and condensing.

Correct answer: C. freezing and condensing.

*These A.I. responses have been individually checked to ensure they match the accepted answer, but explanations may still be incorrect. Responses may give guidance but the A.I. might not be able to answer the question! This is particularly the case for questions based on diagrams, which the A.I. typically cannot interpret.
Grade Gorilla uses Gemini, Deepseek and a range of other A.I. chatbots to generate the saved responses. Some answers have had human intervention for clarity or where the A.I. has not been able to answer the question.

Question 8:

The force between particles is strongest in a solid (particles held tightly in a lattice), weaker in a liquid (particles still close but can move past each other), and weakest in a gas (particles far apart, negligible forces except during collisions).

So strongest to weakest: solid → liquid → gas.

Correct answer: C. solid, liquid, gas.

*These A.I. responses have been individually checked to ensure they match the accepted answer, but explanations may still be incorrect. Responses may give guidance but the A.I. might not be able to answer the question! This is particularly the case for questions based on diagrams, which the A.I. typically cannot interpret.
Grade Gorilla uses Gemini, Deepseek and a range of other A.I. chatbots to generate the saved responses. Some answers have had human intervention for clarity or where the A.I. has not been able to answer the question.

Question 9:

When a material (like a steel pipe) is heated and the particles move faster, increasing the spacing between them, the material gets larger in size.

This effect is called thermal expansion.

Correct answer: A. expansion.

*These A.I. responses have been individually checked to ensure they match the accepted answer, but explanations may still be incorrect. Responses may give guidance but the A.I. might not be able to answer the question! This is particularly the case for questions based on diagrams, which the A.I. typically cannot interpret.
Grade Gorilla uses Gemini, Deepseek and a range of other A.I. chatbots to generate the saved responses. Some answers have had human intervention for clarity or where the A.I. has not been able to answer the question.

Question 10:

The total mass of the steel will have remained constant.

Heating changes the state (solid → liquid) but does not change the number of particles or their total mass (assuming no particles escape).

*These A.I. responses have been individually checked to ensure they match the accepted answer, but explanations may still be incorrect. Responses may give guidance but the A.I. might not be able to answer the question! This is particularly the case for questions based on diagrams, which the A.I. typically cannot interpret.
Grade Gorilla uses Gemini, Deepseek and a range of other A.I. chatbots to generate the saved responses. Some answers have had human intervention for clarity or where the A.I. has not been able to answer the question.