Question 1:

First, let's identify the states of matter in the pictures:

• X = Gas: The dots are far apart and floating everywhere.

• Y = Solid: The dots are tightly packed together in a neat pile.

• Z = Liquid: The dots are close together but not in a neat pile.

Answer: D. 'Z' shows a liquid and 'Y' shows a solid.

*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:

First, let's identify the states of matter in the pictures:

• X = Gas: The dots are far apart and floating everywhere.

• Y = Solid: The dots are tightly packed together in a neat pile.

• Z = Liquid: The dots are close together but not in a neat pile.

  
  Answer: B. X has the most energy (gas moves the fastest) and Y has the least energy (solid barely moves).

*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:

First, let's identify the states of matter in the pictures:

• X = Gas: The dots are far apart and floating everywhere.

• Y = Solid: The dots are tightly packed together in a neat pile.

• Z = Liquid: The dots are close together but not in a neat pile.

Answer: A. Z to Y. Freezing means turning from a liquid (Z) into a solid (Y).

*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:

The correct answer is:

C. solid

In a solid, the particles (atoms, ions, or molecules) are held in fixed positions within a rigid lattice structure. They cannot move freely from place to place, but they vibrate about their fixed positions due to thermal energy.

In contrast:

• Liquids – particles can move and slide past each other.

• Gases – particles move freely and rapidly in all directions.

• Solutions – particles are dispersed and move freely in the solvent.

*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 5:

The correct answer is:

B. water

Here's why:

• Water is a liquid. In a liquid, the particles are close together (tightly packed, but not in fixed positions) and can slowly move past each other, allowing the liquid to flow.

Brief check on the others:

• Steam – gas; particles are far apart and move very rapidly.

• Ice – solid; particles are close together but vibrate in fixed positions (they do not move past each other).

• Oxygen – at room temperature, it's a gas; particles are far apart and move freely.

So the substance where particles are close together and moving past each other is water.

*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 6:

The correct answer is:

C. further apart and moving faster.

Here's why:

• Molten wax is a liquid (melted solid).

• Compared to solid wax, the particles in molten wax have more energy, so they move faster.

• They are also further apart because the rigid structure of the solid has broken down, allowing particles to slide past one another.

So in molten wax:

• Further apart (than in the solid)

• Moving faster (due to higher thermal energy)

Thus, C is correct.

*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:

Molten iron → Solid iron
This is called freezing (or solidification).
It is the process where a liquid turns into a solid upon cooling.

*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:

This is called condensation.
It is the process where a gas (vapour) turns into a liquid upon cooling.

*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:

The correct answer is:

D. dissolving and diffusion

Here's why:

• Dissolving – The copper sulfate crystal breaks down into individual ions (Cu²⁺ and SO₄²⁻) and disperses evenly throughout the water. This is what causes the crystal to disappear.

• Diffusion – The dissolved ions spread out from areas of higher concentration (near the crystal) to lower concentration (throughout the water), resulting in the entire solution turning a uniform blue color.

Why the others are incorrect:

• Melting – This is a solid-to-liquid change caused by heat; not happening here (the crystal dissolves, it doesn't melt).

• Evaporation – This is liquid-to-gas change; not relevant to the crystal disappearing or the water turning blue.

So the two processes are dissolving and diffusion – D is correct.

*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:

Based on the description and diagrams provided, the correct answer is B. Air and bromine molecules move around randomly.

Explanation:
The process shown is called diffusion. It happens because gas particles are in constant, random motion. Even though bromine gas is denser than air, the random movement of the particles causes them to spread out and mix evenly throughout the available space over time. The brown color in the top jar is evidence that the bromine particles have moved upwards, while air particles have moved downwards to fill the space in the bottom jar.

*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.