Ontario Grade 9 Science Practice Exam 2026 – Complete Study Resource

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What happens to solid particles when heated?

They lose energy and become more rigid.

They gain energy and potentially change state to a liquid.

When solid particles are heated, they gain energy, which causes them to vibrate more intensely. As the temperature rises, these vibrations may become strong enough to overcome the forces holding the particles in their fixed positions, leading to a potential change in state from solid to liquid. This process is known as melting. The transition occurs when the particles have sufficient energy to break free from their rigid arrangement, allowing them to move more freely, which characterizes the liquid state. Thus, the correct understanding of the behavior of solid particles during heating directly aligns with this transformation process and the concept of energy transfer in matter.

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They remain in fixed positions regardless of heat.

They transform into a gas immediately.

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