Khoa học Lớp 5–6

Gr6 - L1 - Thermal Energy and Particle Motion WE DO

Chia sẻ bởi Amro Abdoun 1 giờ trước 10 Câu Được sử dụng 0 lần

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What is thermal energy?

A The amount of heat a substance can hold

B The total kinetic energy of all particles in a substance

C The average speed of particles in a substance

D The temperature of a substance measured in degrees Celsius

What happens to the particles in a substance when it is heated?

A They move slower and come closer together

B They stop moving completely

C They change into a different type of particle

D They move faster and spread apart

A student places a balloon in the freezer. After 10 minutes, the balloon looks smaller. What is the best explanation for this observation?

A The air particles inside the balloon turned into liquid.

B The air particles inside the balloon gained thermal energy and escaped through the balloon.

C The balloon material shrank because it got cold.

D The air particles inside the balloon lost thermal energy, moved slower, and moved closer together.

Which statement best compares temperature and thermal energy?

A Temperature depends on the number of particles, while thermal energy does not.

B Temperature measures the average kinetic energy of particles, while thermal energy is the total kinetic energy of all particles.

C Temperature is the total kinetic energy of particles, while thermal energy is the average kinetic energy.

D Temperature and thermal energy are the same thing.

When a substance is cooled, what happens to its particles?

A They lose kinetic energy and move slower.

B They gain thermal energy and move faster.

C They lose mass and become smaller.

D They gain kinetic energy and move faster.

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