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Anos 5–6
Gr6 - L1 - Thermal Energy and Particle Motion WE DO
Compartilhado por Amro Abdoun
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1
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
2
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
3
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.
4
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.
5
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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