*7.8C Temperature and Kinetic Energy Quiz

What is the relationship between temperature and the kinetic energy of particles in a substance?

• As temperature increases, kinetic energy decreases.

• As temperature increases, kinetic energy increases.

• Temperature and kinetic energy are unrelated.

• As temperature decreases, kinetic energy increases.

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Which of the following best describes the effect of decreasing temperature on the particles of a substance?

• Particles move faster and spread apart.

• Particles move slower and come closer together.

• Particles remain at the same speed.

• Particles change their state of matter.

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TEKS.SCI.7.8C

If the temperature of a gas is increased, what happens to the average kinetic energy of its particles?

• It decreases.

• It remains constant.

• It increases.

• It becomes zero.

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Explain why a substance's state of matter can change when its temperature is altered.

• Because temperature changes the color of the substance.

• Because temperature affects the kinetic energy of the particles, leading to changes in their arrangement.

• Because temperature changes the chemical composition of the substance.

• Because temperature affects the gravitational pull on the particles.

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TEKS.SCI.7.8C

A student observes that when a liquid is heated, it eventually turns into a gas. Using your understanding of kinetic energy and temperature, explain this observation.

• Heating the liquid decreases the kinetic energy of its particles, causing it to turn into a gas.

• Heating the liquid increases the kinetic energy of its particles, allowing them to overcome intermolecular forces and become a gas.

• Heating the liquid has no effect on the kinetic energy of its particles.

• Heating the liquid changes its chemical structure, turning it into a gas.

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