Pretest 6: Heat &Temperature

What average energy of particles does temperature measure?

• kinetic

• potential

• chemical

• mechanical

What happens to the temperature of an object when the particles are moving faster?

• reduces

• increases

• remains constant

• increases then reduces

Do all particles of the substance at a certain temperature move at the same speed and in the same direction?

• No

• Yes

• Maybe

• None of the above

Does the temperature of a substance depend on how much of the substance is present?

• No

• Yes

• Maybe

• None of the above

When a substance undergoes thermal expansion, its _________.

• mass increases

• volume decreases

• particles get colder

• particles spread out

All substances will expand equally with the same change in temperature.

• True

• False

• Neither

• Either true or false

Which of the following is NOT a unit of temperature?

• Calorie

• Celsius

• Fahrenheit

• Kelvin

The decrease in temperature of a substance indicates that _______.

• the number of particles in it decreases

• the average velocity of its particles increases

• the average velocity of its particles increases

• the average kinetic energy of its particles decreases

The normal body temperature is 37ºC. What is this in Fahrenheit?

• 32 ºF

• 99 ºF

• 212 ºF

• 373 ºF

Which of the following happens when ice changes into a liquid at 0ºC?

• The molecules move slower than before

• The temperature of the substance increases.

• The potential energy of the molecules increases.

• The average movement of the molecules increases.