Changes in Matter Study Guide

Thermal energy comes from the _________ energy of the atoms and molecules that make up the matter.

• nuclear
• kinetic
• chemical
• electrical

Kinetic energy is the energy of ________________.

• reaction
• sound
• position
• motion

What happens to an object as as its thermal energy increases?

• It might freeze
• It does not change
• It heats up
• It cools down

As kinetic energy of the molecules in a substance increases, the temperature ________________.

• decreases
• increases
• Atoms don't have kinetic energy
• stay the same

Atoms have kinetic energy because they always ___________.

• motionless
• vibrating
• exploding
• reacting

Temperature measures the _________ kinetic energy of the atoms in a substance.

• maximum
• total
• minimum
• average

A substance might freeze when thermal energy is _________ the substance

• created in
• added to
• destroyed in
• removed from

Removing thermal energy from a substance causes its atoms to vibrate ___________.

• faster
• slower
• constantly
• in circles

Thermal energy always moves from a ________ area to a _______ area.

• warmer, cooler
• colder, hotter
• bigger, smaller
• higher, lower

A chemical reaction that _______ energy can be used to heat up other substances.

• absorbs
• maintains
• consumes
• releases