Intro to Thermal Energy

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

• Chemical
• Electrical
• Kinetic
• Nuclear

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Kinetic energy is the energy of ______.

• Motion
• Position
• Reaction
• Sound

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What happens to an object as its thermal energy increases?

• It heats up.
• It cools down.
• It doesn't change.
• It might freeze.

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

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

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Atoms have kinetic energy because they are always ______.

• exploding
• motionless
• reacting
• vibrating

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

• average
• maximum
• minimum
• total

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A substance might freeze when thermal energy is ______ the substance.

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

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

• constantly
• faster
• slower
• in circles

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Thermal energy always moves from a ______ area to a ______ area.

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

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

• absorbs
• consumes
• maintains
• releases

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