Energy and Matter Practice Test

Do the terms thermal energy and temperature refer to the same idea?

• Yes, both mean the same thing.

• No, temperature is only one of the factors that determines thermal energy

• Yes, they both describe particle speed.

• No, temperature measures only the total energy.

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The total energy in a substance is affected by:

• Only how fast the particles are moving

• Only the temperature

• The number of particles and their motion

• The shape of the particles

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What usually happens to most substances when they are cooled?

• They expand

• They shrink

• They always freeze

• Nothing changes

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How does radiation transfer energy?

• Through solid contact

• By particle collisions

• By light or electromagnetic waves

• Through air pressure changes

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How does energy move within a closed system?

• From receiver to source

• In random directions

• From cooler to warmer objects

• From the energy source to the object gaining energy

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Temperature is best described as:

• Total energy of all the particles

• Energy from gravity

• Average speed (kinetic energy) of particles

• Energy stored in molecules

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Why does food coloring mix faster in hot water than cold water?

• The color dissolves better in warm liquids

• Particles in hot water move faster

• Cold water pushes the color away

• Water pressure increases diffusion

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What happens to kinetic energy when a substance heats up?

• It decreases

• It stays constant

• It increases

• It evaporates

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What is particle motion like at absolute zero?

• They spin very fast

• They stop moving

• They vibrate more

• They explode

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Why can you smell perfume across a room after it is sprayed?

• The scent gets stronger over time

• The particles explode

• The particles move from high to low concentration areas

• Air currents push them away