changes of state

How does thermal energy play a role in particle motion and changes of state?

• Thermal energy is a term that refers to temperature

• Increasing an object's thermal energy increases particle motion and can cause a change of state.

• Decreasing an object's thermal energy increases particle motion and can cause a change of state.

• Thermal energy is the energy added from a heat source.

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Condensation occurs when...

• Liquid is condensed into a solid.

• Water vapor becomes snow at high altitudes.

• As a liquid is heated to boiling.

• Vapor is cooled on a surface.

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An example of sublimation is..

• Dry ice turning into CO2

• Water Freezing

• Dry ice turning into H2O

• Lava erupting from a volcano

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Pressure effects changes of states because...

• Particles confined to a smaller space can move less freely.

• Particles are unable to change states under immense pressure.

• Particles confined to a smaller space are able to change state with less thermal energy.

• Pressure increases the thermal energy of particles.

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NGSS.MS-PS1-4

Taking energy away from a substance will make its particles move

• more slowly
• more quickly
• at the same speed

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When a gas forms directly from a solid, skipping the liquid phase. it is called

• deposition
• sublimation
• evaporation
• condensation

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The change from a gas to a liquid is called 

• condensation
• evaporation
• sublimation
• deposition

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The change in state from liquid to gas is called

• vaporization

• sublimation

• condensation

• deposition

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In which state of matter are particles moving the slowest?

• solid
• liquid
• gas
• gummy bears

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NGSS.MS-PS1-4

The state that matter exists in depends on its 

• volume 
• weight
• temperature 
• mass

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