Study Guide For Science Test

Kinetic energy and phase change investigations test

Kinetic Energy

Energy related to particle motion. Thermal Energy is a type of this.

Changing kinetic/thermal energy

Causes particles to expand/contract and change the motion of particles.

Fast particles

Have more kinetic energy

Slow particles

Contain less kinetic energy

High temperature

More kinetic energy (faster particles)

Low temperature

Less kinetic energy (slower particles)

Expansion

When Kinetic energy/heat is added so particles spread out/expand

Contraction

When kinetic energy is removed, making particles come closer together and slow down.

Phase change

When there is a change from one state of matter.

Freezing point

A substance's _____ is the temperature where it transitions from a liquid to a solid.

Melting point

A substance's _____ is the temperature at which it transitions from solid to liquid.

Boiling Point

A substance's ____ is the temperature at which it quickly transforms from a liquid to a gas.

Evaporation

When liquid turns into gas.

Condensation

When gas turns into a liquid.

Melting

When a solid turns into a liquid.

Freezing

When a liquid turns into a solid.

Sublimation

when a solid turns into a gas.

Deposition

When a gas turns into a solid.

The cause of energy transfer

Whether something freezes or melts, changing their motion too

Freezing

I put water in my ice cube tray when I take it out of the freezer it is frozen.  What phase change is this?

Melting

I had a bar of chocolate and forgot I put it in my backpack.  My backpack was in the sun all day, and when I took the bar of chocolate out it was liquidy.  What phase change is this?

Condensation

 On a cold day, I woke up to water droplets on my window. The gas in the air had turned into water. What phase change is this?

Deposition

 One morning I walked outside and my car had frost on it.  However, it didn't rain last night… What is the phase change?

Sublimation

I did a science lab on dry ice.  The ice, turned into gas when pushed on the table.  What phase change is this?

Evaporation

I left a cup of water on my bedside table during the night and when I woke up the water level had gone down from the night before.  What phase change is this?

True or false- particles stop moving once they reach thermal equilibrium

False 😑

Equals average kinetic energy

temperature