Heating & Cooling Matter
This is anything that has mass and takes up space.
What is matter?
These are the three common states of matter.
What are solid, liquid, and gas?
This is when a substance changes from one state of matter to another due to heating or cooling.
What is a phase change?
This is the amount of matter in an object.
What is mass?
This happens to water when the temperature drops to 0°C and it turns into a solid.
What is freezing?
These are the tiny pieces that make up everything around us and are always moving.
What are particles?
This type of force helps hold molecules together or pull them apart.
What is an intermolecular force?
This happens to particles when a substance is heated, allowing it to change state.
What is they gain energy?
This is the amount of space something takes up.
What is volume?
This forms on the surface of lakes first when water begins to freeze.
What is ice?
When matter is heated, this happens to its particles.
What is they move faster?
These forces act like invisible magnets that pull particles closer together.
What are attractive forces?
This phase change happens when a gas turns into a liquid.
What is condensation?
During a phase change, this property may change depending on how particles are arranged.
What is volume?
This property of water explains why ice floats on top of liquid water.
What is ice is less dense than liquid water?
Adding this causes snow to melt into water.
What is energy?
When matter is heated, this happens to attractive forces between particles.
What is they weaken?
This phase change skips the liquid state and turns directly from solid to gas.
What is sublimation?
This scientific principle explains why the mass stays the same during a phase change.
What is the law of conservation of mass?
This is the role ice plays for aquatic life during winter.
What is an insulating or protective layer?
When matter is cooled, particles slow down and this happens to the space between them.
What is they get closer together?
When matter is cooled, particles slow down and get _________ & attractive forces get ___________.
On a cold winter day water vapor in the air contacts a very cold metal fence and freezes, this is an example of what kind of phase change?
When water changes from liquid to gas, its volume _________ and mass stays the same.
What is increases?
This structural feature is added to bridges to allow materials to expand and contract safely.
What are expansion joints?