When a substance goes from a liquid to a solid, it is called __________________.
Freezing
100
What is the phase change when a substance goes from a solid to a liquid?
Melting
100
How could you change solid chocolate to a chocolate sauce to pour over your ice cream?
Add heat
100
What is created when two materials are combined such as gravel and sand?
Mixture
100
The sun heats wet clothing hung on a clothesline in the midday sun. What effect will this have?
The water will evaporate and the clothes will dry.
200
What is the phase change called when a substance goes from a gas to a liquid?
Condensation
200
What would happen to a puddle of water when the sun comes out?
It may evaporate
200
What are the three phases of matter found on Earth?
Solid, Liquid, and Gas
200
What tool could I use to separate a mixture made up of iron filings and Cheerios?
Magnet
200
Liquid water placed in a tray turned to ice. What caused this to happen?
Heat was taken away (it was cooled).
300
What happens to the particles in a substance when heat is taken away?
The particles move more slowly
300
What happens to the particles in a substance when heat is added to it?
The particles begin to move faster
300
What phase of matter keeps its own shape?
Solid
300
True or False:
A substance that goes into a mixture will change and become a completely new substance when it is combined together with another substance.
False
300
If you fold a sheet of paper to make a paper airplane, do you make new matter?
EXPLAIN YOUR ANSWER!
No, because the airplane is still the same type of matter, or paper, that you started with.
400
How could you cause a liquid to become a solid?
Take away heat and cause it to freeze
400
Water may be present in all three phases. In which phase would water molecules be moving the fastest?
Gas (water vapor)
400
What phase of matter takes the shape of the container but KEEPS its own volume?
Liquid
400
A mixture is made with salt and water.
What is a way to separate the salt from the water?
add heat and cause the water to evaporate
400
Why would it be necessary to use a tool to separate a mixture instead of your hands?
A tool is useful when some pieces are very small or there are solids and liquids together.
500
What is the freezing point of water (Fahrenheit?)
32 degrees
500
What is the boiling point of water (Celcius)?
100 degrees
500
What phase of matter takes the shape of its container and takes the volume of the container (filling the entire container)?
Gas
500
True or False:
A mixture can be separated without changing the substances in it.