Name that phase change
Solid to liquid
What is melting?
If an ice cube is melting, is energy being added (red) or removed (blue)?
What is added
A metal fork is a good example of this.
What is a conductor?
If an eraser is too soft, it will have this problem.
What is "it will be used up too fast"?
A combination of two or more things where each keeps its own properties.
What is a mixture?
Liquid to solid
What is freezing
To cause condensation, for example, water vapor turning to dew on grass, you must do this to the gas
What is remove?
Is rubber an example of a conductor or an insulator?
What is an insulator?
This property means an eraser can bend without breaking.
What is flexible?
A special mixture where one substance dissolves evenly into another.
What is a solution?
Liquid to gas
When water evaporates from a puddle, this is what happens to the energy of the water molecules.
What is add/gain energy
If a material is good at transferring heat, it is called this.
What is a conductor?
If an eraser is flexible, it will do this with movement
What is bend enough/too much?
Powdered sugar dissolving in water forms one of these.
What is a solution?
Gas to liquid
Rain puddle drying up in the sun
What is add energy?
To keep a candy bar from melting, you should wrap it in one of these two materials.
1. cloth
2. copper wire
3. plastic
4. metal
An engineer must consider these characteristics of a material when designing a solution.
What are properties?
Is trail mix an example of a mixture or solution?
What is a mixture?
The original state of matter before melting occurs
What is a solid
This phase change, which turns a liquid to a solid, requires energy to be removed.
What is freezing?
Copper wire is used in circuits because it is an excellent conductor of this.
What is electricity?
What would happen to a sheet of paper if the eraser was too rough?
a. The paper will be dark.
b. The paper will have marks on it still.
c. The eraser would put a hole in the paper.
What is C.
If you let the water in a sugar-water solution evaporate, this is what will be left behind.
What is sugar?