1
What is the freezing point of water in Celsius and Fahrenheit?
0C
32F
What is the boiling point of water in Celsius and Fahrenheit?
100C
212F
What metal is the Statue of Liberty made from?
Copper
What is a change in the physical properties of matter?
Physical change
List three physical properties of matter.
Texture, shape, size, color, and volume
What is it called when a liquid becomes a gas?
Evaporation
What is it called when a gas goes to a liquid?
Condensation
How can you tell the difference between a gold ring and a copper ring?
A copper ring will turn your skin green after a while.
Give three examples of physical changes.
Tearing, crushing, freezing, melting, boiling, evaporation, and condensation
Give three examples of chemical changes
List three signals that a chemical change has occurred.
Gas forms, Heat is given off, a solid forms or disappears, a new color occurs, a new odor, and light is produced.
What is a change in matter where a new substance is created?
Chemical change
What three things are needed for a fire to burn?
Oxygen, heat, and a fuel source
Is Mentos in Cola a physical or a chemical change when the CO2 is released?
The CO2 was already in the soda, it is a physical change.
What is needed for rusting to occur? List three things
Iron, water, and oxygen
Explain why burning is a chemical change.
When you burn something it turns into ash. That ash cannot be transferred back into what the original substance is
What metal is needed for rust to form?
Iron
What happens when milk sours?
The bacteria in the milk start eating the sugars from the milk causing the bacteria to grow
Explain how cooking can be a physical change and a chemical change
The thing you are cooking may still be the same substance. This makes it a physical change. When cooking there is heat given off to make it a chemical change
What states in the United States often have bad wild fires? List three
Oregon, Washington, and Califonia