Physical Changes
What is a physical change?
A change in appearance or state that does not form a new substance.
A change where a new substance is formed.
What is the law of conservation of matter?
Matter cannot be created or destroyed.
Is folding paper a chemical or physical change?
Physical
Give an example of a physical change.
Ice melting into water.
What evidence suggests a chemical change?
Gas release, energy release, or a formation of a new substance.
Why does the weight of an orange stay constant after it's peeled?
The mass remains the same because no matter is lost.
What type of change occurs when metal rusts?
Chemical
Does the mass of matter change during a physical change?
No, the mass stays the same.
What happens when wood burns?
A chemical reaction forms new substances.
There is a chemical reaction happening inside of a sealed balloon. Would the mass stay the same after the chemical reaction?
Yes, the mass of the matter stays the same even if the matter changes form.
Is boiling water a chemical or physical change?
Physical
Describe the state of this matter after mixed: red and blue beads mixed in a bowl.
The beads mix, but their properties do not change. It is a mixture.
Why can't you separate chemicals in a glow stick after they are mixed?
A chemical change forms a new substance.
When water boils, why does the mass stay the same if the vapor is collected?
The water converts into vapor, but the total mass does not change.
What happens when you mix baking soda and vinegar?
A chemical change releases gas and forms new substances.