click below
click below
Normal Size Small Size show me how
PCP
Physical & Chemical Changes
Question | Answer |
---|---|
What is Chemical Reaction? | When 2 or more molecules change into a new substance. |
What is Chemical Change? | when 2 or more substances mix to form new substances. |
What is Unexpected Color Change? | New molecules in a chemical reaction radiate light differently producing new colors. |
What is Unexpected Temperature Change? | Energy is released or absorbed making surround ing objects hotter or colder. |
What is Cumbustion Burning? | A chemical reaction between substances, most of the time including oxygen and heat or light. |
What is Precipitates Form? | When a substance collects on another object, makes a solution cloudy |
What are Bubbles? | When gases produced in a chemical reaction are released |
What is Physical Change? | Changes the form or apperance of a substance It does not make a new substance. |
Cooking an egg | Chemical Change |
Melting ice | Physical Change |
Chopping an onion | Physical Change |
Iron rusting | Chemical Change |
Burning wood | Chemical Change |