Name: ___________________________________ Period:___ Date:______
Dekalb Reads Assignment 2.3B
Physical and chemical change
Read pages 58-60 and answer the questions
What kind of material should be used for making false teeth?
Which material satisfies the requirements for false teeth?
What was the material of George Washington’s false teeth?
What is the advantage of surgical steel?
Why is water turned to steam?
Why is liquid gasoline changed into gas?
What are the compounds produced when gasoline burns in Oxygen?
What kind of change is burning gasoline?
Define chemical change.
When does a battery die?
What happens to the oxygen you inhale?
What happens actually when the food you eat is digested?
What do get when water is broken down?
Name the law that applies to all chemical changes.
How can you learn the chemical properties of a substance?
Define physical change.
What is the chemical formula of Quartz?
What kind of change is converting Quartz crystals to sand?
Are Quartz and sand chemically same or different?
What kind of change is grinding peanut to peanut butter?
What kind of changes are melting, freezing, and evaporation?
What kind of change is dissolving sugar into water?
Why does sugar disappear on dissolving?