Vocabulary
Chemical Changes
Chemical Reactions
Chemical Properties
Chemistry in our Lives
100

During a _________change the material keeps its identity.

physical 

100

When iron rusts this kind of change has occured. Chemical or Physical?

chemical

200
When a substance or kind of matter changes into another completely different kind of matter with different properties.
What is a chemical change.
200

The properties of the substances remain the same before and after the change. Is this physical or chemical change?

Physical

200
Elements or compounds come together to make or form new compounds.
What is a combination reaction?
200
Indicator paper is used to identify these two things
What are acids and bases?
200
What are two safety precautions to use when using chemicals at home.
What is carefully reading warning lables, read directions, gloves and goggles
300

A substance used in a reaction

reactant

300

Give 3 properties of chemical change.

irreversible change

properties of product are different from properties of reactants

new products are formed

300
Compounds split apart to make smaller compounds.
What is adecomposition reaction.
300
__________ acids and bases react more easily with materials than do __________ acids and bases.
What are strong, weak.
300
This polymer has been used in such items as nets, fabrics and ropes.
What is nylon
400

Chemical changes can be brought about by _____, ______, ___________ and ________.

heat, light, burning in oxygen, electricity

400
These are made as a result of a chemical reaction.
What are products?
400
In flame tests, different substances cause a flame to have different __________.
What are colors?
400
Gasoline, kerosene and diesel oil are seperated from petroleum or gas at a refinery?
What is petroleum
500

Give 2 examples of chemical changes in living organisms. In each example, give the products.

2 examples - photosynthesis and respiration

photosynthesis - products are glucose and oxygen 

respiration - products are carbon dioxide, water and energy

500
Matter cannot be _________ or ___________ during a chemical reaction.
What is created or destroyed?
500
When indicator paper turns red because of a substance, it has more of this.
What is acid?
500
Always read the ________ before using a chemical.
What are directions.
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