Vocabulary
Chemical Changes
Chemical Reactions
Chemical Properties
Chemistry in our Lives
100
During a _________change the material keeps its identity.
What is a physical change.
100
When iron rusts this kind of change has occured. Chemical or Physical
What is Chemical?
100
At least one molecule splits apart and the parts of the molecule switch places.
What is a replacement reaction?
100
Scientists use the chemical properties of _____________ to dissolve limestone surrounding fossils.
What is vinegar?
100
The substance Alexander Fleming discovered that became a life saving medicine.
What is Penicillin
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 formation of chemical bonds requires a change in this.
What is energy?
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
What is a reactant
300
Matter is changed into another matter with different ______ during a chemical change.
What is properties?
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
Shows what happens during a chemical reaction.
What is a chemical equation
400
The process of burning
What is combustion?
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
A large molecule made of many identifcal smaller units connected together.
What is a polymer.
500
A change in shape or phase of matter is this kind of change.
What is physical
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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