When one kind of matter changes into another kind of matter with different properties.
100
Are the products of a chemical reaction on the left or right hand side of the equation?
On the right
100
If universal indicator turns red when testing a substance, what kind of substance is it?
It is an acid
100
What bacteria-killing substance did Alexander Fleming accidentally discover that became an important life-saving medicine?
What is penicillin.
200
What is the difference between a chemical change and a physical change?
A chemical change results when one kind of matter changes into a completely different kind of matter. In a physical change, the identity of the matter does not change.
200
What happens to matter during a chemical reaction?
Matter is conserved (neither created nor destroyed)
200
What should you do first before using chemicals at home?
Read the directions.
200
Identify two materials that result from chemical technology.
Nylon and plastic
300
What is an example of combustion?
a log burning in a fire
300
What is a combination reaction?
A reaction where elements or compounds come together to form new compounds.
300
What happens to limestone when acidic water flows across it?
Acidic water will dissolve the limestone
300
What is the capital of the United States of America?
Washington DC
400
List 2 examples of a chemical change.
rusting, pancakes cooking
400
What kind of reaction happens when two compounds split apart and the parts switch places?
a replacement reaction
400
A large molecule formed from smaller identical units is called a ______________.
polymer
400
How are treated and untreated rubber different?
Treated rubber does not dry or crack during cold weather or melt during warm weather.
500
When antacids are dropped in water, gas is released in the form of bubbles. How does the production of a gas indicate a chemical change?
Atoms or molecules forming the gas must come from somewhere-either the water or the antacid.
500
Name the three kinds of chemical reactions
decomposition, combination, and replacement
500
How do you spell Ms. J's full last name?
Janardhanan
500
Why is treated rubber more desirable?
Treated Rubber can be used in all climates year round for such items as automotive tires