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WorksheetsChapter 12 Science Study Guide
Total questions: 16
Worksheet time: 8mins
Name
Class
Date
1.
Look at the chemical equation below:
C + O2 --------> CO2
Carbon oxygen carbon dioxide
What is the product?
C + O2 --------> CO2
Carbon oxygen carbon dioxide
What is the product?
a)
carbon
b)
oxygen
c)
dioxide
d)
carbon dioxide
2.
Which of the following describes what happens during a chemical reaction?
a)
matter is destroyed
b)
matter is not changed
c)
matter is created and destroyed
d)
matter is neither created nor destroyed
3.
What kind of chemical reaction is shown here?
a)
reduction
b)
replacement
c)
combination
d)
decomposition
4.
A scientist used a universal indicator paper to test an unknown substance. The indicator paper turned RED. The substance is a ___________.
a)
weak acid
b)
weak base
c)
strong acid
d)
strong base
5.
Alexander Fleming accidentally discovered a bacteria killing substance called _________________________.
a)
insulin
b)
aspirin
c)
vitamins
d)
penicillin
6.
A tent could be made out of a chemical polymer that was developed in a laboratory. _______________________ is the name of the polymer.
a)
silk
b)
wool
c)
nylon
d)
cotton
7.
What should you do first before using chemicals at home?
a)
read the directions
b)
put on safety googles
c)
ask a friend what to do
d)
wear a long shirt
8.
A ________________________ reaction occurs when two compounds split apart and the parts switch places.
a)
reduction
b)
replacement
c)
combination
d)
decomposition
9.
A ____________________ happens when one substance changes into another substance.
a)
chemical change
b)
physical change
c)
strong acid
d)
reduction
10.
A substance that is changed in a chemical reaction is called a ___________________________.
a)
product
b)
atom
c)
reactant
d)
physical change
11.
When objects change by tearing, crushing or melting, a _____________________ has occurred.
a)
chemical change
b)
reduction
c)
physical change
d)
replacement
12.
The process of burning is called _______.
a)
physical change
b)
combustion
c)
conservation
d)
evaporation
13.
A substance that forms during a chemical reaction is called a _________________________________.
a)
product
b)
reactant
c)
chemical
d)
physical
14.
A special sentence that describes what happens in a chemical reaction is called a __________________________.
a)
reduction
b)
decomposition
c)
evaporation
d)
chemical equation
15.
A chemical change is when one kind of matter changes into _________________________.
a)
different phases
b)
different shape
c)
different volume
d)
another kind of matter with different properties
16.
Which of the following is combustion?
a)
a log burning
b)
a dry sponge expanding
c)
a piece of metal turning to rust
d)
a container of mild souring
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