WorksheetsWPS-6th Science Benchmark #10
Total questions: 13
Worksheet time: 1hrs 5mins
Name
Class
Date
1.
What are the three signs that a chemical reaction has taken place?
a)
color change, new substance, and energy release
b)
color change, odor change, melting
c)
evaporation, color change, new substance
d)
None of the above
2.
If a student tests a substance using the pH scale and its value is a 2, what is this substance considered?
a)
strong base
b)
weak base
c)
weak acid
d)
strong acid
3.
What is a substance with a pH of 7 most likely to be?
a)
water
b)
soda
c)
bleach
d)
ammonia
4.
If a substance has a pH of 8 or 9, what is it considered?
a)
strong acid
b)
weak acid
c)
strong base
d)
weak base
5.
What is the numerical range for bases on the pH scale?
a)
8-14
b)
7-14
c)
1-6
d)
4-9
6.
What color were strong acids on the pH scale?
a)
red
b)
yellow
c)
green
d)
blue
7.
What definition best describes a mixture?
a)
can always be separated using filtration
b)
has substances in it that are chemically combined
c)
two or more substance combined that can be easily separated
d)
none of the above
8.
What phase change occurs when a solid changes to a liquid?
a)
metling
b)
freezing
c)
evaporatin
d)
condensation
9.
What phase change occurs when a gas turns into a liquid?
a)
melting
b)
freezing
c)
evaporation
d)
condensation
10.
Name the four methods of separating a mixture.
a)
physical,magnetism,filtration,melting
b)
physical,magnetism,filtration,heal/boil
11.
Describe the best method to separate a salt water solution.
a)
Heat the water until it boils causing the water to evaporate. As the water evaporates the salt will crystalize
b)
Freez the water until it boils causing the water to evaporate. As the water evaporates the salt will crystalize
12.
Explain the difference between a solid, liquid, and a gas. Define each of them and give an example of each.
a)
Sold-definite shape a volume
Liquid-no shape, but volume
Gas-no shape, no volume
Liquid-no shape, but volume
Gas-no shape, no volume
b)
Sold-no shape, no volume
Liquid-no shape, but volume
Gas-definite shape a volume
Liquid-no shape, but volume
Gas-definite shape a volume
c)
Sold-no shape, but volume
Liquid-definite shape a volume
Gas-no shape, no volume
Liquid-definite shape a volume
Gas-no shape, no volume
13.
Name the paper used in our experiment to indicate whether or not the substance was an acid or a base.
a)
white paper
b)
litmus paper
c)
card stock paper
100 %
