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Unit 4A: Sources, Uses, And Properties Of Water
Test Description: Use this question set to help you practice for the Unit 4A test.
Instructions: Answer all questions to get your test result.
1) Which statement explains why water has such a high melting and boiling point?
A
Weak bonds connect the atoms in water molecules.
B
Strong attractions exist between water molecules.
C
Water is much more dense than air.
D
Water can exist as a gas at room temperature.
2) List the 3 phases of water in order from most to least dense.
A
gas, solid, liquid
B
gas, liquid, solid
C
solid, liquid, gas
D
liquid, solid, gas
3) Which statement about water is FALSE?
A
Water has a high boiling point.
B
The oxygen end of water has a partial negative charge.
C
Water molecules have ionic bonds.
D
Water molecules strongly attract each other.
4) Which of the following is not a PHYSICAL property of water?
A
The boiling point of water is 100 degrees C.
B
Water vapor reacts with sulfur dioxide in the atmosphere to make acid rain.
C
The melting point of water is 0 degrees C.
D
Water is a polar solvent.
5) What causes a bottle of soda to burst in the freezer?
A
The water in the bottle contracts when it freezes.
B
The bottle expands when it freezes.
C
The bottle contracts when it freezes.
D
The water in the bottle expands when it freezes.
6) What is the median value of the following set of numbers: 2, 4, 5, 7, 8, 10
A
6
B
7
C
8
D
5
7) Water-based solutions are called
A
compounds
B
acidic solutions
C
aqueous solutions
D
mixtures
8) Which pair forms a homogeneous mixture?
A
sugar and water
B
oil and vinegar
C
sand and water
D
oil and water
9) Solutions are always
A
aqueous
B
homogeneous
C
heterogeneous
D
colorless
10) Heterogeneous mixtures include
A
both colloids and suspensions
B
colloids only
C
suspensions only
D
solutions only
11) Which of the following is a solution?
A
vinegar
B
pure water
C
italian salad dressing
D
milk
12) A salt compound is added to pure alcohol. There is no settling and no Tyndall effect. It is most likely a(n)
A
suspension
B
element
C
solution
D
colloid
13) A sample is dark brown in color when shaken, but quickly settles out into 2 layers and shows the Tyndall effect. It is a
A
colloid
B
solution
C
suspension
D
compound
14) More than 97% of Earth's water is found in
A
groundwater
B
oceans
C
glaciers and ice caps
D
lakes and rivers
15) Most of Earth's freshwater is located in
A
groundwater
B
lakes and rivers
C
rainfall
D
glaciers and ice caps
16) Which is an example of direct water use?
A
the water used to flush a toilet
B
the water used to manufacture cars
C
the water used to make a piece of paper
D
the water it took to produce the meat in a hamburger
17) Which is an example of indirect water use?
A
It took 120 liters of water to make a 1.3 liter bottle of juice.
B
An old shower uses 19 liters of water per minute.
C
A family's water bill was $58.50 last month.
D
A water-saving toilet uses 1.28 gallons per flush.
18) Most of Earth's accessible freshwater, and the most common source for rural households, comes from
A
glaciers and ice caps
B
rivers and lakes
C
oceans
D
groundwater
19) Why is water considered a polar molecule?
A
because electrons are completely transferred from O to H
B
because H is much more electronegative than O
C
because O is much more electronegative than H
D
because electrons are completely transferred from H to O
20) Which of the following is NOT a heterogeneous mixture known as a colloid?
A
gelatin
B
paint
C
fog
D
milk
*select an answer for all questions
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