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Properties Of Water
Test Description: Properties of Water
Instructions: Answer all questions to get your test result.
1) What is a surfactant?
A
Anything that weakens hydrogen bonds, decreasing surface tension.
B
Water sticking to water
C
The uneven sharing of electrons that creates a slightly positive and negative side.
D
Raindrops forming round beads when they fall on a window
2) Which of the following statements best describes a polar molecule?
A
The uneven sharing of electrons that creates a slightly positive and negative side.
B
It has an overall negative charge.
C
The even sharing of electrons.
D
It has an overall positive charge.
3) Describe the structure of water.
A
H2O; Two positive hydrogen atoms and one negative oxygen atom
B
H2O; Two positive oxygen atoms and one negative hydrogen atom.
C
H2O; Two negative hydrogen atoms and one positive oxygen atom
D
H2O; Two positive hydrogen atoms and one positive oxygen atom
4) Water droplets sticking to the surface of the glass is an example of?
A
Cohesion
B
Adhesion
C
Surface tension
D
Capillary action
5) What is the pH of water?
A
7; it is an acid
B
7; it is neutral
C
0; it is neutral
D
7; it is a base
6) Why does water have high cohesion?
A
Water is non-polar and opposite charges attract.
B
Water is non-polar and opposite charges repel.
C
Water is polar and opposite charges repel.
D
Water is polar and opposite charges attract.
7) When food coloring climbs the stem of a flower, changing its color, it is evidence of
A
Surface Tension
B
Condensation
C
Capillary action
D
Density
8) Which two forces are working together to make a dome on a penny?
A
Adhesion and Surface Tension
B
Cohesion and Surface Tension
C
Cohesion and Adhesion
D
Cohesion and Capillary Action
9) What is the meaning of capillary action?
A
The curved upper surface of a liquid in a graduated cylinder
B
Water sticking to water
C
Water sticking to something else
D
The upward movement of water due to cohesive and adhesive properties
10) True or False: The hydrogen atoms in water are slightly negative.
A
False
B
True
11) Why does ice float in water?
A
Ice is more dense because of the tightly packed water molecules in ice crystals.
B
Ice is less dense than water due to the large space between water molecules in ice crystals.
C
Ice is less dense because of the tightly packed water molecules in ice crystals.
D
Ice is more dense because of the large space between water molecules in ice crystals.
12) Why do water molecules stick together?
A
One side has a positive charge and the other side has a negative charge
B
Both sides are positive
C
One side has a negative charge and the other side has a neutral charge
D
Both sides are negative
13) Why is water called the universal solvent?
A
Water can climb up tubes or small spaces
B
Because water is non-polar and can dissolve many substances
C
Water has a high surface tension
D
Because water is polar and can dissolve many substances
14) What percentage of the Earth's water is fresh water?
A
3%
B
5%
C
10%
D
97%
15) What is the only substance on Earth to exist in all 3 states?
A
Salt
B
Oil
C
Sugar
D
Water
16) What is the boiling point of water?
A
50 degrees Celsius
B
90 degrees Celsius
C
100 degrees Celsius
D
110 degrees Celsius
17) Gas to liquid
A
Precipitation
B
Condensation
C
Evaporation
D
Sublimation
18) Solid to gas
A
Sublimation
B
Freezing
C
Melting
D
Condensation
19) Solid to liquid
A
Freezing
B
Melting
C
Evaporation
D
Condensation
20) Liquid to gas
A
Melting
B
Evaporation
C
Condensation
D
Freezing
*select an answer for all questions
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