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SOL 6.5 a. b. d: Water Properties and Molecule Structure

Total questions: 49

Worksheet time: 2hrs 23mins

Name
Class
Date
1.

What are the three states of water? (MARK ALL THAT APPLY.)

a)

solid

b)

liquid

c)

gas

d)

goo

2.
Water striders can walk across the surface of calm water. Their feet push the surface of the water down slightly, but they do not break the surface. Why?
a)
The insects are light enough so they do not break the hydrogen bonds holding the water molecules together
b)
The insects actually use their wings to hover slightly above the water’s surface and they only skim it with their feet.
c)
The insect’s feet are non-polar, so they are repelled by the polar water molecules and are pushed away from the water’s surface.
d)
The insects are small enough to see the individual water molecules, so they are able to step carefully from one molecule to the next
3.
What two elements make up water?
a)
Helium and oxygen
b)
Hydrogen and oxygen
c)
helium and carbon
d)
oxygen and carbon
4.
Water is polar because...
a)
The unequal sharing of electrons gives the water molecule a slight negative charge near its oxygen atom and a slight positive charge near its hydrogen atoms.
b)
The molecule has two poles, at which the it is colder than other regions of the molecule.
c)
The unequal sharing of electrons gives the water molecule a slight negative charge near its hydrogen atoms and a slight positive charge near its oxygen atom.
d)
The water molecule is neutral.
5.
Water is a universal solvent because it...
a)
It can be found anywhere
b)
It freezes when it gets cold
c)
floats when frozen
d)
Dissolves most substances
6.

The atoms in a water molecule are held together by special covalent bonds called polar bonds. Because they are covalent, this means that they_____________________________.

a)

Lose protons

b)

Lose electrons

c)

Share electrons

d)

Switch neutrons

7.

When dissolving salt in water, the salt is the______________ part of the salt water solution.

a)

solvent

b)

solute

c)

sailing

d)

saline

8.
What word describes when water is attracted to other substances?
a)
cohesion
b)
adhesion
c)
capillary action
d)
surface tension
9.
Attractions between water molecules are called
a)
Covalent bonds
b)
Ionic bonds
c)
Polar bonds
d)
Hydrogen bonds
10.
molecule in which opposite ends have opposite electric charges
a)
cohesion
b)
polar molecule
c)
hydrogen bond
d)
solution
11.
A molecule with electrically charged areas is called a _______________.
a)
magnet
b)
polar molecule
c)
solution
d)
electrical molecule
12.
Which end of the water molecule has a slightly positive charge?
a)
the oxygen end
b)
the hydrogen end
c)
both ends are slightly positive
d)
neither end is positive
13.
Water molecules are attracted to other kinds of molecules because of the property.
a)
Cohesion
b)
Adhesion
c)
Surface Tension
d)
Universal Solvent
14.
Water beads up on the surface of a penny because of this property.
a)
Adhesion
b)
High Surface Tension
c)
Universal Solvent
d)
Changes in Density
15.
The fact that ice floats on liquid water is due to the fact that water's solid is ___________ than it's liquid form
a)
less polar
b)
more polar
c)
less dense
d)
more dense
16.
A general definition of cohesion is the attraction of:
a)
particles of the same substance
b)
particles of a different substance
c)
particles of both the same and different substances
d)
particles of neither the same or different substances
17.

water is a .............................. molecule.

a)

nonpolar

b)

polar

18.
What property of water helps to moderate earth's temperature?
a)
adhesion
b)
chohesion
c)
Specific heat capacity
d)
Latent heat of vaporization
19.
What is the tendency of water molecules to stick to other surfaces?
a)
cohesion
b)
adhesion
c)
high heat capacity
d)
universal solvent
20.
A water molecule is a ________ molecule, which has one oxygen that has a __________ charge and two hydrogens that have a ___________ charge.
a)
nonpolar, positive, negative
b)
polar, positive, negative
c)
polar, negative, positive
d)
nonpolar, negative, positive
21.
tendency of molecules of the same kind to stick to one another
a)
cohesion
b)
adhesion
c)
solution
d)
polar molecule
22.
This photos shows water molecules in which state of matter...
a)
Solid
b)
Liquid
c)
Gas
23.

How does removing heat energy to water in a gas state affect the molecules?

a)

Removing heat energy from a gas causes the molecules to slow down and bond in a crystal formation.

b)

Removing heat energy from a gas causes the molecules to move very rapidly.

c)

Removing heat energy from a gas causes the molecules to slow down and begin to bond with each other.

24.
Which of the following describes water molecules in the solid state?
a)
Water molecules that are moving at an extremely rapid rate.
b)
Water molecules that are made of hydrogen and oxygen.
c)
Water molecules that are not moving at all.
d)
Water molecules that are broken apart a little bit and moving slightly.
25.
Which atoms bond together to create a water molecule?
a)
Oxygen and Hydrogen
b)
Carbon and Oxygen
c)
Hydrogen and Helium
d)
Helium and Carbon
26.

What is a very unique property of water?

a)

It is what humans drink.

b)

It is everywhere.

c)

It is clear.

d)

It can be in all 3 states of matter

27.
What is a water molecule composed of?
a)
1 Hydrogen atom and 2 Oxygen atoms
b)
2 Hydrogen atoms and 1 Oxygen atom
c)
3 Oxygen atoms
d)
2 Helium atoms and 1 Oxygen atom
28.
Which of the following describes water molecules in the gaseous state?
a)
Water molecules that are made of hydrogen and oxygen.
b)
Water molecules that are broken apart a little bit and moving slightly.
c)
Water molecules that are moving at an extremely rapid rate.
d)
Water molecules that are not moving at all.
29.
This photo shows water molecules in which state of matter?
a)
Liquid
b)
Solid
c)
Gas
30.

How does removing heat energy from water in a liquid state affect the molecules?

a)

Removing heat energy from a liquid causes the molecules to stay the same.

b)

Removing heat energy from a liquid causes the molecules to move rapidly and break apart more.

c)

Removing heat energy from a liquid causes the molecules to stop moving and bond in a crystal formation.

31.

How much of Earth's water is freshwater?

a)

1%

b)

3%

c)

77%

d)

97%

32.

Earth's water supple is constantly recycled in the _______________

a)

water system

b)

water cycle

c)

water pattern

d)

recycling system

33.

How much of Earth's freshwater is usable by humans?

a)

1%

b)

3%

c)

77%

d)

97%

34.

What is the chemical formula for water?

a)

CO2

b)

C2O2

c)

HSO4

d)

H2o

35.

What are solvents?

a)

Substances that are dissolved in other substances.

b)

solute

c)

Substances that dissolve other substances,

d)

solutions

36.

Because water's positive and negative polar ends attract other substances and pull them apart, water can

a)

dissolve many substances

b)

make new substances

c)

taste sour

d)

taste sweet

37.

At what Celsius temperature does water boil?

a)

0 degrees

b)

80 degrees

c)

100 degrees

d)

273 degrees

38.

What Celsius temperature does water freeze?

a)

0 degrees

b)

80 degrees

c)

100 degrees

d)

273 degrees

39.

Condensation is:

a)

liquid changing to a gas

b)

liquid changing to a solid

c)

a gas changing to a liquid

d)

solid changing to a gas

40.

Evaporation is:

a)

gas changing to a liquid

b)

liquid changing to a gas

c)

solid changing to a gas

d)

solid changing to a liquid

41.

Which is the right way to make a model of a water molecule?

a)
b)
c)
42.

Because negative end of one water molecule is attracted to

the positive end of another water molecule they:

a)

fall apart

b)

are explosive

c)

smell bad

d)

stick together like magnets

43.

Which is less dense, a pitcher of liquid water or frozen water?

a)

frozen water

b)

liquid water

44.

Which letter shows a location in VA that is warmest during the winter time and why?

a)

Letter "A" because the snow high in the mountains is warmer.

b)

Letter "B" because it is furthest west away from the warm ocean waters.

c)

Letter "C" because it is near the warm ocean waters that hold heat longer than land.

45.

How many atoms of Hydrogen does a molecule of water have?

a)

1

b)

2

c)

3

d)

4

46.

Check all the temperatures in which water could be a liquid?

a)

105 degrees celcius

b)

54 degrees celcius

c)

71 degrees celcius

d)

-10 degrees celcius

47.

Which letter shows a location that is warmest during the winter time?

a)

A

b)

B

c)

C

d)

A, B, and C

48.

Does water have a high or low specific heat?

a)

low

b)

high

c)

medium

49.

How does water's high specific heat rating affect the time it takes to heat up and cool down?

a)

Fast to heat up, fast to cool down

b)

Slow to heat up, fast to cool down

c)

Slow to heat up, slow to cool down

d)

Fast to heat up, slow to cool down

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