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Water Properties and the Ocean

Total questions: 42

Worksheet time: 34mins

Name
Class
Date
1.

When water molecules stick to each other, it is called_________________

a)

cohesion

b)

adhesion

c)

polarity

d)

molecules

2.

What is polar molecule?

a)

in which one element pulls on the shared electrons more than the other element in a bond

b)

when water is really dense

c)

when water freezes and turns into ice

d)

when ice turns in to water vapor

3.

Hydrogen Bond

a)

Attraction between a slightly positive hydrogen atom and a slightly negative atom. This bond occurs between two water molecules.

b)

The process by which plants and some other organisms use light energy to convert water and carbon dioxide into oxygen and high-energy carbohydrates such as sugars and starches

c)

The process of turning from liquid into vapor.

d)

The ability to dissolve many different solutes

4.

Specific heat capacity

a)

The amount of energy required to change a substance's temperature

b)

Downward movement of water through soil into groundwater.

c)

Rain, snow, sleet, or hail that falls to the ground.

d)

The change of a substance from a liquid to a gas

5.

Adhesion

a)

An attraction between molecules of different substances

b)

Attraction between molecules of the same substance

c)

Anything that has mass and takes up space

d)

a positively charged ion (H+) formed of a hydrogen atom that has lost its electron

6.

universal solvent

a)

The ability of water to dissolve many different substances

b)

Pull of water molecules upwards against gravity

c)

Molecules having uneven distribution of charges.

d)

amount of heat energy needed to increase a substance's temperature

7.

What is the water molecule made up of?

a)

2 hydrogen 1 oxygen

b)

2 oxygen 1 hydrogen

c)

1 platinum 2 oxygen

d)

2 hydrogen 2 oxygen

8.

Polar Covalent Bond

a)

A covalent bond in which electrons are not shared equally (results in an uneven charge across the molecule, eg water)

b)

Water loving

c)

A substance made up of atoms of two or more different elements joined by chemical bonds - can be broken down

d)

a covalent bond in which the electrons are shared equally by the two atoms (no net charge)

9.

__________________ means that water has two poles like a magnet.

a)

Polarity

b)

Water Properties

c)

Surface Tension

d)

Adhesion

10.

Ice floating in water is an example of

a)

Density

b)

Adhesion

c)

Cohesion

d)

Capillary Action

11.

Why does ice float?

a)

as water freezes, molecules expand and its density decreases

b)

as water freezes, molecules move closer and its density decreases

c)

surface tension as a result of hydrogen bond

d)

hydrogen and oxygen

12.
What number indicates the nucleus?
a)
1
b)
2
c)
3
d)
4
13.
What type of bond forms when 2 or more electrons are SHARED?
a)
Covalent bond
b)
Incomplete bond
c)
Ionic bond
d)
Metallic bond
14.

What property of water helps to moderate Earths temperature?

a)

specific heat capacity

b)

hydrogen bonds

c)

as water freezes, it expands and its density decreases

d)

capillarity

15.

A water strider can skate along the top of a pond because...

a)

hydrogen bonds result in water cohesion (surface tension)

b)

specific heat capacity

c)

when water in a lake freezes, it floats, providing insulation for organisms below

d)

surface tension as a result of hydrogen bonds

16.

Which type of bonds are formed within a molecule of NH3 (ammonia).

a)

Covalent Bond

b)

Ionic Bond

c)

Hydrogen Bond

d)

Atomic Bond

17.

The hydrogen molecules have a slightly _____________ charge

a)

positive

b)

negative

c)

neutral

d)

small

18.
Why do elements bond?
a)
To be friends
b)
To create a new element
c)
To become stable
19.

The oxygen molecule has a slightly _________________ charge

a)

positive

b)

neutral

c)

negative

d)

opposite

20.

TRUE OR FALSE:

Hydrogen bonds are very strong interactions between two atoms.

a)

True

b)

False

21.

Hydrogen bonds are VERY important in determining the many properties of this very important molecule

a)

Water

b)

Carbon Dioxide

c)

Oxygen Gas

22.
What is evaporation?
a)
The part of the water cycle when the sun heats up water, turning it from a liquid into water vapor or steam. It rises from the ground into the air.
b)
The part of the water cycle when the water vapor in the air gets cold. The water turns back into a liquid and forms clouds.
c)
The part of the water cycle when clouds get heavy and can no longer hold the liquid water. This causes the water to fall from the sky to the earth as rain, snow, sleet, or hail.
23.

Which type of bond is formed between Potassium (K) and Chlorine (Cl)?

a)

Covalent Bond

b)

Ionic Bond

c)

Hydrogen Bond

d)

Atomic Bond

24.
Large bodies of water, such as lakes and oceans, do not quickly fluctuate in temperature. What is the reason for this phenomenon?
a)
Water is an acid.
b)
Water is a versatile solvent.
c)
Water has a high heat capacity.
d)
 Water acts as a buffer.
25.
As salinity  increases
a)
Density increases
b)
Density decreases
26.
Ocean depth  increases & Salinity  increases then
a)
Temperature decreases because cold water is more dense and sinks
b)
Temperature increases because cold water is more dense and sinks
27.

When an object or substance is cooler, its particles move slower and are closer together

a)
True
b)
False
28.
What is water that flows in rivers and streams into the oceans and lakes?
a)
evaporating
b)
condensing
c)
precipitating
d)
runoff
29.
When an object or substance is warmer, its particles move faster and get further apart (Tip for remembering: they are warmer and want to get cooler by moving away from one another)  True or False
a)
True
b)
False
30.
As Density  increases
a)
Temperature decreases
b)
Temperature increases
31.

What is the average salt content of the ocean?

a)

10ppt

b)

15ppt

c)

27ppt

d)

35ppt

32.
True or False Salinity increases as ocean depth increases.
a)
True
b)
False
33.
At which latitudes are the highest surface salinities located? See graph the Atlantic or the Pacific
a)
About 20o N and S latitude
b)
About 30o N and S latitude
34.
Briefly describe the overall relationship between temperature and density.
a)
Lower temperature water has higher density, warmer water has lower density
b)
Lower temperature water has lower density, warmer water has higher density
35.
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.
36.

Which of these constituents do NOT makeup the salinity of the ocean?

a)

Fluorine

b)

Sodium

c)

Chloride

d)

Magnesium

37.

The pycnocline is the layer where . . .

a)

density decreases rapidly

b)

salinity decreases rapidly

c)

density increases rapidly

d)

salinity increases rapidly

38.

What is vapor pressure?

a)

the force of the gas above a liquid

b)

the force of a gas below a liquid

c)

the force of a liquid below a gas

d)

boiling point

e)

evaporation

39.

if the temperature increases, then vapor pressure will

a)

increase

b)

decrease

c)

cannot tell

d)

stay the same

40.

When water vapor is cooled and forms droplets of liquid water

a)

Condensation

b)

Evaporation

c)

Transpiration

d)

Runoff

41.
What is condensation?
a)
The part of the water cycle when the sun heats up water, turning it from a liquid into water vapor or steam. It rises from the ground into the air.
b)
The part of the water cycle when the water vapor in the air gets cold. The water turns back into a liquid and forms clouds.
c)
The part of the water cycle when clouds get heavy and can no longer hold the liquid water. This causes the water to fall from the sky to the earth as rain, snow, sleet, or hail.
42.

Water that has soaked into the ground is known as ______.

a)

Precipitation

b)

Groundwater

c)

Runoff

d)

Water Vapor

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