• Global warming

Question 1

• Global warming

Answer 1

– a gradual increase in air temperatures near Earth’s surface.

Question 2

• Greenhouse effect

Answer 2

– atmospheric heating caused by certain gases in Earth’s atmosphere that are transparent to sunlight but absorb and reflect heat that comes from Earth’s surface.

Question 3

• Greenhouse gas

Answer 3

a gas in Earth’s atmosphere that absorbs and then re-radiates heat.

Question 4

• Heat flow

Answer 4

– the transfer of thermal energy from a warmer object to a cooler object

Question 5

• Aquifer

Answer 5

an underground layer of porous rock and/or sand that contains water

Question 6

• Condensation

Answer 6

change from a gas to a liquid

Question 7

• Evaporation

Answer 7

– change from a liquid to a gas at temperatures below boiling

Question 8

• Freezing

Answer 8

changing from a liquid to a solid.

Question 9

• Glacier

Answer 9

a large, slowly moving body of snow and ice

Question 10

• Melting

Answer 10

– changing from a solid to a liquid

Question 11

• Phase change

Answer 11

a change from one state of matter to another

Question 12

• Precipitation

Answer 12

water that falls to Earth’s surface.

Question 13

• Reservoir

Answer 13

– a body of water, often an artificial lake, which is used to store water for human use.

Question 14

• Runoff

Answer 14

water that moves across the surface of land into streams or rivers

Question 15

• Transpiration

Answer 15

the release of water vapor from the leaves of plants

Question 16

• Water cycle

Answer 16

the continuous movement of water from Earth’s surface to the atmosphere and back again

Question 17

• Bacterial pollution

Answer 17

the presence of harmful bacteria in water supplies

Question 18

• Nutrient pollution

Answer 18

the presence of excess nutrients in the water.

Question 19

• Sediment pollution

Answer 19

– the presence of excessive sediments such as silt and clay in water

Question 20

• Toxic pollution

Answer 20

– the presence of toxic substances in water

Question 21

• Water pollution

Answer 21

the introduction of harmful substances into water

Question 22

Description, Causes, and consequences of sediment pollution:

Answer 22

Description: Pollution by sand, soil, and other minerals that are washed into streams and rivers after rainfall.
Caused by careless farming, mining, and building activities.
Consequences: Destruction of fish and wildlife habitat, clouds water.

Question 23

Description, Causes, and consequences of Nutrient pollution:

Answer 23

Description: contamination of water by excessive nutrients, usually mitrogen and phosphorus.
Causes: Fertillizer, manure, and human waste
Consequences: excessive algae reduce sunlight passing through water.

Question 24

Description, Causes, and consequences of Bacterial polluition:

Answer 24

Description: Contamination of water by bacteria.
Causes: Manure, human, and spoiled food.
Consequences: Human, animal, and plant heath problems.

Question 25

What actions can you take to reduce water pollution?

Answer 25

Dispose of harmful chemicals such as paint, paint thinner, oil, pesticides, and cleaning solvents. Not using to much fertilizer on the grass and check under the car for spills.

Question 26

How does the Sun cause water to move from the oceans to the atmosphere?

Answer 26

Ocean water is heated by the sun, causing it to evaporate into the atmosphere.

Question 27

Water covers over two-thirds of Earth’s surface. Yet water shortages are a major problem for many people around the world. Why do you think this is the case?

Answer 27

Over 97% of Earth's water is salt water, which is not useful to people. Fresh water on earth is locked up in glaciers and ice caps, so it connot be used either. Only about 1% of Earth's water is avilable for human use. Some people use excessive amount of water, leaving less for others to use.

Question 28

What is the difference between a while loop and a for loop?

Answer 28

A for loop execute a code for a setr number of times...A while loop executes its sub-diagram while the ondintional terminal recieves a true value.