Renewable Energy

Question 1

How much renewable energy supplies the U.S.

Answer 1

8%

Question 2

How much renewable energy supplies the world?

Answer 2

18%

Question 3

Where is renewable energy derived from?

Answer 3

Sun’s energy

Question 4

What is Biomass?

Answer 4

organic plant matter produced by photosynthesis; bioenergy is obtained from it

Question 5

How much of Biomass supplies the US

Answer 5

50%

Question 6

How much of Biomass supplies the world?

Answer 6

80%

Question 7

Biopower generates electricity from what sources? (2)

Answer 7

1) waste products

2) bioenergy crops

Question 8

How can bio mass be used in vehicles

Answer 8

ethanol for gas

Question 9

What are some problems with biofuels?

Answer 9

1) growing corn for ethanol causes negative impacts on environment
2) growing corn for ethanol requires large amounts of fossil fuels
3) not energy efficient

Question 10

How much solar energy is supplied to the U.S?

Answer 10

15%

Question 11

How much had solar grown annually world wide in the last 40 years?

Answer 11

30%

Question 12

Active Solar system

Answer 12

specially designed collected that concentrate solar energy and store it as heat for space and/or water heating

Question 13

Photovoltaic solar cells?

Answer 13

converts solar radiation directly into electricity

Question 14

What are thin-film solar cells?

Answer 14

Photovoltaic materials compressed into ultra thin sheets

Question 15

benefits of solar energy? (6)

Answer 15

1) inexhaustible source
2) uses no fuel, so no air pollution
3) safe
4) little maintenence
5) does not need to be near a power plant
6) creates green jobs

Question 16

Disadvantages of Solar energy (3)

Answer 16

1) not all regions are sunny
2) storage required
3) high costs

Question 17

What were windmills first used for?

Answer 17

first used in 1600’s to pump water and grind grain

Question 18

What are windmills now used for?

Answer 18

to generate electricity for farms beyond utility poles

Question 19

True or false; Today wind energy is the cheapest form of alternative energy

Answer 19

True

Question 20

How much wind energy could supply the U.S. by 2030?

Answer 20

1/5

Question 21

Where is Geo thermal energy from?

Answer 21

from heat of earth’s interior

Question 22

Geo-thermal energy: Dry Steam

Answer 22

Steam with no water droplets

Question 23

Geo-thermal energy: Wet Steam

Answer 23

a mixture of steam and water droplets

Question 24

Geo-thermal energy: Hot dry rock

Answer 24

molten rock penetrates the earth’s crust and heats the subsurface rocks

Question 25

Most common geo-thermal type?

Answer 25

hot water

Question 26

How much of the world’s electricity does hydropower produce

Answer 26

16%

Question 27

Where does Hydropower get its power from

Answer 27

from flowing water

Question 28

What was the original purpose of Hydropower

Answer 28

flood control

Question 29

How is tidal energy produced

Answer 29

Produced by erecting dams across tidal basin outlets

Question 30

Benefits of Hydrogen

Answer 30

1) most abundant element
2) energy efficient
3) silent and non polluting

Question 31

Detriments of Hydrogen

Answer 31

1) lack of infrastructure

2) can deplete ozone layer