Unit 6 modules 37, 39, 40

Question 1

finding and implementing ways to use less energy.

Answer 1

Energy conservation

Question 2

A billing system used by some electric companies in which customers pay higher rates as their use goes up.

Answer 2

Tiered rate system

Question 3

The greatest quantity of energy used at any one time.

Answer 3

Peak demand

Question 4

What are the least expensive and most environmentally sound options for maximizing our energy sources?

Answer 4

Energy conservation and energy efficiency

Question 5

improves the efficiency of the buildings and communities in which we live and work.

Answer 5

Sustainable design

Question 6

What do sustainable building designs incorporate?

Answer 6

• solar orientation(solar panels)
• landscaping
• insulated windows, walls, and floors in the Northern hemisphere

Question 7

What allows the house to receive more direct rays from the sun in winter when the path of the sun is in the southern sky?

Answer 7

A southern exposure

Question 8

Construction designed to take advantage of solar radiation without active technology.

Answer 8

Passive solar design

Question 9

A property of a building material that allows it to maintain heat or cold.

Answer 9

Thermal mass

Question 10

An energy source that can be regenerated indefinitely as long as it is not overharvested.

Answer 10

Potentially renewable

Question 11

An energy source that cannot be used up.

Answer 11

Nondepletable

Question 12

In energy management, an energy source that is either potentially renewable or nondepletable.

Answer 12

Renewable

Question 13

What is it called when renewable energy resources provide about 13 percent of energy worldwide

Answer 13

Global energy use

Question 14

Only ___ percent of the energy used in the United States comes from renewable energy resources.

Answer 14

7

Question 15

What type of solar energy can be used to lower your electricity bill, without pumps or other mechanical devices?

Answer 15

Passive solar energy

Question 16

What kind of solar design has houses with windows along a south-facing wall which allows the suns rays to warm the house?

Answer 16

passive solar design

Question 17

What kind of design uses solar radiation to maintain indoor temperature.

Answer 17

Passive solar design

Question 18

what solar design uses roof overhangs making use of seasonal changes in the sun’s position to reduce energy in demand for heating and cooling.

Answer 18

passive solar design

Question 19

how does passive solar design work in winter?

Answer 19

when sun is low it shines directly into the window and heats the house

Question 20

how does passive solar design work in summer?

Answer 20

when sun is higher the overhang blocks incoming sunlight and the room stays cool

Question 21

what solar design uses High-efficiency windows and building materials with high thermal inertia?

Answer 21

passive solar design

Question 22

How much energy does an average american household consume?

Answer 22

900 kwh/month

Question 23

Energy captured from sunlight with advanced technologies.

Answer 23

Active solar energy

Question 24

technologies that employ active solar energy include

Answer 24

• Solar water heating systems
• photovoltaic systems

Question 25

A system of capturing energy from sunlight and converting it directly into electricity.

Answer 25

Photovoltaic solar cell

Question 26

large - scale concentrating solar thermal systems for electricity generation (CST)

Answer 26

Active solar energy

Question 27

what are some benefits of solar energy systems?

Answer 27

- generates hot water / electricity without producing CO2 or pollutants - produces electricity on hot days when in high demand - produces electricity during peak demands - could be less expensive then running electrical transmission lines to some homes

Question 28

What are some drawbacks of active solar energy systems?

Answer 28

- photovoltaic solar panels are expensive - manufacturing panels requires energy, water, and involves toxic metals and chemicals - environmental costs associated with batteries - isn't easily recycled

Question 29

Energy generated from the kinetic energy of moving air.

Answer 29

Wind energy

Question 30

What is the fastest growing major source of electricity in the world?

Answer 30

wind energy

Question 31

what country generates more electricity from wind than any other country?

Answer 31

china

Question 32

what small country generates a much higher percentage of their electricity wind?

Answer 32

Denmark

Question 33

A turbine that converts wind energy into electricity.

Answer 33

wind turbine

Question 34

Where are wind turbines on land typically installed?

Answer 34

in rural locations, away from buildings and population centers

Question 35

what are turbines typically grouped into

Answer 35

wind farms or wind parks

Question 36

how does energy get transfered from a wind turbine?

Answer 36

blades of the wind turbine transfer energy to gearbox that transfers energy to the generator

Question 37

advantages of wind energy

Answer 37

- nondepletable - little energy input is required after installation - produces no pollutions and greenhouse gases - can share land for other uses

Question 38

what are some disadvantages of wind energy?

Answer 38

- noisy and unattractive - as many as 40,000 are killed by wind turbines in U.S. each year - bats are also killed - most off-grid wind energy rely on batteries to store

Question 39

heat energy that comes from the natural radioactive decay of elements deep within Earth.

Answer 39

Geothermal energy

Question 40

What 3 countries has substantial geothermal resources, and is the largest geothermal energy producers?

Answer 40

U.S., China, Iceland

Question 41

can be used directly as a source of heat

Answer 41

geothermal energy

Question 42

many countries obtain clean, renewable energy from, ____________

Answer 42

geothermal resources

Question 43

A technology that transfers heat from the ground to a building.

Answer 43

ground source heat pump

Question 44

what are heat pumps often referred as?

Answer 44

geothermal

Question 45

a ground source heat pump can heat and cool a building using how much less energy than traditional furnaces and air conditioners?

Answer 45

30 to 70 percent

Question 46

An electrical-chemical device that converts fuel, such as hydrogen, into an electrical current.

Answer 46

fuel cell

Question 47

The application of an electric current to water molecules to split them into hydrogen and oxygen.

Answer 47

electrolysis

Question 48

what is the only waste product from the reaction of a hydrogen fuel cell?

Answer 48

water

Question 49

what is the fuel that reacts with O2 to provide electricity to run motor in fuel cell vehicle?

Answer 49

hydrogen

Question 50

An efficient, self-regulating electricity distribution network that accepts any source of electricity and distributes it automatically to end users.

Answer 50

smart grid

Question 51

what does a sustainable energy strategy have to consider?

Answer 51

costs, benefits, and limitations of each energy source

Question 52

A sustainable energy strategy must combine:

Answer 52

1. energy efficient 2. energy conservation 3. Development of renewable and nonrenewable energy resources

Question 53

optimizes the use of energy in a home by continuously coordinating energy use with energy availability.

Answer 53

A smart grid