Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

Bioenergy > Lecture 2 > Flashcards

Lecture 2 Flashcards

1
Q

What has the rapid use of fossil fuels pumped into the air

A

Carbon dioxide

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

Carbon dioxide in the air has led to ___

A

Temperature rise

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

Temperature rise is due to the ___

A

Greenhouse effect

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

Why is there seasonal variation in carbon dioxide levels

A

Changes in vegetation in the north and south hemispheres

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

Why will we likely stop pumping CO2 into the atmosphere

A

We have likely already reached the peak of oil production

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

Are fossil fuels renewable

A

No

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

Sustainability

A

The ability of a process to continue indefinitely without depleting any of the material or energy resources required to keep in running

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

Industries that constantly worry about sustainability

A

Fishing and forestry

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

What does sustainable energy require

A

The production of energy that does not deplete resources

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

Options for sustainable energy

A
  1. hydro
  2. solar
  3. wind
  4. geothermal
  5. bioenergy
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

Energy that is an alternative but not sustainable

A

Nuclear

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

Hydro

A

Water power

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

Water power is indrect ___

A

Solar power

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

Water power provides __/6th of the world’s annual electrical output and over ___% of the electricity produced from renewables

A

1
90%

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

Hydro power is derived from ____

A

The hydrological climate cycle

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

Hydro power is powered by ___

A

Solar energy

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

Tidal energy is the result of ___

A

The interaction of the gravitational pull of the moon (and the sun to some extent) on the seas

18
Q

What do tidal energy schemes rely on

A

Twice-daily tides and the flows and ebbs in estuaries and other bodies of water

19
Q

Problem in feeding power from tidal barrage into the national grid networks

A

Tidal energy inputs come in short bursts (approx. 12 hour intervals)

20
Q

Power can be produced for ___ hours during spring tides

A

5-6

21
Q

Power can be produced for __ hours during neap tides

A

3

22
Q

How long does a tidal cycle last

A

12.4 hours

23
Q

___ is the ultimate source of most of our renewable energy

A

Sun

24
Q

Types of solar energy

A
  • Solar thermal
  • Photovoltaics
25
Q

Solar thermal

A

Using the sun to produce heat

26
Q

Photovoltaic

A

Using the sun to generate electricity

27
Q

Forms of low and high temperature solar thermal technology

A
  • Active solar heating
  • Solar thermal engines
  • Passive solar heating
  • Daylighting
28
Q

Active solar heating

A

Involves a discrete solar collector usually mounted on a roof

29
Q

Solar thermal engines

A

Produce temperatures high enough to drive steam turbines to produce electricity

30
Q

Passive solar heating

A

Solar energy used directly in a building to reduce energy required

31
Q

Daylighting

A

Uses natural daylight through building design

32
Q

The net solar power input to the earth is more than ___X humanity’s current rate of fossil and nuclear fuel use

A

10,000

33
Q

Photovoltaics cells are typically made of ____

A

Silicon

34
Q

Second most abundant element in the earth’s crust

A

Silicon

35
Q

Where in the US is solar technology suitable

A

All states

36
Q

What are many windmills used for

A

Water pumping

37
Q

Can all states use wind turbines to generate electricity

A

Most can, but some areas are more suited than others

38
Q

Only form of renewable energy that is independent of the sun

A

Geothermal

39
Q

Source of geothermal energy

A

Within the earth

40
Q

How to use geothermal energy

A

One or more boreholes are drilled into the reservoir, and the hot fluid flows or is pumped to the surface. The hot fluid is then used in conventional steam turbines or heating equipment

41
Q

Is geothermal energy production available throughout the US

A

No, but heat exchange systems for houses are available in most places (but they do not typically generate electricity)

42
Q

Renewable energy is __ and __ specific

A

Location and resource specific

Bioenergy (22 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions