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Science > Energy > Flashcards

Energy Flashcards

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0
Q

Energy Transformation?

A

A change from one form of energy to author is called______________or an energy conversion.

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1
Q

What is fuel ?

A

Is a substance that provides energy -such as heat,light,motion,or electricity.As a result of a chemical change .

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2
Q

What is combustion ?

A

Fuels contain stored chemical energy which can be released by ________or burning .

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3
Q

What are fossil fuels ?

A

Is energy rich substance formed from the remains organisms.

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4
Q

Hydrocarbons?

A

Are chemical compounds that contain carbon and hydrogen atoms

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5
Q

What is Petroleum?

A

Is anther name for oil ,liquid ,fossil fuels .

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6
Q

Refinery?

A

Crude oil is heated and separated into fuels and other products

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7
Q

What are Petrochemical?

A

Compounds that are made from oil .(plastics,paints,medicine,and cosmetics)

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8
Q

What are 3 main fossil fuels ?

A

Coal,Oil,and Natural Gas

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9
Q

What is Hydroelectric Power ?

A

Electricity produced by flowing water (Dam Bridge)

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10
Q

What is Biomass fuels ?

A

A group of fuels which are made from living things

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11
Q

What is Gasohol ?

A

Adding the alcohol to gasoline can be used as fuel for cars .

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12
Q

Geothermal energy ?

A

Intense heat from earths interior that warms the magma

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13
Q

What are five renewable energy sources ?

A

Geothermal,biomass fuels, water, wind,and hydrogen .

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14
Q

Energy resources come in 2 forms

A

Non-renewable

Renewable

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15
Q

What is Non- renewable

A

Gone once they are used up (take thousands of years to re- form )

16
Q

Define Fossil fuels

A

Provide most of the energy we use today (formed from remains of organisms )

17
Q

What are 3 types of Fossil Fuels ?

A

Coal, Oil, and Natural Gas

18
Q

What’s coal ?

A
  • The are formed from plant remains

- Must be mined from the ground

19
Q

What’s Oil?

A
  • liquid Fossil

- Formed from small animals ,algae,and other organisms that lived in the SEA millions years ago

20
Q

What’s Natural Gas ?

A
  • mixture of methane + other gases

- Forms from some of the fm same organisms as oil

21
Q

Define Renewable

A
  • constantly being supplied

- scientist are working to find ways to use these resources to meet our energy needs

22
Q

The types of Renewable resources (6)

A 
Solar Energy 
Hydroelectric Power 
Wind power 
Biomass Fuels 
Geothermal Energy 
Hydrogen Power
24
Q

Hydroelectric power

A
  • power produced by flowing water
  • a dream built across a river blocks
  • the flow of water and creates a reservoir
25
Q

Wind power

A
  • wind can be used to turn a turbine and generate electricity
  • wind is a major source of power in places where it is difficult to transport fuel
26
Q

Biomass fuel

A
  • made from living things (wood, leaves, food waste ,manure )
  • Alcohol can be added to gas aline methane create by bacteria can hear buildings ,etc.
27
Q

Geothermal Energy

A
  • water is heated by the magma (melted rock) under Earths surface
28
Q

Hydrogen Power

A
  • pure hydrogen burns cleanly ,creates no smog or acid rain ,exists on Earth in large supply
29
Q

Nuclear Power Plants

A

Another source of power comes from splitting the nucleus of an atom !-

  • about 20%of the U.S. + more than 70%of France’s energy comes from this source
  • the heat released by splitting atoms is used to change water into steam turns turbines to generate electricity
30
Q

2 ways to preserve our current energy resources

A

1) Increasing the efficiency of our energy use

2) Reducing energy use

31
Q

Increasing the efficiency of our energy use is …

A 
• Efficiency-the power percentage of energy actually used .Left over energy is usually lost as heat 
How can we increase ? 
1) insulation to trap heat loss 
2)better light bulbs 
3)better car tires and engines 
4) reduce the number of cars on the road
32
Q

Reducing Energy use is….

A

1) riding a bike or walk instead of driving
2) Recycle
3) use a fan instead of air conditioning

33
Q

What is it called when energy is stored we call it ________

A

Potential

34
Q

Energy moving is called

A

Kinetic energy

35
Q

Water used to power generator creating

A

Electrical energy

36
Q

3 substance can make electricity

A

Burning coal
Falling water
Nuclear power

37
Q

Fossil fuels are something that we pump or_______up .

A

Dig

38
Q

Energy from our foods which began as _____ energy from the sun .

A

Light

52
Q

Solar energy

A
  • comes from the sun
  • is the source either directly or indirectly of most other renewable energy sources
  • Earth revives enough solar energy for 40 years

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