Unit D - Section 4 Flashcards

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1
Q

Fossil fuels

A

Formed from the decomposition of prehistoric plants and animals

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2
Q

Turbine

A

A long shaft with many fan blades

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3
Q

What turns the turbine

A

Stream striking the blade turns the turbine

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4
Q

Nuclear fission

A

In a nuclear reactor atoms of a heavy element are split in a chain reaction, this splitting is known as nuclear fission

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5
Q

What does nuclear fission release

A

An enormous amount of energy

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6
Q

Geothermal energy

A

Hot water and steam naturally come to the surface after having been heated by a hot rock

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7
Q

Biomass

A

Biomass is described as garbage

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8
Q

Energy sources

A
  • Tides
  • Wind
  • Sunlight
  • Batteries
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9
Q

Fuel cells

A

Generates electricity directly from a chemical reaction with a fuel such as hydrogen

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10
Q

Non Renewable

A

Cannot be replaced as it is used up

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11
Q

Renewable

A

Can be renewed or replenished

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12
Q

Fly ash

A

Ash carried up the smokestack of the power plant and escapes into the atmosphere

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13
Q

Sustainability

A

Using resources at a rate that can be maintained indefinitely

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14
Q

Binary numbers

A

Numbers with js ones and zeros

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15
Q

What do DVDs store

A

Stores audio, video and text which makes information easier to understand and more entertaining

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16
Q

Most harmful molecules are

A

Sulfur dioxide - causes acid rain and contributes to air pollution
Nitrogen oxides - major cause of air pollution
Carbon dioxide - cause of global warming