Unit D - Section 4

Question 1

Fossil fuels

Answer 1

Formed from the decomposition of prehistoric plants and animals

Question 2

Turbine

Answer 2

A long shaft with many fan blades

Question 3

What turns the turbine

Answer 3

Stream striking the blade turns the turbine

Question 4

Nuclear fission

Answer 4

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

Question 5

What does nuclear fission release

Answer 5

An enormous amount of energy

Question 6

Geothermal energy

Answer 6

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

Question 7

Biomass

Answer 7

Biomass is described as garbage

Question 8

Energy sources

Answer 8

• Tides
• Wind
• Sunlight
• Batteries

Question 9

Fuel cells

Answer 9

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

Question 10

Non Renewable

Answer 10

Cannot be replaced as it is used up

Question 11

Renewable

Answer 11

Can be renewed or replenished

Question 12

Fly ash

Answer 12

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

Question 13

Sustainability

Answer 13

Using resources at a rate that can be maintained indefinitely

Question 14

Binary numbers

Answer 14

Numbers with js ones and zeros

Question 15

What do DVDs store

Answer 15

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

Question 16

Most harmful molecules are

Answer 16

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