C11

Question 1

Carbon footprint

Answer 1

The total amount of carbon dioxide and other greenhouse gases emotted ovee the full life cycle of a product, service or event

Question 2

Global dimming

Answer 2

A process that reduces the amount of sunlight reaching the earths surface. It is caused by particulates in the atmosphere reflecting light back into space before it can reach earth

Question 3

Incomplete combustion

Answer 3

When a fuel burns in insuffcient oxygen, producing carbon monoxide as a toxic product

Question 4

Nitrogen oxides

Answer 4

Chemical. Oompounds produced when high temperatures cause nitrogen gas in the air to react with oxygen nitrogen oxides are toxic and can cause acid rain

Question 5

Particulate

Answer 5

Small solid particle given off from motor vehicles as a result of incomplete combustion of its fuel

Question 6

Bioleaching

Answer 6

A new technique that involves using bacteria to extract metals such as copper from low grade ores

Question 7

Blast furnace

Answer 7

The huge reaction vessel used in industry to ectract iron from its ore

Question 8

Life cycle assessment

Answer 8

Carried out to assess the environmental impact of products, processes or services at different stages in their life cycle.

Question 9

Non renewable

Answer 9

Something which cannot be replaced once it is used up

Question 10

Portable water

Answer 10

Water that is safe to drink

Question 11

Thermal decomposition

Answer 11

The breakdown of a compound by heating it