Chapter 7

Question 1

Algal Bloom

Answer 1

A rapid increase in the population of algae or other micro-organisms at the surface of a water body, that blocks sunlight from entering.

Question 2

Anoxic

Answer 2

Completely devoid of oxygen

Question 3

Biological Control

Answer 3

A method of pest control in which another species is introduced that can control the population of the pest species

Question 4

Biomagnification

Answer 4

The sequence of processes in an ecosystem by which higher concentrations of a particular non-biodegradable chemical accumulate in the tissues of organisms higher up the trophic levels

Question 5

Bottom trawling

Answer 5

A destructive metho of fishing which invloves dragging a large net across the seafloor

Question 6

Bush corridors

Answer 6

The strips of regenerated land between isolated habitats that reconnect subpopulations, returning habitat to populations and enabling subpopulations to interbreed

Question 7

By-catch

Answer 7

The unwanted fish and other marine creatures trapped by commercial fishing nets during fishing

Question 8

Captive-breed-for-release

Answer 8

Describes a program designed to provide additional animals for release into the wild to establish new populations or to augment existing ones

Question 9

Chemical Control

Answer 9

A chemical, such as a pesticide or poison, that is used to control the population of a pest or invasive species

Question 10

Climate

Answer 10

The average, long-term, predictable atmospheric weather conditions at a site over a long period of time

Question 11

Climate change

Answer 11

A significant change in the global climate that can be identified by changes in the average.

Question 12

Culling

Answer 12

A conservation management strategy involving the killing and removal of individuals in a population in order to reduce the negative impact the animal is having on an ecosystem

Question 12

Culling

Answer 12

A conservation management strategy involving the killing and removal of individuals in a population in order to reduce the negative impact the animal is having on an ecosystem

Question 13

Deforestation

Answer 13

The permanent removal of standing forests

Question 14

Enhanced greenhouse effect

Answer 14

The intensified version of the natural greenhouse effect.
Caused by:
Increased of greenhouse gases in the atmosphere from human activity

Question 15

Eutrophication

Answer 15

The process that occurs when excess nutrients particularly phosphorus, enter a body of water and become highly concentrated, leading to excess growth of organisms such as algae,

Question 16

Fossil Fuels

Answer 16

Natural energy sources, formed from fossilised living things

Question 17

Fragmentation

Answer 17

The separation of some parts of the habitat of an ecosystem into isolated sections

Question 18

Global Warming

Answer 18

The steady rise in global average temperature in recent decades

Question 19

Greenhouse effect

Answer 19

The insulating effect of greenhouse gases in the atmosphere, which prevent some of the solar radiation from escaping Earth’s atmosphere

Question 20

Greenhouse gases

Answer 20

The gases that trap heat from the sun and keep Earth's surface warm
Carbon dioxide
Nitrous oxide
Water 
Methane