16, 17 & 18

Question 1

Ecosystem

Answer 1

Interaction of a community of living organisms (biotic) with the non-living (abiotic)

Question 2

Habitat

Answer 2

Area in which organism lives

Question 3

Community

Answer 3

Two or more different species.
Stable community where all the species and environmental factors are in balance.
Population sizes remain fairly constant.

Question 4

Population

Answer 4

Total number of organisms of one species

Question 5

Competition

Answer 5

Plants compete for light, space, water and mineral ions.

Animals complete for food, mates and territory

Question 6

Interdependence

Answer 6

Species depends on other species for food, shelter, pollination etc

Question 7

Adaptations

Answer 7

Feature for survival

Question 8

Biodiveristy

Answer 8

Variety of different species on Earth/within an ecosytem

Question 9

Biotic factors (4)

Answer 9

• Availability for food
• New predators
• Pathogens
• Species out-competing

Question 10

Abiotic factors (7)

Answer 10

• Light intensity
• Temperature
• Moisture
• Oxygen
• Wind
• Carbon dioxide
• Soil pH and mineral content

Question 11

Structural adaptations

Answer 11

Part of the body that helps the organism survive.

Eg. Polar bears have a thick layer of fat for insulation

Question 12

Functional adaptations

Answer 12

Body operates, helps keep the organism survive.

Eg. Camels do not sweat

Question 13

Behavioural adaptations

Answer 13

Behaviour that helps the organism survive.

Eg. Desert rats stay in their burrows during the hottest parts of the day.