N4 Unit 3 Part A

Question 1

What is a biome?

Answer 1

A region of the planet which has a characteristic climate and organisms living within the region.

Question 2

Name two factors which can affect the distribution of a biome.

Answer 2

Temperature and rainfall

Question 3

Give two examples of land biomess.

Answer 3

Rainforest and tundra

Question 4

Give two examples of water biomes.

Answer 4

Freshwater and marine

Question 5

What is an ecosystem?

Answer 5

An ecosystem consists of all the organisms living in a particular habitat and the non-living components with which the organisms interact.

Question 6

What name is given to a diagram of interconnected food chains?

Answer 6

Food web

Question 7

What do the arrows in a food web represent?

Answer 7

The flow of energy

Question 8

What is a producer?

Answer 8

An organism which makes its own food

Question 9

What is a consumer?

Answer 9

An organism which eats other organisms for food

Question 10

Name three things animals and plants depend on each other for.

Answer 10

Food, shelter and pollination

Question 11

What is pollination?

Answer 11

The transfer of pollen from one plant to another

Question 12

What are biotic factors?

Answer 12

Living factors

Question 13

Give two examples of biotic factors.

Answer 13

Food availability and predation

Question 14

What is a predator?

Answer 14

An animal which hunts and kills another animal for food

Question 15

What is prey?

Answer 15

An animal that is killed and eaten by another animal

Question 16

Name two things animals compete for.

Answer 16

Food and territory

Question 17

Name two things plants compete for.

Answer 17

Water and space

Question 18

Name two pieces of equipment used to find out the distribution of an organism in a given habitat

Answer 18

Quadrats and pitfall traps

Question 19

What are quadrats used for?

Answer 19

Estimating the abundance of plants or slow-moving animals

Question 20

What has happened to the human population in the last hundred years?

Answer 20

It has increased dramatically

Question 21

Give two reasons for the dramatic increase in the human population.

Answer 21

Better healthcare and more efficient food production systems

Question 22

Give one consequence of human population growth.

Answer 22

Increased competition for space might mean species become extinct

Question 23

Define biodiversity.

Answer 23

How many different species are found in a particular area

Question 24

Name two human activities which affect biodiversity.

Answer 24

Acid rain and deforestation

Question 25

Describe how deforestation reduces biodiversity.

Answer 25

It causes loss of habitat so organisms have nowhere to live.

Question 26

List three natural hazards which reduce biodiversity.

Answer 26

Earthquakes, flooding and volcanic activity

Question 27

What is acid rain?

Answer 27

Rain that is unusually acidic

Question 28

Name two gases which can cause acid rain when released into the atmosphere.

Answer 28

Sulfur dioxide and nitrogen oxide

Question 29

How does acid rain effect animals living in ponds and lakes?

Answer 29

It alters the pH of the water and some animals can’t tolerate this.

Question 30

How does acid rain effect plants?

Answer 30

The leaves and roots of trees can be damaged by acid rain, making them less able to make food (photosynthesise) and absorb nutrients.

Question 31

What is climate change?

Answer 31

A long-term shift in the Earth's weather patterns and average temperatures

Question 32

Name three greenhouse gases.

Answer 32

Carbon dioxide, methane and water vapour

Question 33

Name one human activity which releases greenhouse gases.

Answer 33

Burning fossil fuels

Question 34

Name one organism which is effected by climate change.

Answer 34

Polar bear

Question 35

What is conservation?

Answer 35

The protection of natural resources and the environment.

Question 36

Which conservation strategy protects plants and animals in their natural environment.

Answer 36

Nature reserves

Question 37

Which conservation strategy protects animals in artificial environments, use captive breeding programmes to try to increase the population of endangered species

Answer 37

Zoos, wildlife parks and botanic gardens

Question 38

Which conservation strategy makes it illegal to hunt certain species; wardens protect the animals from poachers.

Answer 38

Hunting laws

Question 39

Which conservation strategy places a limit on the number of an endangered species of fish that can be caught.

Answer 39

Fishing quotas