B8 Ecosystems

Question 1

What is a feeding relationship?

Answer 1

Which organisms eat each other

Question 2

Why do organisms eat each other

Answer 2

To get nutrients and energy for survival

Question 3

What diagrams do scientists use to show feeding relationships

Answer 3

Food chains

Question 4

What name is given to organisms that make their own food

Answer 4

Producers

Question 5

Where do producers get their money from

Answer 5

The sun

Question 6

In a food chain, what name is given to an organism that eats another organism

Answer 6

Consumer

Question 7

In a food chain, which direction do the arrows point

Answer 7

From the organism being eaten to the organism eating it

Question 8

In a food chain or web, why do the arrows point from the organism being eaten to the organism eating it

Answer 8

To show the flow of energy

Question 9

What is bioaccumulation

Answer 9

How toxic materials can build up in a food chain

Question 10

What is interdependence

Answer 10

How organisms depend on each other for survival

Question 11

What is a food web

Answer 11

A group of interconnected food chains

Question 12

What is the name given to organisms that eat animals

Answer 12

Predators

Question 13

What is the name given to organisms eaten by other organisms

Answer 13

Prey

Question 14

What happens to the number of prey if the number of predators increases

Answer 14

The number of prey decreases as more are eaten

Question 15

What happens to the number of predators if the number of prey decreases

Answer 15

The number of predators decreases as they starve

Question 16

What is a herbivore

Answer 16

An animal that eats plants

Question 17

What is a carnivore

Answer 17

An animal that eats other animals

Question 18

What is an omnivore

Answer 18

An animal that eats plants and animals

Question 19

What is the population of an organism

Answer 19

The number of that organism in a particular area

Question 20

What is an adaption

Answer 20

A way in which an organism suits its environment

Question 21

Why do polar bears have white fur

Answer 21

Camouflage, so they can hunt prey

Question 22

What adaptations does a polar bear have to stay warm in the arctic

Answer 22

Body fat,lots of fur and thick legs

Question 23

What is the purpose of a camel’s hump of fat

Answer 23

To release energy and make water

Question 24

Why do camels have long eyelashes

Answer 24

To stop the sand going in their eyes

Question 25

How is a cactus adapted to prevent water loss

Answer 25

Thick waxy layer and swollen stem instead of leaves

Question 26

Why does a cactus have spines

Answer 26

To stop it being eaten

Question 27

Why does a cactus have shallow but wide roots

Answer 27

To absorb as much rainwater as possible

Question 28

Why does a cactus have a succulent stem instead of leaves

Answer 28

To prevent water loss

Question 29

What happens during insect pollination

Answer 29

An insect carries pollen from one flower ot another

Question 30

What is the consequence of insect pollination

Answer 30

Fertilisation of the ovum by the pollen

Question 31

Why do insects fly from flower to flower

Answer 31

They are attracted to the flowers’ colour and nectar

Question 32

What can happen to a flower once it is pollinated

Answer 32

Ir grows a fruit or seed

Question 33

What insects are the most common pollinators

Answer 33

Bees

Question 34

What are the two factors causing bee numbers to drop

Answer 34

Use of pesticide. And loss of habitat

Question 35

What is the relationship between the number of bees and the number of flowers that can be pollinated

Answer 35

As the number of bees reduces, the number of flowers pollinated will reduce

Question 36

What is food security

Answer 36

The ability of all people to have enough food all the time

Question 37

What is a pesticide

Answer 37

A chemical that kills crop-eating insects

Question 38

Give three ways to help increase bee numbers

Answer 38

Do not spray pesticides Plant more flowers Let grass grow long