BIOLOGY - food chains and webs

Question 1

What do food chains show?

Answer 1

Different organisms and which organisms eat other organisms.

Question 2

What do food chains start with?

Answer 2

A producer

Question 3

What is a producer?

Answer 3

An organism that makes food

Question 4

Green plants are usually …?

Answer 4

Producers

Question 5

How do plants make their food?

Answer 5

Using photosynthesis

Question 6

What do food chains end with?

Answer 6

A consumer

Question 7

What is a consumer?

Answer 7

An animal which eats plants or other animals

Question 8

What do the arrows point to in the food chain?

Answer 8

The arrows point to the organism doing the eating

eg;
Cow -> Human
Producer Consumer

Question 9

What is a herbivore?

Answer 9

An organism that only eats plants

Question 10

What is a carnivore?

Answer 10

An organism that only eat meat

Question 11

What is an omnivore?

Answer 11

An organism that eat both plants and meat

Question 12

What is a primary consumer?

Answer 12

The first organism to eat a producer

Question 13

What is a secondary consumer?

Answer 13

The organism that eats the primary consumer

Question 14

What is passed onto the consumers?

Answer 14

Energy

Question 15

What is a predator?

Answer 15

Predators are that hunt other animals ( prey)

Question 16

What is prey?

Answer 16

An animal that is hunted by a predator

Question 17

What (as well as energy) can be passed along the food chain?

Answer 17

Toxic materials

Question 18

Name two toxic materials that have been known to be passed along food chains.

Answer 18

Mercury and DDT

Question 19

How is mercury inserted into the food chain?

Answer 19

Plant plankton absorb mercury compounds and when they get eaten, the mercury is passed onto the consumer.

Question 20

What happens to the mercury concentration going higher into the food chain?

Answer 20

The concentration gets higher

Question 21

What do some toxic materials do in early stages?

Answer 21

Break down into harmful substance

Question 22

What is a persistent substance?

Answer 22

A substance that doesn’t break down meaning if it is passed on in the food chain if consumed.

Question 23

What type of toxic materials are mercury and DDT?

Answer 23

Persistant toxic materials.

Question 24

What was mercury used in?

Answer 24

Pesticides and special paint used to stop barnacles from growing on ships

Question 25

What happens if mercury is consumed?

Answer 25

The mercury attacks the nervous system and reproductive system of mammals including humans.

Question 26

What is the symbol for mercury?

Answer 26

Hg

Question 27

What happens if a human consumes mercury?

Answer 27

They get mercury poisoning

Question 28

What is DDT?

Answer 28

An insecticide

Question 29

How is DDT passed on and inserted into the food chain?

Answer 29

By birds.

Question 30

What happens to the birds after consuming DDT?

Answer 30

The DDT can cause weakness in bird eggs, and lowers the population

Question 31

what is a food web?

Answer 31

when all the food chains in a habitat are joined together they form a food web