Food chain

in Sea

Human often make changes in food chains. Then they find that one change causes other changes. That was what happened when hunters killed nearly all the Pacific sea otters.

1 -What is the main idea of this text?

2- How can human make changes in the food chain?

3- Underlined the past tense in this paragraph?

was is

happened happen

killed kill

What is the past tense of “ find? ”

found

What part of speech “ hunter” is?

Hunt ( verb) + er ( suffix) = hunter (noun)

What is the meaning of “ hunter?”Someone who hunt animal.

The otters lived off the west coast of North America. They lived in beds of giant seaweed, called Kelp. Every year thousands of otters were killed for their fur. By the early 1900s almost none were left. But as the otters disappeared, so did beds of kelp. And so did eagles, harbor seals, and fish . What had happened? The answer lay in the kelp.

Giant seaweed ( kelp)

Otter

Why are otters killed ?They are killed for their fur.

What would happen if all otters were killed?

Can you find a food chain in thisparagraph?

Kelp

Fish

Harbor seal Eagle

Make a question

The otters lived off the course of North America.

Where did the otters live? what is the past of “ Lay”? Laid

what is the present of “ left”? Leave

Give a word which means “ very big”

Giant

What does the word” disappear mean?

A- Not seen B- Not found C- Not start

Kelp is a green plant at starts of many food chains. It is eaten by tiny animals that are eaten by bigger animals that are eaten by fish. The fish are food for eagles and seals, as well as people.

Kelp is also eaten by spiny animals called sea urchins. In eating, they may cut off stems at the seafloor. The kelp then floats away.

“Tiny” means? A- very big B- very small

Can you find a food chain

Sea urchins are one of the foods otters like best. But when hunter killed the otters, there was no one to eat the urchins. The urchins destroyed the kelp beds.

Once the hunting stopped, the otters made a comeback. They ate sea urchins, and the kelp began to do well. When the kelp did well, the fish came back and so did the eagles, seals and fisherman.

What does the sentence mean?

The otters made a come back

3-Making Connections Work With a partner.

Complete the chart below.

ln the Ocean. On land

1 -Name an animal at the top of the food\d chain

2.Give an example of a plant at the bottom of the food cahin

3 .Name an animal that eats only plants.

4 .Name an animal that eats other animals.

Man Eagle

Fox Lion Whale Shark

grass Green plants

Kelp Sea weed

Sheep

cow Sea

urchins fish

Snake

tiger Seal

Big fish

4 .Expanding Your Vocabulary

food chains in the ocean are hard to study because the plants and animals live underwater. Match the words and phrases with each item in

the picture.

1- ………..kelp 2-- ….e…… mackerel 3-- ………….octopus 4- -…………. Killer whale 5- ………..red algae 6- - …………..krill

a

kci j

7- …………….squid 8- ……………..tuna 9-…..h ………anchovy 10-……………seal 11- ……g …..sea lion 12-……f …..herring

ldb

Kelp

Sea otters

Sea Urchins