Name: hood Aatef Class:11-A-1

1. Name: hood Aatef Class:11-A-1

2. What is the lesson about?

3. Humans often make changes in food chains. Then they find that one change causes other changes. That was what happened when hunterskilled nearly all the pacific sea otters.

4. What is the main idea? How can human make changes in the food chain? What do you think that may happen if the wren disappeared from the food chain? .

5. Underline the past tense What is the past tense of “ find” ? Found What part of speech “ hunter” is? Hunt ( verb) + er ( suffix) = hunter (noun)

6. 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.

7. Otter

8. Seaweed kelp

9. Why are otters killed ? They are killed for their fur. What would happen if all otters were killed?

10. Harbor seal Eagle Fish Can you find a food chain in this paragraph? Kelp

11. Make a question The otters lived off the course of North America Where did the otters live? Laid what is the past of “ Lay”? what is the present of “ left”? Leave

12. Give a word which means “ very big” Giant What does the word” disappear mean? A- Not seen B- Not found C- Not start

13. Kelp is a green plant at the start 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.

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

15. Can you find a food chain

16. 4 Kelp is also eaten by spiny animals called sea urchins. In eating, they may cut off stems on the ocean floor. The kelp then floats away. 5 sea urchins are one of the foods otters like best. But when hunters killed the otters, there was no one to eat the urchins. The urchins destroyed the kelp beds.

17. Spiny

18. Sea Urchin

19. Answer by saying “ Y” or “ N” N The kelp eats sea urchins The kelp floats after being eaten Y Y Otters eat sea urchins

21. 6 Once the hunting stopped, the otters made a come back. 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 fishermen

22. What does the sentence mean? The otters made a come back

23. 3-Making ConnectionsWork With a partner. Complete the chart below.

24. Eagle Shark Man Whale Lion Fox Kelp grass Green plants Sea weed Sheep cow Sea urchins fish Seal Snake tiger Big fish

25. 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.

26. a 1- ………..kelp 2-- ….e…… mackerel 3-- ………….octopus 4- -…………. Killer whale 5- ………..red algae 6- - …………..krill k c i j

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