We Need Insects!

Transcription

We Need Insects!

Building Background What Are Insects?Vocabulary Insects, The Earth Needs Insects & Insects Help Plants GrowWhat do you already know about ‘insects’? Check up your priorknowledge about insects.Read the definitions and write the words from the Word Bank.[ Word Bank ]Write about insects’ body parts.Write about insects’ life cycle.seedpestpollenharmful1. everything in the physical world such as wild plants, animalsand the weathernature2. the sweet liquid that bees collect from flowersnectarWrite names of helpful insects for us.Write names of harmful insects to us.3. a small animal or insect that destroys crops or food suppliespest4. a small, hard object produced by plants, from which a newplant of the same kind growsseedharmful5. causing or likely to cause harm6. a fine powder produced by flowers, which is carried by thewind or by insectsWrite a paragraph about ‘insects’ using the information from thechart that you completed above.nectarnaturepollenCircle the synonym of the underlined words.1. Many insects are food for other living things, while some insects keep the soil healthy.① bite② stop③ prevent④ maintain③ good④ eat2. Some pests damage plants.① hurt2Four Corners Workbook② helpWe Need Insects3

Comprehension Insects & The Earth Needs InsectsRead the paragraph and circle the answer.Comprehension Insects Help Plants GrowCircle the answer.1. Which insects fly from flower to flower?Insects are an important part of nature. Some insects help plants growand some eat other harmful insects. Many insects are food for otherliving things, while some insects keep the soil healthy. Others help makethings we use. .① mosquitoes② aphids③ butterflies④ ants2. Why do some insects fly from flower to flower?1. What is the paragraph about?① insects② nature③ living things④ the Earth2. What is the main idea of this paragraph?① to build their houses② to lay their eggs③ to eat fruits④ to spread pollen3. What is the powder on flower?① seed② pest③ pollen④ nectar① Many insects are very harmful.② Insects are an important part of nature.③ Some animals eat insects.4. How do insects help plants grow?① Insects move the body of a grasshopper.④ We don’t eat insects.② Insects spread pollen while they fly from flower to flower.③ Insects sip nectar.3. What sentence might fit in the blank?④ Insects give plants water and nutrients.① Insects are useless.② We like insects.③ We have to eat insects.④ We need insects.4. What might the next paragraph be about?Reread Book pages 6 to 7 and write about how insects spread pollen.① why insects bite humans② harmful insects and helpful insects③ when living things eat insectsWhen insects land on flower, pollen sticks to their bodies.When insects fly from to flower, they spread the pollen.④ why people eat insects4Four Corners WorkbookWe Need Insects5

Vocabulary Helpful Insects & Insects Help the SoilComprehension Helpful Insects (1)Complete the word puzzle using the Word Bank.❶ap h itrac1. What are the insects called that are helpful to humans?❷d❻ate amlarvab❹u ge❺tw❼e s toreildas t ep❸❽Circle the answer.a① beneficial insects② harmful insects③ ladybirds④ aphids2. Which is true about predators?① Most harmful insects are predators.② Most farmers do not like predators.③ Mosquitoes are great predators.④ Many beneficial insects are predators.Look at the picture and circle the answer.orAcrossDown1. a type of small insect that feeds on the1. to make someone interested injuices of plantssomething3. the food that you eat2. to cause physical harm to something or5. substances that are left after people haveused somethingto part of someone's body4. a young insect with a soft tube-shaped6. a small animal or insect that destroyscrops or food suppliesbody1. The praying mantis sees the fly.2. It pounces andthe fly.6. an animal that kills and eats other8. a small insectanimals7. the top layer of the earth in which plantsgrow1. What does the picture show us?① why a predator catches food② how a predator catches food③ when a predator catches food④ who sees a predator[ Word Bank ]wastemeal6Four Corners 2. Which word goes in the blank?① catches② spreads③ flies④ eatsWe Need Insects7

Comprehension Helpful Insects (2)Circle the answer.Comprehension Insects Help the SoilCircle the answer.1. Why do farmers like to have predator insects in their fields?1. What animals eat dead plants, animals and animal waste?① Because they do not need to use chemicals to kill pests.① predators② aphids② Because predator insects lay a lot of eggs.③ decomposers④ parasites③ Because they do not need to use fertilizers.④ Because they spread a lot of pollen.2. Which animals eat insects?2. What animals live in or on another living things?① predators② parasites③ nectar④ aphids① tigers and lions② cats and dogs③ hares and rabbits④ bats and frogsRead the paragraph and circle the answer.Write answers in your own words.Animals are not the only ones who eat insects. People do, too. In manyplaces people feast on all kinds of insects. Many of these insectspeople with healthy food.1. Reread Book page 10 and write about how parasites can kill harmful insects.They lay eggs on or in pest insects.The eggs hatch into larvae or young insects.As larvae grow, they eat the pest insect.2. Reread Book page 11 and write about how farmers can bring beneficial insects to theirgardens.They attract the beneficial insects by growing certainplants and flowers that the insects would like.8Four Corners Workbook1. What is the main idea of the paragraph?① Many animals eat insects.② People do not eat insects.③ People also eat insects.④ Animals are not predators.2. What word goes in the blank?① increase② make③ prepare④ provideWe Need Insects9

Vocabulary Things We Use, Insects Are Beautiful & We Need InsectsWrite the words from the Word Bank under the correct category.Comprehension Things We UseWrite the correct words from the Word Bank to match the pictures.[ Word Bank ]gardenamazingsilkbeered dyesilkwormcochineal insectbeeswaxhoneybeautifulProducts That Come From InsectsInsectWords Related toInsectsProducts That Come fromInsectsWrite 3 words.Write 4 words.cochineal insectbeesilkwormsilkred dyebee waxhoneyWords Related toDescribing SomethingWord Related toa PlaceWrite 3 words.Write 3 xsilkSikwormCochinealinsectsred dye[ Word Bank ]silkhoney10Four Corners Workbookred dyebeeswaxsilkwormcochineal insectbeeWe Need Insects11

Comprehension Insects Are Beautiful & We Need InsectsRead the paragraph and circle the answer.Many people think insects are beautiful. Some people collect them. Thedifferent colors, shapes and sizes of insects are amazing. Many zoos havegardens where people can see the beauty of insects.Final Test (1)1. Which insect is a pest?① mosquito② butterfly③ ladybird④ bee2. Which is true about pests?① They eat at least 50 aphides a day.② They are helpful to people, plants and other animals.1. What is the best title for the paragraph?③ They are harmful to people, plants and other animals.① The Earth Needs Insects④ They spread pollen by flying from flower to flower.② Insects Are Beautiful③ Insects Help Plants Grow3. Why do we need pests?④ Predators and Parasites① Because pests bite humans and animals.② Because pests are often food for helpful insects.2. What is the synonym of the underlined word?① scary② ugly③ surprising④ certain③ Because pests are very helpful to plants.④ Because pests damage plants.4. Which insects are helpful to plants?Reread Book page 22 and write four things about ‘how the life wouldbe like without insects’ in your own words.(1) Some plants might not produce many fruits andvegetables. Many plants(2) Many plants might be damaged or destroyed.(3) Dead plants and animals might stay on the ground longer.(4) People wouldn’t have many things that we use everyday.12Four Corners Workbook① bees② mosquitoes③ pests④ aphids5. Why are ladybirds helpful to plants?① Because they eat praying mantis and flies.② Because they eat sawflies.③ Because they eat mosquitoes that bite humans.④ Because they eat aphides that can damage a whole plant.We Need Insects13

Grammar Nouns and Verbs (1)Final Test (2)Look at the picture and circle the answer.Circle the correct verb to complete each sentence.1. A cowThe ichneumon wasp lays its eggs insawfly larvae.ichneumon wasp① drink2. Chickssawfly larvaThe wasp uses along, thin tube topush an egg into thelarva in the wood.water.① swim3. The pigs① sits4. One cat① sleep② runs③ drinks④ run② swims③ run④ runs③ is④ eat③ sleeps④ sitaway.in mud.② sitin the kitchen.② are1. What does the picture show us?① when the ichneumon wasp lays its eggs in sawfly larva② why the ichneumon wasp lays its eggs in sawfly larva③ how the ichneumon wasp lays its eggs in sawfly larva④ how long the ichneumon wasp lays its eggs in sawfly larvaCircle the correct verb to complete each sentence.2. Why are sawflies harmful to plants?① Because they eat aphids in the trees.1. The silkworm (make makes) a cocoon of silk.② Because they eat wood and damage trees.③ Because they bite plants.2. Some insects (help helps) plants grow and some eat other harmful insects.④ Because they spread pollen from flower to flower.3. Plants (need needs) pollen to make seeds which grow into new plants.3. Write about how the ichneumon wasp lays its eggs in your own words.The ichneumon wasp uses a long, thin tube topush an egg into the lava in the wood.14Four Corners Workbook4. The wasp (use uses) a long, thin tube to push an egg into the larva in the wood.We Need Insects15

Grammar Pronouns and Verbs (2)Writing Products That Come from InsectsCircle the correct verb to complete each sentence.1. Theyto school.① drink2. SheName② walk③ drinks④ walks② runs③ bring④ run③ write④ weara ball.① brings3. HeChoose a product that comes from insects and complete a fact fileabout it.Where does it come from?a backpack.① writes② wearsWhat do you use it for?4. Itfor the children.① stop② give③ stops④ givesWhat is an interesting fact about that insect?Circle the correct verb to complete each sentence.1. When they (land lands) on a flower, pollen sticks to their bodies.Write a paragraph using the information from the chart that youcompleted above.2. As the larvae grow, they (eat eats) the pest insects.3. They (attract attracts) the insects by growing certain plants.4. The silk protects the silkworm while it (grow grows).16Four Corners WorkbookWe Need Insects17

Listening PracticeMEMOListen to the sentence and fill in the blanks.Insects are an important part of nature.1.grow2. We need insects to help plants .lay3. Many parasiteseggs on or in pest insects.meal for many .animals4. Insects are part of a day’ssilkworms we would not have silk.5. If it were not for ,Listen to the paragraph and fill in the blanks.harmful insects. Many insects6. Some insects help plants grow and some eat otherwhile some insects keep the soil .healthyare food for other living things,need insects.Others help make things we use. WeFarmers like to have certainpredator insects in their fields. If they do, they do7.pests Chemicalsnot have to use as many chemicals to kill .used in farming canbe harmful to people and animals.beneficial insects have large appetites. Lacewinglarvae can eat8. Somehundreds of aphids in a day. They also like caterpillarsand insect eggs. A hover flylarva can eat 50 aphids a day, orupto400 in its lifetime.assassin bug is a hunter. Assassin bugs feed on many differentAn insect called theinsects.only ones who eat insects. People do, too. In many places9. Animals are not thefeast on all kinds of insects.Many of these insectsprovidepeoplefoodpeople with healthy .without insects? Some plants might not produceas10. What would life bemany fruits and vegetables. Many plants might bedamaged or .destroyedlonger Some animals mightDead plants and animals might stay on the ground .People wouldn’t have many of the things we use everyneed to find other food.day.18Four Corners WorkbookLet’s Play19

Four CornersWORKBOOKWe Need Insects!Publisher Jae-yoon ChungManaging Director Hannah LeeSenior Editor Jung-ah KimProject Editor Reese JiWritten by Jeong Hee ChoiProofread by Alwin G. FontenotRecorded by Yeasung Media TechIllustrated by Donghyun LeeDesigned by DOD DesignPrinted by POD KOREACopyright 2008 by Language World Co., Ltd.All rights reserved. No part of this publication may be reproduced or distributed in any formor by any means, or stored in a database or retrieval system,without the prior written consent of Language World Co., Ltd., including, but not limited to,in any network or other electronic storage or transmission, or broadcast for distance learning.www.lwbooks.co.krFirst Edition in 2008ISBN 978-89-256-0026-0

6 I Four Corners Workbook Comprehension Helpful Insects (1) Circle the answer. Look at the picture and circle the answer. We Need Insects 7 Across 1. a type of small insect that feeds on the juices of plants 3. the food that you eat 5. substances that are left after people have used something 6. a small animal or insect that destroys crops or .