LevelChapterLessonSection 2210Science 21. A flood happens when dry land too much water. 22. Floods can cause animals their habitats. 23. rain, rivers and lakes dry up. 24. Droughts can to living things. 1. disease2. flood 3. storm4. cause 5. heavy rain(s)6. habitat 7. survive8. wildfire 9. grassland10. pollute 11. entire12. eventually 13. natural disaster14. spread 15. catch a disease16. dry up 17. be covered with18. do harm to ~ 19. be struck by lightning20. be destroyed Science ▶ Phrase Check ▶ Word Check ☞ Choose the correct word or phrase for each blank. do harm, to lose, is covered with, without ☞ Write the meanings of the words.

LevelChapterLessonSection 2210Science How Do Environments Change? Environments can be changed in many ways. Natural disasters and diseases can change an environment. A flood is one type of natural disaster. A flood happens when dry land is covered with too much water. Heavy rains and other storms can cause a flood. Floods change an environment by washing away soil and plants. They can cause animals to lose their habitats. A drought is another type of natural disaster. It happens when there is no rain for a long time. Without rain, rivers and lakes dry up. Soil also dries out. Living things need water to survive. So droughts can do harm to living things. Droughts can lead to wildfires. If a dry part of a forest or grassland is struck by lightning, a wildfire can start. Wildfires harm plants and the habitats of many animals. Smoke from the fires pollutes the air. Environments can also be changed by diseases. Many things, such as bacteria, mold, and mildew, can cause diseases. Some diseases spread easily and harm many living things. An entire forest, for example, may eventually be destroyed if one tree catches a disease Science ▶ Reading Comprehension Ⅰ ☞ Choose the best answer based on the article. 25. Which were the most important article elements? ①. Natural disasters/a flood/a drought/a wildfire ②. Habitats/plants/rain/grassland ③. bacteria/mold/mildew/diseases ④. rivers/living things/lightning/air pollution 26. What could lead to wildfires? ①. Bacteria and mold ②. Heavy rains ③. A wet part of a forest ④. Lightening strikes 27. The word 'disasters' could be replaced with _____. ①. calamities ②. events ③. occasions ④. diseases 28. _____ and _____ can cause to Natural disasters. ①. Living things - Soil ②. Storms - disease ③. Trees - disease ④. Floods - animals

LevelChapterLessonSection 2210Science Science ▶ Reading Comprehension Ⅱ ☞ Write True(T) or False(F). How Do Environments Change? Environments can be changed in many ways. Natural disasters and diseases can change an environment. A flood is one type of natural disaster. A flood happens when dry land is covered with too much water. Heavy rains and other storms can cause a flood. Floods change an environment by washing away soil and plants. They can cause animals to lose their habitats. A drought is another type of natural disaster. It happens when there is no rain for a long time. Without rain, rivers and lakes dry up. Soil also dries out. Living things need water to survive. So droughts can do harm to living things. Droughts can lead to wildfires. If a dry part of a forest or grassland is struck by lightning, a wildfire can start. Wildfires harm plants and the habitats of many animals. Smoke from the fires pollutes the air. Environments can also be changed by diseases. Many things, such as bacteria, mold, and mildew, can cause diseases. Some diseases spread easily and harm many living things. An entire forest, for example, may eventually be destroyed if one tree catches a disease. 29. Animal's habitats can be destroyed by floods. _____ 30. Lakes will dry up if there is no rain for a long time. _____

LevelChapterLessonSection 2210Science Science ▶ Phrase Check ▶ Word Check ☞ Choose the correct word or phrase for each blank. do harm, to lose, is covered with, without ☞ Write the meanings of the words. 21. A flood happens when dry land is covered with too much water. 22. Floods can cause animals to lose their habitats. 23. Without rain, rivers and lakes dry up. 24. Droughts can do harm to living things. 1. disease [ 질병, 병 ]2. flood [ 홍수 ] 3. storm [ 폭풍 ]4. cause [~ 이 생기게 하다, ~ 의 원인이 되다 ] 5. heavy rain(s) [ 폭우 ]6. habitat [ 서식지 ] 7. survive [ 생존하다, 살아남다 ]8. wildfire [ 산불 ] 9. grassland [ 초원 ]10. pollute [ 오염시키다 ] 11. entire [ 전체의 ]12. eventually [ 결국 ] 13. natural disaster [ 파괴하다 ]14. spread [ 퍼지다 ] 15. catch a disease [ 병에 걸리다 ]16. dry up [ 바싹 마르다 ] 17. be covered with [~ 으로 덮이다 ]18. do harm to ~ [~ 에 해를 입히다 ] 19. be struck by lightning [ 벼락을 맞다 ]20. be destroyed [ 파괴되다 ]

LevelChapterLessonSection 2210Science How Do Environments Change? Environments can be changed in many ways. Natural disasters and diseases can change an environment. A flood is one type of natural disaster. A flood happens when dry land is covered with too much water. Heavy rains and other storms can cause a flood. Floods change an environment by washing away soil and plants. They can cause animals to lose their habitats. A drought is another type of natural disaster. It happens when there is no rain for a long time. Without rain, rivers and lakes dry up. Soil also dries out. Living things need water to survive. So droughts can do harm to living things. Droughts can lead to wildfires. If a dry part of a forest or grassland is struck by lightning, a wildfire can start. Wildfires harm plants and the habitats of many animals. Smoke from the fires pollutes the air. Environments can also be changed by diseases. Many things, such as bacteria, mold, and mildew, can cause diseases. Some diseases spread easily and harm many living things. An entire forest, for example, may eventually be destroyed if one tree catches a disease Science ▶ Reading Comprehension Ⅰ ☞ Choose the best answer based on the article. 25. Which were the most important article elements? [1] ①. Natural disasters/a flood/a drought/a wildfire ②. Habitats/plants/rain/grassland ③. bacteria/mold/mildew/diseases ④. rivers/living things/lightning/air pollution 26. What could lead to wildfires? [4] ①. Bacteria and mold ②. Heavy rains ③. A wet part of a forest ④. Lightening strikes 27. The word 'disasters' could be replaced with _____. [1] ①. calamities ②. events ③. occasions ④. diseases 28. _____ and _____ can cause to Natural disasters. [2] ①. Living things - Soil ②. Storms - disease ③. Trees - disease ④. Floods - animals

LevelChapterLessonSection 2210Science Science ▶ Reading Comprehension Ⅱ ☞ Write True(T) or False(F). How Do Environments Change? Environments can be changed in many ways. Natural disasters and diseases can change an environment. A flood is one type of natural disaster. A flood happens when dry land is covered with too much water. Heavy rains and other storms can cause a flood. Floods change an environment by washing away soil and plants. They can cause animals to lose their habitats. A drought is another type of natural disaster. It happens when there is no rain for a long time. Without rain, rivers and lakes dry up. Soil also dries out. Living things need water to survive. So droughts can do harm to living things. Droughts can lead to wildfires. If a dry part of a forest or grassland is struck by lightning, a wildfire can start. Wildfires harm plants and the habitats of many animals. Smoke from the fires pollutes the air. Environments can also be changed by diseases. Many things, such as bacteria, mold, and mildew, can cause diseases. Some diseases spread easily and harm many living things. An entire forest, for example, may eventually be destroyed if one tree catches a disease. 29. Animal's habitats can be destroyed by floods. [T] 30. Lakes will dry up if there is no rain for a long time. [T]