1、Unit13The Water Planet1.What is the chemical structure of water?A.Carbon&Oxygen.B.Nitrogen&Oxygen.C.Hydrogen&Oxygen.2.What is the freezing point of water?A.0 B.100 C.03.What state is water in at room temperature?A.Liquid B.Solid C.Gas4.An ice cube can float on water.It has something to do with water
2、s.A.salinity B.density C.heat capacity5.The coastal areas are often neither too hot nor too cold.Its because of waters.A.salinity B.density C.high heat capacityFind the definition of an estuaryAn estuary is the body of water _ a river meets the ocean.Salt water from the ocean and fresh water from th
3、e river mix _ in an estuary.This _ of fresh and salt water createsa unique environment _ with life of all kindsa zone between the land and sea.wheretogethermixingfilledGreat places for natures young animals.Clean our water by absorbing nutrients and pollutants from water coming from inland sources;P
4、rovide both recreation and education for human beings.What kinds of function of estuaries have been mentioned in the passage?(1)Why are estuaries such good places for natures young one?(2)What does density mean in this passage?(3)How do estuaries affect the water that passes through them?(4)Why are
5、estuaries more sensitive to pollution than other areas?(5)Why are estuaries important to human beings?1.Why are estuaries such good places for natures young ones?In estuaries,animals can enjoy all the benefits of the oceans without having to face many of its dangers.Tides provide energy for the ecos
6、ystems,but estuaries are protected from waves and storms by islands,mud or sand.Nutrients from both the land and the ocean arrive in estuaries.Read the passage and answer the following questions.4.Why are estuaries more sensitive to pollution than other areas?Because estuaries act as filters(过滤器),ma
7、ny pollutants end up in them.2.What does density mean in this passage?It means the number of species per area.3.How do you estuaries affect the water that passes through them?They absorb nutrients and pollutants from water coming inland sources,thus cleaning our water.5.Why are estuaries important t
8、o human beings?Estuaries provide both recreation and education for human beings.People can fish,swim and have fun on the beach.Scientists and students have endless opportunities to study a variety of life in the habitat.Estuaries also contribute to the economy through tourism and fishing.1.The passa
9、ge mainly tells us_.A.how the estuaries form naturallyB.why so many cities and towns are built around estuariesC.the living things in the estuariesD.the characters of estuaries and their great effect on living things and human beings 2.The word“habitat”in Para.2 of the passage probably means_.A.生物B.
10、栖息地C.密度D.界线3.Its not stated but we can infer from Passage that_.A.estuaries are the homes of thousands of animals and plantsB.estuaries are more or less polluted by the water coming from inland sources at presentC.they play an important part in the worlds climateD.estuaries provide both recreation a
11、nd education for human beings2.An estuary is the body of water where a river meets the ocean.河口是河流和海洋交汇的地方。This is the place where I was born.这就是我出生的地方。She would like to live in a country where it never snows.她喜欢住在不下雪的国家。定语从句where还可以引导地点状语从句、表语从句、宾语从句、主语从句等。I wonder where they will take us.我想知道他们要带我
12、们去哪儿。This is where I live.这就是我住的地方。Sit where I can see you.坐在我能看见你的地方。Where we should go hasnt been decided yet.我们去哪儿还没定下来。宾语从句表语从句地点状语从句主语从句 This mixing of fresh and salt water creates a unique environment filled with life of all kindsa zone between the land and sea.淡水和盐水的混合创造了一个富含各种生物的奇特的环境陆地向海洋的过
13、渡区域。1.a zone between the land and sea,是前面a unique environment的同位语。2.句中filled with life of all kinds是过去分词短语作后置定语，相当于which is filled with life of all kinds。5.it,one,that,one 可以替代前面出现过的可数名词(人/物),一般是同名异物,其复数形式是ones.-Which is your jacket?-The white one.it 也可以代替前面出现过的单数名词,指特定对象,一般是同名同物.-Do you want this b
14、ox?-Yes,I want it.that 通常用来替代不可数名词,具有特定意义.The population of China is larger than that of Japan.Ex:The cost of oil is less than _ of gas.Do you want the pan?Yes,I want _.He gave me three apples,one red _ and two green _.Do you want a pan?Yes,I want _.thatitoneoneones 7.Tides provide energy for the ec
15、osystems,but estuaries are protected from waves and storms by islands,mud or sand.海潮为生态系统提供能量，河口则由于受到岛屿和泥沙的保护而免受海浪和风暴的影响。provide sb.with sth.provide sth.for sb为提供 The company provided the employees with a cellphone.Parents provide food and clothes for their children.offer sb.sth.;offer sth.to sb.;of
16、fer to do sth.;supply sb.with sth.;supply sth.to(for)sb.Most of us enjoy fishing,swimming and having fun on the beach,and scientists and students have endless opportunities to study a variety of life in the habitat.我们中很多人喜欢钓鱼，游泳，在海岸上玩耍。科学家和学生有无穷无尽的机会去研究那里的各种各样的生物。1.fishing,swimming,having fun 同为enjo
17、y的宾语。2.to study a variety of life in the habitat是不定式作后置定语。8.Estuaries also contribute to the economy through tourism and fishing.通过旅游业和捕鱼业河口还对经济作出了巨大的贡献。contribute to 有助于,促成；捐给，适度的运动有益健康。A proper amount of exercise contributes togood health.她在这次讨论中提出了很多好的意见。She contributed a lot of good ideas to the discussion.
