九年级Unit4Topic2SectionC教学课件

1、Unit 4 Amazing Science Topic 2 Im excited about the things that will be discovered in the future. Section C What are you going to be when you grow up？ solar system Mars is the fourth planet from the sun in our solar system and is named after Mars, the Roman god of war. Mars the Roman god of war 太阳系太

2、阳系 罗马战神罗马战神 n. 风暴，暴风暴，暴(风风)雨雨 It is much smaller than the earth. Its diameter is 53% of the earths. 直径直径 During spring and summer, the strong storms can cover the whole surface of Mars. The gravity on its surface is about 40% as strong as it is on earth. 引力，重力引力，重力 Listen to 1a ,and mark T or F. _ 1

3、. Mars looks like a red ball. _ 2. The temperature on Mars is very high. _ 3. Mars is much larger than the earth. _ 4. Mars is too far away for us to reach. T F F F Watch 1a and answer the questions. (1) What does Mars look like? (2) How far is Mars from the sun? (3) Whats the temperature on Mars? R

4、ead 1a again and fill the table. Diameter Color Shape Climate Gravity Distance from the sun 53% as wide as that of the earth red and orangea ball during spring and summer: strong storms temperature: between- 138and 28 about two-fifths as strong as it is on earth about 228 million kilometers 1. Its d

5、iameter is 53% as wide as that of the earth.它的直径是地球直径的它的直径是地球直径的53%。 2. The gravity on the surface of Mars is about two-fifths as strong as it is on earth.火星表面火星表面 的引力大约是地球引力的五分之二。的引力大约是地球引力的五分之二。 倍数倍数(分数分数)+ as +adj.+as 的的几倍几倍 3. Mars goes around the sun at a distance of about 228 million kilometer

6、s.火星在距太阳约火星在距太阳约 228 000 000千米处环绕着太阳转。千米处环绕着太阳转。 at a distance of 有有 距离距离 4. Scientists are still searching for more information about Mars.科学家们正在对火星进行更多的探索。 search for :表示没有“被搜索的对象” 只有“寻找 的目标” 。如： All night they searched for the lost boy. search for表示搜查某一对象的目的是要找到什么, 强调有具体的目标。如： She searched many s

7、hops for Jims gift. search 意为“在搜查”或“搜身”, 是个及物动 词，后面直接跟“被搜查的对象”。如： Mr.Smith searched every room in the house. Discuss the crazy questions with your partner and state your reasons. 1. Does Mars have a good climate for plants? 2. Is Mars a useful place to dry fruit? 3. Is Mars a good place for human be

8、ings to live? 4. Is Mars a comfortable place for heavy people? Key words Mars, fourth, be named after, diameter, as wide as, at a distance of, tell, because, bright red, ball, storms, gravity, temperature, oxygen, eight months, closest to, searching for Retell 1a Summary We learn: 1. Some words: storm, weigh, journey 2. S