Unit 4 Amazing Science>Topic 2 I’m excited about the things that will be discovered in the future.

课件22张PPT。Unit 4 Amazing Science Topic 2 I’m excited about the things that will be discovered in the future. Section C What are you going to be when you grow up？Why?Do you know anything about Mars? solar system Mars is the fourth planet from the sun in our solar system and is named after Mars, the Roman god of war. Marsthe Roman god of war 被命名太阳系罗马战神 n. 风暴，暴(风)雨It is much smaller than the earth. Its diameter is 53% of the earth’s.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1a Read and understand. Look at the pictures and predict which statements are true about Mars. Then read the passage quickly and check the answers._____ 1. 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.TFFFListen to 1a and answer the questions. (1) What does Mars look like? It looks like a red and orange ball. (2) How far is Mars from the sun? It’s about 228 million kilometers away from the sun. (3) What’s the temperature on Mars? It is between -138℃and 28℃.1a Read and understand. 1. Its diameter is 53% as wide as that of the earth.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 的引力大约是地球引力的五分之二。 倍数(分数)+ as +adj.+as ……的几倍 3. Mars goes around the sun at a distance of about 228 million kilometers.火星在距太阳约 228 000 000千米处环绕着太阳转。 at a distance of …有 ……距离 Language Points 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 shops for Jim’s 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. Language Points 1b Read 1a again and write down the information about Mars. 53% as wide as that of the earth red and orangea ball during spring and summer: strong storms temperature: between-138℃and 28℃about two-fifths as strong as it is on earth about 228 million kilometers 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 forRetell 1a Mars, the _____ planet of the solar system, goes around the sun at a _____ of about 228 million kilometers. Its _____ is 53% as wide as that of the earth. It looks like a _____ and _____ball. It’s very beautiful. But during _____ and _____, strong _____can cover the whole_____of Mars. The gravity on the surface of it is about _____ as_____as it is on earth. Exercisefourthdistanceredorangespringsummerstormssurfacetwo-fifthsstrongdia ... ...