第四单元waringupandreading1

1、Astronomy: the science of the starsUnit 4nChinesenmathematicsnEnglishnphysicsnchemistrynbiology npoliticsnhistoryngeographyphysicsmathematicschemistrybiologygeographyScience subjectsastronomyastronomyAstronomy is the scientific study of the universe and the heaven bodies (such as the sun, the moon,

2、and stars), gas, and dust within it. What is Astronomy?What is Astronomy?A Quiz Game 1.How old is the earth? A. About 3.5 billion years A. About 3.5 billion years B. About 4.5 billion years B. About 4.5 billion years C. About 5.5 billion years C. About 5.5 billion years D. About 6.5 billion years D.

3、 About 6.5 billion years 2. _of the earth surface is covered by water. A. 20% B. 30% C. 50% A. 20% B. 30% C. 50% D. 70% D. 70% 3.Who wrote “The Origin of Species ” (物种起源物种起源)?A. Newton B. Einstein C. Charles Darwin4. On what day is the Earth day celebrated? A. April 22 B. May 4 C. August 21 D. Novem

4、ber 115.How many planets are there in the Solar System? A 7 B 8 C 9THE SOLAR SYSTEM Do you know what these planets are in the Solar System? 地球地球 _木星木星 _火星火星 _水星水星 _海王星海王星 _土星土星 _ 天王星天王星 _ 金星金星 _EarthJupiterMarsMercuryNeptuneSaturnUranusVenusMercury水星水星 Venus金星金星 EarthMars火星火星Jupiter木星木星Saturn土星土星Ura

5、nus天王星天王星Neptune海王星海王星Mercury Venus Earth Mars Jupiter Uranus Saturn NeptuneScientists now think Pluto is too small to be called a planet.How did life begin on Earth? How did life begin on Earth? How was the universe formed? How was the universe formed? Pre-readingvEach religion and culture has its

6、own ideas about how life began on earth. What do you know about the legends ?God created the world. Pangu separated the sky from the earth.Nvwa made humans.1. insects 2. plants3. reptiles 4. shellfish 5. amphibians 6. fish 7. mammals Study of the groups of life (种类种类/物种物种)Look at the pictures and te

7、ll the groups.plantsreptiles (爬行类爬行类)shellfish (贝类贝类)fishinsectsmammalsamphibians (两栖类两栖类)How Life Began on The Earth Reading Read the passage quickly to find the main idea of each paragraph.Paragraph 1: A widely accepted theory about the formation of the universeParagraph 2: The formation of the ea

8、rthParagraph 3: The importance of water for lifeParagraph 4: The development of plants and animals on the earthParagraph 5: The arrival of humans and their impact on the earthDetailed ReadingThe development of the earthRead the first 3 paragraphs quickly and find out what it is mainly about.nThis te

9、xt can mainly divided into two parts.(1) What happened in the beginning?The Big Bang(2) What happened several billion years after the Big Bang? a cloud of dust a solid ball exploded with fire and rock produced water vapour and gases(3) What happened next?(4) What did the water vapour and gases form?

10、The earths atmosphereWater appeared.(5) What appeared on the earth after it cooled down?(6) What did the water form?oceans and seasThe development of lifeRead the last 2 paragraphs quickly and find out what it is mainly about. appearance of small plants in water(1) What life developed after water ap

11、peared?early shellfishStage 1.The development of life in waterall sorts of fish(2) What life developed in water next? green plants on land insects on land(3) What life developed after the life in water?amphibians on land and in the waterforestsStage 2: The development of life on land(1) What life de

12、veloped next on land? reptiles on land dinosaurs on land(2) What life developed after forests appeared?mammals on land(3) What life developed after dinosaurs? small clever animals(4) What life developed after mammals?Summary The universe began with a “B_”. The earth was a cloud of dust.The earth bec

13、ame a solid ball then it e_ with fire and rock.They produced carbon and other gases, which made the earths a_.When it cooled down, water appeared on the s_.Then small green p_grew on the water, and later shellfish and other fish appeared.ig BangxplodedtmosphereurfacelantsSummary When plants began to grow on dry land, insects and a_ appeared.Forests appeared before r_appeared .They produced young by l_eggs.The