八年级下>Module 3 Journey to space >Unit 2 We have not found life on any other planets yet

课件24张PPT。Is there any life on the earth? How long has there been life on the earth?Unit 2
We have not found life
on any other planets yet.Have scientists found life on other planets?Yes, there is.Maybe there has been life on the earth
for hundreds of millions of years.好几亿Look at the picture and talk about what you know about Chinese spaceships.
Shenzhou-9 is a manned(载人) spaceship.Work in pairs[m?nd] the universe?[‘ju:n?v?:s] Listen and read the passage and choose the best title for it.
1. Anyone out there?
2. Life on the earth
3. The sun and other stars
4. The stars at night √ Are we alone ?Is there life out there in space?Anyone out there ?Is the universe very large?　How large is it?It is impossible to imagine how large it is.Earth--planetstarsolar systemgalaxyuniverseWhat do you know about the universe?SunRead P2 galaxy solar systemuniverse the Milky Waythe Sunthe Mercurythe Earththe Venusthe Marsthe Jupiterthe Saturnthe Uranusthe Neptunethe Pluto the solar system the earth the sun the moonstar恒星planet行星satellite卫星Solar systemlight and heat the earth the moonSpeak out the differences between the earth and the moon has an environment with airthings can growThere is life on earthplanetWhich is the smallest?staruniversegalaxysolar systemWhich is the largest?planetsmallstaruniversegalaxysolar systemlargethe earth
(planet)the sungo aroundan environmentthe solar system(group of stars and planets)
the Galaxybillions of starsHow long has there been life on Earth ?
For hundreds of millions of years.
2. Is the Earth a planet or a star?
It is a planet.
3. How many planets are there ?
There are 8 planets .
4. Has there been life on the other planet , why?
No,there hasn’t. None of them has an environment like on the earth, so people and things can’t grow.
5. What do the planets go around?
The planets go around the Sun.
6. What are the sun and its planets called?
The sun and its planets are called the solar system.Para. 1 &21. Have scientists discovered only one galaxy in the universe?
No, they have discovered many other galaxies.
2. What have scientists done for the space?
They have sent spaceships. Para. 3 &41. The Earth is a star.
2. The Sun is a star.
3. There is more than one galaxy.
4. The light from stars in other galaxies has travelled for a long time to reach us.
5. Scientists have received many messages from space.
6. Spaceships have visited most of the universe.planethaven’tyet???haven’tRead the passages carefully and check the true sentences. Are we alone ?Is there life out there in space?Talk abou your idea.Complete the passage with the words and expression in the box.Is there life on other planets? There are seven other planets in our (1) ____________, but (2)______ of them has a(n) (3)____________ like that of the earth. solar systemnoneenvironmentSpaceships from the earth have done surveys of the other planets, but they have not found any life there. Why has no one from other planets tried to (4) _____________ with us? It is true that scientists have not discovered life on other planets in the (5)_________ yet, but some scientists believe that they will find it some day.communicateuniverse Guess: The future life in space.