3. True or False Questions: 1. There are 687 days in a Martian year and 24 1/2 days in a Martian day. 2.There is some water on Mars. 3.The average temperature on Mars is 15 ℃. 4.The main gases in atmosphere on Mars is oxygen. 5.The gravity on Mars is the same as the one on Earth. 6. The distance from Mars to the sun is 228 million kilometres. Facts about Mars

4. 1.There are 687 days in a Martian year and 24 1/2 days in a Martian day. 2.There is some water on Mars. 3. The average temperature on Mars is 15 ℃. There is no water,but there is a lot of ice. The average temperature is -60 ℃

5. Facts about Mars 4.The main gases in atmosphere on Mars is oxygen. 5.The gravity on Mars is the same as the one on Earth. 6. The distance from Mars to the sun is 228 million kilometres. The gravity on Mars is 1/3 of Earth’s. 95 percent of the atmosphere is carbon dioxide.

6. The Transforming of Mars StagesTimeSuggestionsResults Stage 1 Stage 2 Stage 3 Stage 4 Stage 5

7. The Transforming of Mars Stage 1 Time Suggestions Construct _________________, Conduct __________________, Look for_____________, Check for___________. ResultsThey can survive____________ __________________________ The temperature is _________ AD 2030-2045 underground buildings only as long as they wear spacesuits. experiments good sites signs of life -60 ℃

8. The Transforming of Mars Stage 2 Time Suggestions Put ________________in orbit round Mars, Release____________________ Results The atmosphere _____________, and retains _________________. Ice ____________. The temperature ____________. AD 2045-2095 huge solar mirrors chemicals into the air becomes thicker more of the sun’s heat melts rises to -40 ℃

9. The Transforming of Mars Stage 3 Time Suggestions Introduce_________________ Results Carbon dioxide______________ _________________________, _________________ appears, The temperature ____________ AD 2095-2130 plants from Earth can be converted into oxygen Clouds and blue sky goes up to -15 ℃

10. The Transforming of Mars Stage 4 Time Suggestions Make_____________________ Construct ________________ Plant ___________________ ResultsMars_______________ The temperature is__________ AD 2130-2145 rivers and small oceans towns forests of trees is looking greener 0℃0℃

11. The Transforming of Mars Stage 5 Time SuggestionsBuild ______________________ Results The amount of oxygen________ Air becomes___________ The inhabitants can__________ __________________________ The temperature ____________ AD 2145-2185 cities,farms and industries rises breathable go out without spacesuits reaches 10 ℃

12. Question Patterns Is it necessary/important/…to…? Why? How long will it take to … How do the scientists intend to…in Stage … What is the main purpose of the actions in Stage … Why do the scientists ….in Stage …? What do you think of …

13. Summary Fill in the blanks according to the five stages As we all know, Mars is the planet most similar to Earth. People have dreamed of living there for centuries.Therefore, scientists spare no effort to ____________Mars.They use the ‘greenhouse effect’ to raise its ＿＿＿＿＿＿ and obtain enough _______.They also introduce more plants to release _______,and the ________is getting close to Earth as well. After the success transformation, people can live there happily and comfortably. transform temperature water oxygen gravity

16. 1.Read the text fluently and recite paragraphs 1&2 as possible as you can. 2.Finish the exercises on page 81.