牛津上海版高中二年级上学期Unit 6 Space exploration 课件

Reading, Oxford S2A about 1,300,000,000 about 7,000,000,000 Solar System 1 2 3 4 5 6 7 8 9 1. Mercury 2. Venus 3. Earth 4. Mars 5. Jupiter 6.Saturn 7.Uranus 8.Neptune 9. Pluto Why ? most similar to Earth They want to transform Mars so that humans can live there. change completely 24 1/2 hours 687 days no water a lot of ice -60°C 95% carbon dioxide 200N 228 million (minus 60 degrees Celsius ) centigrade Earth Mars Length of one day 24 hours Length of one year 365 days Is there water? Yes There is________, but there is_____________. Main gases in atmosphere Nitrogen 78%, oxygen 21% Average temperature 15°C Gravity: weight of a 60 kg person 600N About __________ Average distance from the Sun 150 million km __________ km 5 stages Stage 1 1.How long did the first expedition take to the Mars? 2. What are the four things to do? 3. Why do the members wear spacesuits? 4.Why can the members move easily? AD 2030-2045 About 6 months by