Astronomy the science of the stars-warming up and reading课件_精品.ppt

reptiles on land dinosaurs on land (1) What life developed after forests appeared? After that * mammals on land (2) What life developed after dinosaurs? * small clever animals (3) What life developed after mammals? Finally * The Big Bang water Small plants insects and amphibians land on Reptiles on land mammals advanced mammals dinosaurs * 1. Small plants in water 2 ._______ and all sorts of fish 3. Green ____ on land 4. ____ (on land) 5. Amphibians (on land and in ____) 6. Plants grew into _______. 8. __________ (on land) 9. __________ (on land) Have a try: Talking about the development of life 7. _____ (on land) 10. ____________ (small clever animals on land) Shellfish Insects water plants forests Reptiles Dinosaurs Mammals Human beings * After the “Big Bang”, the earth was just a cloud of dust. It __________ loudly with fire and rock, which were _________to produce the water vapour, ___________ and other gases. Then small plants grew. They ___________and filled the oceans and seas with oxygen. Many millions of years later， the first green plants began to ________on land. When the plants grew into forests, reptiles appeared for the first time. They produced young generally by _________eggs. exploded in time carbon dioxide multiplied appear laying * When dinosaurs disappeared, mammals became more i_________. Now small clever animals with_____________ appeared and ___________ all over the world. As time went by, they covered the earth and they are putting too much carbon dioxide into the__________, which ________heat_________ the earth into space. Whether life will continue on earth for millions of years to come will ________whether this problem can be solved. mportant hands and feet spread atmosphere prevents from depend on * Please retell the passage according to the pictures. Revision * Big Bang A solid ball The earth Atmospher