How Life Began On The Earth導學案
9 shellfish and other fish appeared.
10 the universe began with a “big bang”.
11 clever animals with hands and feet appeared.
12 mammals appeared.
task 3 post reading
fill in the blanks
finally about 2.6 million years ago some small ______ animals, now with hands and feet, appeared and _______ all over the earth. _____ they have, _______, become the most important animals on the planet. but they are not _____ the earth very well. they are putting too much _______ into the ______, which ______ heat _____ escaping from the earth into space. ____, many scientists believe the earth may become too hot to live on. so _______ life will continue on the earth for millions of years to come will ______ whether this problem can be solved.
討論(discussion)
how can we protect the earth and make it a better place to live on?
家庭作業(homework)
read the text.
review the new words and expressions.