Unit 4 Astronomy: the science of the stars
Teaching goals 教学目标
a. Enable Ss to talk about the science of the stars. b. Understand the text and answer the following questions:
Unit 4 1111
Astronomy: the science of the stars
The Solar System
The ny comets(彗星)
• other objects
What are the names of the eight planets that circle our sun?
Read Part1 (para1~3) Before life appeared
• How did the earth’s atmosphere form? • Why was the earth different from the other
planets? • What a role the water played in the development
What will our future be if the earth may become too hot for the lives on it?
Teaching methods教学方法
a. Skimming and scanning. b. Asking-and-answering activity to check the Ss’ understanding of the text. c. Individual, pair or group work to finish each task. d. Discussion.
火星
金星 Mars Venus
水星
地球
Mercury Earth
木星
Jupiter
天王星
Uranus
土星
Saturn 海王星
Neptune
Du Minjunxi comes from the planet of Kmt184.05. it’s said that it’s climate and environment are similar to the earth’s. But do it really exist? Maybe not because only on earth there is life.
Before life appeared.
Para.4 The_d_e_v__e_l_o_p_m ___e_n_t_ of plants and animals
Para.5 The arrival of _h_u_m ___a_n_s_ and their effects on
the earth
Different lives developed.
Period 1
How Life Began on the Earth
Each religion and culture has its own ideas about how life began on earth. What do you know?
In China, we all know that Pangu separates the sky from the earth and Nvwa made humans.
2. Why was the earth different from the other planets?
Because the water on other planets had disappeared later.
3. What a role the water played in the development of life?
What was there on the earth before life could begin?
Teaching important points教学重点
Talk about the beginning of life on the earth.
Teaching difficult points教学难点
of life?
1. How did the earth’s atmosphere form?
The earth was so violent. It exploded loudly with fire and rock to produce carbon, nitrogen, water vapor and other gases, which were to make the atmosphere.
How life began on the earth
Para.1 A _t_h_e_o__r_yabout how the universe was formed
Para.2 The f_o_r_m__a__t_io__n of the earth Para.3 The importance of w__a__t_e_r for life
The presence of water allowed the earth to dissolve harmful gases and acids into the oceans and seas. This produce a chain reaction which made it possible for life to develop
In western culture, God created the world in seven days.
The Big Bang
Fill in the blanks to learn about how life began.
understand the meaning of each paragraph.