Astronomy: the science of the stars Unit 4 Astronomy: the science of the stars

Where are we? Where are we?

---Pluto ---Venus ---Neptune ---Earth ---Mars ---Mercury ---Uranus ---Saturn ---Jupiter

How life began on the earth

Pangu separates the sky from the earth Legends about the beginning of the universe in China: Pangu separates the sky from the earth

The Goddess Nuwa created human beings from the clay.

it exploded and produced kinds of gases the earth’s atmosphere Skimming Read Para 1.2 and find out how the earth and water came out A cloud of dust Big Bang a solid ball slowly combine it exploded and produced kinds of gases the earth’s atmosphere water the earth cooled down

water forests water Scanning Fill out the chart: How life began on the earth water 1. water small plants 2. shellfish and all sorts of fish 11. 3. green plants on land 10. small clever animals 4. Insects (on land) 5. Amphibians 7. 8. dinosaurs (on land) 9. reptiles forests 6. mammals

Play a game 1 2 3 4 5 6 7 8 9

make watch wonder be cool multiply begin exist explode Where do we come from? How did the universe __________ ? When we _______ the stars through the telescope, we _________ why the universe ________ . After the “Big Bang” ,the earth ______ just a cloud of energetic dust. Somehow it _________ loudly with fire and rock, which ______ the earth’s atmosphere. As the earth _______ down, water _______ to appear on its surface, which was important for the beginning of life. Then living things __________ on the earth. begin watch wonder exists was exploded made cooled began multiplied

A. Insects. B. Reptiles. C. Dinosaurs. D. Humans. 2.What does “small clever animals” refer to in the passage? A. Insects. B. Reptiles. C. Dinosaurs. D. Humans.

4. What problem is caused by human beings? A. They exist everywhere on the earth. B. They caused global warming. C. They find new methods of growing crops. D. They enjoy hunting and fishing.

3.What’s the importance of water on the earth? Water is fundamental to the development of life.

5.What is the main idea of the text? How life began on the earth.

Put the order of development of life into a time line. insects and amphibians appear a solid ball reptiles appear a cloud of dust shellfish and other fish appear dinosaurs appear small plants grow on the water plants begin to grow on dry land presence of water mammals (including humans )appear D H B A C I G F E J

The universe began from ____________. the big bang The universe began from ____________.

Look at the pictures and tell the groups. shellfish plants fish mammals reptiles

9.Why is it wrong in films and stories to show dinosaurs and people together? Dinosaurs died out long before human beings developed on the earth.

Summary water Small plants

7 6 5 4 water Small plants 1 3 2

7 6 5 4 1.Early shellfish 3 2

7 6 5 4 2.Some insects 3

7 6 5 4 3.Fish

7 6 5 4.amphibians

7 6 5.Reptiles

7 6.mammals

7.Small clever animals

As students, what little things can we do for the earth? Discussion As students, what little things can we do for the earth?

What can we do to protect the earth? solar energy purify air plant trees save water recycle rubbish prevent desertification

Homework Suppose you are to design an activity for your school on Earth Day, which is intended to call on teachers and students to protect the earth. Work in groups and choose a reporter of your group to report your work. The following points should be included in the report of your activity. What the activity is about Why the activity is designed When and where to do the activity Who takes part in the activity What to be done in the activity

Thank you!