Time is like the water in a sponge; if you squeeze, you can always get some.
Unit 4 Astronomy: the science of the stars
The Solar syst
planets ? many comets ? other objects
1.Do you know the eight planets that
circle around the sun? (nearest—furthest)
The Roman god of merchants and travellers
The Roman goddess of love
Our planet, the earth, is a large ball of rocks and metals covered with water and soil. It is surrounded by a blanket of gases called the atmosphere, has one moon (natural satellite), and as far as we know, is the only planet that produces life.
The Roman god of war
The king of the Roman gods
The Roman god of seeds and sowing
The Greek god of the sky
The Roman god of the sea
2.What interests you in astronomy? Do you know any questions that astronomers are interested in?
Astronomy is the scientific study of the universe and the heaven bodies (such as the sun, the moon, and stars), gas, and dust within it.
In 1609 Galileo learned of the invention of the telescope in Holland. Galileo made a series of discoveries using his new telescope Galileo 伽利略
Universal gravitation 万有引力
The theory of Relativity
The theory about black holes
Invented seismography and the Armillary Sphere (浑天仪) so as to observe the universe and predict earthquake
张衡(78 AD - 139 AD), earliest astronomer in China Later Han Dynasty
Do you know any legend about the origin of life on earth?
Legends in China
Nuwa made human beings
From China: Pan’gu separates the sky from the earth
Pan’gu separated the earth and sky with an ax. After he died, Breath Voice Left eye Right eye Blood Tendon(筋脉) muscles
wind and cloud thunder sun
moon Edges and mountains Arms and legs
rivers roads fields
Hair Teeth and bones
metals, pearls and jades
Other legends about the beginning of
universe: The Jewish/Christian/Muslim story
The Bible Day 1: God spoke and separated light from darkness creating Day and Night
Day 2: God spoke and separated
the water creating sky and
Day 3: God spoke and created dry
Day 4: God spoke and created the sun, moon and stars Day 5: God spoke and created living creatures in the air and sea Day 6: God spoke and created the land animals and man Day 7: God rested and blessed this day calling it Holy
Read the title and look at the pictures. Predict what the reading will be about.
evolution It is about the ________ of life on earth.
Skimming: (I minute)
1.How is the whole passage organized? (in what order) The passage is written in time order.
several billion years after the “Big Bang” many millions of years later next later about 2.6 million years ago
Do you know the meaning of these words?
Carbon dioxide Oxygen Nitrogen Acids Water vapour
Which one belongs to amphibian? A frog B snake C dinosaur
Live both on land and in water
Which one belongs to reptile? A fish B snake C bird
Cold blood and lay eggs
which one belongs to mammal ? A dinosaur B dog C fish
Give birth to young babies
2. main idea of each paragraph (5 minutes)
Paragraph 1 Paragraph 2 Paragraph 3
A _______ acceptedtheory about widely _______ the beginning of the universe _______ formation The __________of the earth water The importance of _____for life plants The development of ______and animals _________on the earth The arrival of human beings ______________and their impact on the earth
Scanning: (5 minutes) Put the order of development of life into a timeline. Ex 2 on P27
1.The universe began with a ― Big Bang‖– explosion
2.The earth was a cloud of dust
3.The earth became a solid ball solid liquid
4.Water appeared on th earth
5.Small plants grew on the water
6.Shellfish and other fish appeared
7.Plants began to grow on dry land
8.Insects and amphibians appeared
12.Clever animals with hands and feet appeared
Read the first paragraph(1 min)
At the very beginning, the earth had no ______ A.dust B.atoms C.water D.matter
Read from Para2—4
1. Why was the earth different from the other planet?
Because the water remained on the earth.
2. Why did the plant grow before the animals came?
Because plants provide oxygen for animals to breathe.
3. Why was it wrong to show films with dinosaurs and people together?
Because dinosaurs died out long before human beings developed on the earth.
Read Para 5
What problem is caused by human beings? They are putting too much carbon dioxide into the atmosphere, which prevents heat from escaping from the earth.
The more we do, the more we can do; the busier we are, the more leisure we have. 做得越多，则能做的越多；越是忙碌， 则空闲越多。
putting carbon dioxide into the atmosphere Prevent heat from… As a result…
Para2 The formation of the earth
a cloud of dust
violent a _______ solid globe
exploded with fire and rock produced carbon, water vapor and other gases-- atmosphere cooled down—water appeared on its surface
Para3 The importance of water for life
Water is fundamental to the development of life On the other planets like Mars
water disappeared later.
On the earth
What many scientists believe is that the continued presence water allowed earth to _________ ________of dissolve ________ _______ and acids into the harmful gases oceans which produced a ______ reaction chain ________.
Para 4 The development of plants and animals on the earth
the extremely small plants on water shellfish and all sorts of fish green plants on land land animals( insects and amphibians) forests reptiles dinosaurs mammals
How life began on earth is one of the biggest puzzles that scientists found hard to solve. What other puzzles are hidden in the passagge?
The disappearance of dinosaurs
To your understanding, what might be the reasons for the disappearance of dinosaurs? Try to convince the other students.
I strongly believe that… What caused the disappearance of dinosaurs remains a mystery, but according to… The reason is that… It is obvious that… There is no doubt that…because…
Good morning/afternoon, I am Dr….
I’m greatly honored to be here to give you
a speech about the evolution of life on