资源简介

Unit 8
I love nature!
Lesson 6 Understanding cultures
学习目标
To master some words and phrases.
To understand time on the earth through reading.
To talk about what kind of activities you can do to help save the earth.
Lead in
Look at the two pictures of the passage in Part 1 and talk about the questions below.
Do you know what they are in the first picture?
What can you see in the second picture? Do you know what happened in the picture?
What do you know about the evolution of the earth?
Look and talk
新课讲授
Our planet is about 4.6 billion years old. According to the latest research, humans appeared only 2.5 million years ago. If we shorten this into one day, humans appeared in the last two minutes. How did that happen?
Midnight on the earth started with a burst of volcanoes. Around 3 to 4 a.m., life appeared at the bottom of the oceans. At 6 p.m., water and sunlight began to provide energy for life. All kinds of plants started to grow. At 9 p.m., the earth gave birth to different creatures. At 11:30 p.m., dinosaurs appeared. They were one of the largest creatures in the history of the earth. The last 20 minutes of the day was the “busiest” time: after the age of dinosaurs, it was the age of all kinds of animals, including humans.
Reading
Read the passage and write true (T) or false(F).
A The earth has a long history.( )
B Dinosaurs arrived last on the earth.( )
T
F
Read and write
{93296810-A885-4BE3-A3E7-6D5BEEA58F35}Time
What happened
midnight
burst of volcanoes
Read the passage again and complete the table.
around 3 to 4 a. m.
life appeared
at 6 p. m.
at 9 p. m.
at 11:30 p. m.
the last 20 minutes
plants started to grow
the earth gave birth to different creatures
dinosaurs appeared
the age of all kinds of animals
Read and complete
Talk about key events during the time period and prepare a brief description.
Group work
Work in pairs. Discuss the questions.
A What's the relationship between the earth and humans?
___________________________________________________
B What will happen to the world in the future?
____________________________________________________
C What will you do to protect the earth?
____________________________________________________
The earth gave birth to humans.
Maybe there are more different kinds of creatures in the future.
Protect the environment. Don’t hunt animals.
Pair work
Do you know World Earth Day? What kind of activities can you do?
Think and share
Talk in groups and share your ideas with your classmates, using the following useful expressions..
Useful expressions
We can....
We should...
We should not....
billion = 十亿（1,000,000,000）具体数字 + billion（不加 -s）
billions of + 复数名词（表“数十亿的”，不具体指数量）
1. Our planet is about 4.6 billion years old.
我们的星球大约有46亿年的历史。
e.g. 3 billion people 30 亿人 5 billion years 50 亿年
The project cost over 2 billion dollars.
billions of stars 数十亿颗星星 billions of dollars 数十亿美元
Language points
2.If we shorten this into one day, humans appeared in the last two minutes.
如果我们把这个时间缩短到一天，人类出现在最后两分钟。
last:
a. 作形容词（adj.）最后的（与 first 相对）
e.g. the last page of the book 书的最后一页
He is the last student to leave. 他是最后一个离开的学生。
最近的；刚过去的（时间）
e.g. last night 昨晚 last week 上周 last year 去年
b. 作动词（V.）持续（表示时间长度）last (for) + 时间（for 可省略）
e.g. The movie lasts (for) two hours. 电影持续两小时。
The rain lasted all day. 雨下了一整天。
c. 作副词（Adv.）最后；最近一次
修饰动作的顺序或时间：
e.g. She spoke last at the meeting. 她最后一个在会上发言。
常见短语：at last = finally（终于）
e.g. At last, we finished the project! 我们终于完成了项目！
Last name = family name（姓氏）
e.g. My last name is Li. 我姓李。
3.Around 3 to 4 a.m., life appeared at the bottom of the oceans.
大约凌晨3点到4点，生命出现于海洋的底部。
bottom底部；底端 at the bottom of...（在...的底部/末端）
（与 top 相对at the top of...（在...的顶部/顶端）
e.g. The bird is at the top of the tree. 鸟在树顶。
the bottom of the bottle 瓶底
The key is at the bottom of the bag. 钥匙在包的最下面。
4.At 9 p.m., the earth gave birth to different creatures.
晚上9点，地球孕育了不同的生物。
give birth to ：
生下（孩子/幼崽），主语通常是母亲（人或动物）。
结构：主语（母亲/雌性动物） + give birth to + 宾语（孩子/幼崽）
e.g. The cat gave birth to three kittens. 猫生下了三只小猫。
She gave birth to a healthy baby. 她生下了一个健康的宝宝。
产生；催生
e.g. The meeting gave birth to a new idea.
这次会议催生了一个新想法。
Homework
? Write a passage about how to save the earth.
? Try to read some books or passages
about the evolution of the earth.

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