(共24张PPT)
Unit 5
Unit 5
Revealing nature
To get key words and information through reading the science magazine page;
To talk about the importance of seeds travelling;
To develop the awareness of revealing nature.
Do you like animals Can you name the following animals in English Do you know what situation these animals have in common
whale
rhino
Tibetan antelope
All these animals above are in danger now. Why are they in danger of disappearing
Why are they in danger of disappearing
a lack of food
have been eaten
Rivers have been polluted.
air pollution
killed by people
Trees have been cut down.
…
Revealing nature
What do you expect from the title
How much do you know about nature
Man selects only for his own good; nature only for that of the being which she tends.
Charles Darwin
Look deep into the nature, and then you will understand everything better.
Albert Einstein
reveal: to make known something that was previously secret or unknown
Look at the page from a science magazine and answer the questions.
1. What do you know about these animals What makes them special
Komodo dragons were first encountered by Western researchers in 1910.
The researchers said the ancestor of the Komodo dragon most likely evolved in Australia and spread westward, reaching the Indonesian island of Flores 900,000 years ago.
Komodo dragon
The Komodo dragon is the largest lizard in the world. It can grow to three meters in length and can weigh about 135 kilograms. Despite its size and weight, it can run for short distances at up to 20 kilometers per hour.
The first scientists to examine a preserved platypus body judged it a fake in the late 18th century.
The oldest discovered fossil of the modern platypus dates back to about 100,000 years ago.
Duck-billed platypus
The duck-billed platypus is a small egg-laying mammal (up to 60 cm in length) found only in Eastern Australia including Tasmania. As its name suggests, it has a mouth that looks like a duck’s bill, while its thick fur and flat tail are similar to those of a beaver.
Fossil records indicate that the nautilus has survived relatively unchanged for around 500 million years. It is often considered a “living fossil”.
Nautilus
As one of the oldest sea animals in the world, the nautilus has hardly changed in about 500 million years, and that is why it is often given the name “living fossil”.
They have survived on Earth for millions of years. They are all rare species.
2. What other similar animals do you know about Share your knowledge with the class.
Pangolin
Golden monkey
Lynx 猞猁
Iguana 美洲鬣蜥
Giant tortoise
1. How can seeds travel How can this benefit plants
2. Can you think of another example of seeds travelling Share it with the class.
Watch the video and answer the questions.
How can seeds travel How can this benefit plants
2. Can you think of another example of seeds travelling Share it with the class.
Seeds usually are carried by the wind, water, and animals.
Plants can have a better chance at life.
Open.
Seeds Traveling
① by itself
② by the wind
③ by the water
⑤ by the animals
⑥ by the insects
④ by the birds
The oldest discovered fossil of the modern platypus dates back to about 100,000 years ago.
date back to: If something dates back to a particular time, it started or was made at that time
追溯（到）；开始（于）= date from
常用一般现在时态，不用进行时态，也不用被动语态，后常跟过去的时间，如：……世纪、……年代、过去的年份等
e.g. The history of their family dates back hundreds of years, and the house where they live dates back to the 18th century.
他们家族已有几百年的历史，他们住的房子始建于18世纪。
date back+一段时间：始于……（世纪、年、月、天等）前
out of date 过时的，陈旧的，不再流行的
up to date 时髦的，现代的
【语境应用】单句语法填空。
Around forty senior figures from the church attended the ceremony which ________ (date) back many centuries.
The history of the town dates back ________ the Middle Ages.
The Great Wall dates ________ the third century BCE.
dates
to
from
The greatest inheritance we can pass on to the next generation is a safe and sustainable environment, the priceless endowment of nature.
我们可以留给后代的最宝贵的遗产就是一个安全的、可持续发展的环境以及大自然无价的恩赐。
Collect some information about Darwin.
