(共17张PPT)
Unit 5
Look into Science
Lesson 28
The Study of Living Things
Do you know him
Free Talk
Charles Robert Darwin
He is a .
He studies living things.
biologist
Biology is a subject that studies life phenomena（现象） and the laws of life activities. It is the foundation （基础）of agriculture, forestry, medicine and environmental science.
Dig in
What do you know about biology
Lead in
They are butterflies.
This is Dr. Chip Taylor.
He studied one kind of North American butterfly.
What have been drawing Dr. Taylor’s attention
Reading tasks
Fantastic facts about butterflies.
fantastic adj.奇异的，了不起的，极好的
New Words
Most birds have to fly long distances to migrate.
No. It is puzzling.
How did they find their old home Do you know
adj. 令人费解的
v. 移居; 迁徙
New Words
adj.
化学的;与化学有关的;
n.
化学制品;化学品
These are chemicals.
Magnesium can burn completely in oxygen.
adv. 完全地
New Words
Do you know the relationship between the female and the child
female
n. 雌性的动物或植物;女子
This female is the child’s grandmother and the child is the femal’s grandchild.
They are the butterflies that Dr. Chip Taylor studied .
Listen and follow
Read the lesson and complete the table.
Fantastic facts about butterflies The butterflies always ________ to the same small piece of forest and ________ the winter there.
The butterflies that return to the south are the great great grandchildren of the butterflies that left for the north.
The females _____ eggs on only one plant：milkweed.
return
spend
lay
Reading tasks
Read the lesson and complete the table.
Things that Dr. Taylor worries about In Mexico, people cut down the trees that the butterflies need to ______on.
In the U.S. and Canada, farmers use chemicals that ______ milkweed.
Things that scientists can’t understand How do the butterflies know when to fly south
How do the great great grandchildren of the butterflies ________ the same forest
find
rest
kill
Reading tasks
Emotional promotion
Are dinosaurs the ancestors of mankind
Emotional promotion
Do you know the mystery of whale suicide
There are many mysteries yet to be discovered.
Would you like to study biology
we did yeserday
that
Join the sentences to make attributive clauses.
Example：
We did some experiments yesterday.
The experiments were fantastic.
1, 确定为先行词。
Grammmar
Steps:
2, 确定关系代词/副词,并放在先行词之后。
3, 把从句的剩余部分加在后面。
The experiments
3, 把主句的剩余部分加在后面。
were fantastic.
Join the sentences to make attributive clauses.
1.I asked him to mail the letter. I wrote the letter to my cousin.
________________________________________________
2.Yesterday I met a boy. The boy is a new member in our art club. _________________________________________________
3.Mary was carrying a bag. The bag cost her a lot of money.
________________________________________________
4.Football is a team sport. Football is popular all over the world.
_________________________________________________
I asked him to mail the letter that I wrote to my cousin.
Yesterday I met a boy who is a new member in our art club.
Mary was carrying a bag that cost her a lot of money.
Football that is a team sportt is popular all over the world .
Grammmar
Work in groups of three to play a game.
Task tips：Each group should prepare some pieces of paper and divide them into three columns. Student A writes a person's name in the first column, folds the paper and passes it to Student B．Student B writes a statement beginning with “who”, folds the paper and passes it to Student C．Student C must finish the sentence and read it out loud.
Example：
Mr. Brown who is a biologist will give us a talk
Group work
biology butterfly migrate fantastic completely grandchild female milkweed chemical puzzling
Fantastic facts about the butterfly have been drawing Dr. Taylor’s attention.
The butterflies that return to the south are the great-great grandchildren of the butterflies that left for the north.
When they begin to travel north in spring,the females lay eggs.
Summary
