高中英语 Unit4《Exploring plants》Writing课件(1) 新人教版选修9

TH: Excellent. Well done. So, what’s our conclusion about three important conditions that a seed needs in order to start growing?
S: That seeds need warmth, water and oxygen to grow.
Did the Reasons why or seeds grow? why not
Yes Dish A
Dish B
No
Because they had water, warmth and oxygen.
Because it was too cold.
Did the Reasons why or why not
TH: Yes. Now, Dish D is interesting. The seeds got both water and warmth so why didn’t they grow? Any ideas? Andrew?
A: Well, the seeds got boiled water. TH: So, why’s that important? Anyone?
3. Where are the materials that the students need to set up the experiment? On the bench.
4. What materials do the students need to set up the experiment? Four dishes and four pieces of cloth, a dish of seeds, some tap water, some boiled water and some cooking oil.
4. Take Dish C and put it next to Dish A. Do not water it.
5. Take Dish D and water it with the boiled water. Then drop a small amount of oil onto the seeds and put it next to Dish C. 6. Leave them all for a few days.
prevented oxyg to the second part of the tape again and discuss the question:
What was the conclusion of the experiment?
Seeds need warmth, water and oxygen to grow.
seeds
grow?
Dish C
No
Because they didn’t get any water.
Because they were watered
Dish D
No
with boiled water which has no oxygen. Also, they were
covered with oil which
● what the “procedure” tells you (the steps you carry out to set up the experiment); ● the grammatical structures used for each section of the report.
3. some boiled water 4. some tap water 5. a dish of seeds 6. some cooking oil
Procedure: 1.Put the pieces of cloth on the dishes. 2.Spread the seeds on the cloth. Label the 3.dishes A to D. 2. Take Dish A and wet the cloth with tap water and place it in a well-aired warm spot—so by the window over there would be fine. 3. Take Dish B, wet it with tap water and put it in the fridge.
Third listening
Listen to the first part again and complete the table of conditions that each dish of seeds was given.
Conditions
Dish A tap water, warm temperature, oxygen
Dish B tap water, cold temperature, oxygen
Dish C no water, warm temperature, oxygen
Dish D boiled water, oil, warm temperature, no oxygen
Fourth listening Now listen to the second part of the tape in which the class discusses the results of the experiment. Complete the table of results.
The materials are all on the bench. Choose someone from your group to go and get four dishes and four pieces of cloth, a dish of seeds, some tap water, some boiled water and some cooking oil. Look at the instructions on the board. Let’s read through them.
experiment is? What order do you think the pictures
should go in?
Number the pictures in the order you
hear about them.
3
1
5
4
2
Listen to the first part again and answer the questions.
TH: Very good. Now I want you all to write up the experiment in your science notebook.
Writing task
When writing an experiment report, you can ask questions about: ● the position of the headings, what the headings are, their order: ● how the items in the “materials” section are presented (as a list);
Outline
Aim: To find out three important conditions that seeds need in order to start growing. Materials:
1. four dishes A B C D
2. four pieces of cloth
One: Put the pieces of cloth on the dishes and spread the seeds on the cloth. Label the dishes A to D.
Two: Take Dish A and wet the cloth with tap water and place it in a wellaired warm spot– so by the window over there would be fine.
Three: Take Dish B, wet it with tap water and put it in the fridge.
Four: Take Dish C and put it next to Dish A. Do not water it.
Five: Take Dish D and water it with the boiled water. Then drop a small amount of oil onto the cloth and put it next to Dish C.
Well, boiled water has no oxygen in it and seeds need oxygen to grow. And What about the oil? Sandy? S: Wouldn’t the oil make sure that no Oxygen could get to the seeds?
LISTENING TEXT
An experiment on plants Part1: Listen to a teacher(TH) helping
her class set up an experiment. TH: OK, everybody, this morning we’re
going to do an experiment to find out three important conditions that seeds need in order to start growing.
Six: Leave them all for a few days. OK, now you can go ahead and set up the experiment.
Part 2: Listen to the class discussing the results of the experiment. Students include Andrew (A), Rosemary (R) and Sandy(S).
Experiment reports
Listening on P79 Look at the pictures in Exercise 1 and
guess the answers to the questions: What materials are being used in this
experiment? What do you think the purpose of the
TH: Good. Why do you think the seeds in Dish B didn’t grow? Rosemary?
R: Because it was too cold? TH: That’s right. And what about
Dish C?
R: The seeds didn’t get any water so they couldn’t grow.
1. What is the purpose of the experiment? 2. To find out three important
conditions that seeds need in order to start growing.
2. Are students going to do the experiment in groups or individually? In groups.
TH: Right, let’s talk about what’s happened in our experiment. What are the results? Andrew?
A: The seeds in Dish A have started growing but none of the others have.