(共27张PPT)
英语
电子教案
七年级 下册
Epic engineering
4
Unit
can describe engineering works,
the challenges of building them,
and the solutions
Objectives
learn some words about engineering works and ways to overcome challenges
practise sentence stress
use although and though
Tasks
can get a deeper understanding of what epic engineering is
read an article about the Qinghai–Xizang Railway
listen to a radio programme about the Grand Canal
study an example of clever engineering
can communicate on engineering works and ways to overcome challenges
Objectives
talk about the Grand Canal
make a building plan based on a map
Tasks
can present an example of epic engineering by using an outline
write a short description of Dujiangyan
①
②
③
④
The Qinghai–Xizang Railway is a world wonder. It took over 50 years to complete. Although it was difficult, Chinese engineers did their best to overcome the challenges.
_______. Engineers built walls to block the sun. They also built some parts of the railway above ground.
_______. To solve the problem, the engineers built 25 special passages for them. Now the animals can cross the railway without danger.
The Qinghai–Xizang Railway ends Xizang’s no-railway history. It is an epic road.
Write a short description of Dujiangyan in Chengdu, a great example of epic engineering still in use today.
A description of an engineering wonder
Study a model. Read and complete the two tasks.
Subskill: Using an outline
1
Choose the correct topic sentences for Paragraphs 2 and 3.
a
b
c
d
e
One big problem was the cold weather.
The biggest challenge was permafrost.
Animals are in danger.
Another challenge was to protect the animals.
Permafrost was a kind of frozen ground.
①
②
③
④
The Qinghai–Xizang Railway is a world wonder. It took over 50 years to complete. Although it was difficult, Chinese engineers did their best to overcome the challenges.
_______________________________. Engineers built walls to block the sun. They also built some parts of the railway above ground.
_____________________________________. To solve the problem, the engineers built 25 special passages for them. Now the animals can cross the railway without danger.
The Qinghai–Xizang Railway ends Xizang’s no-railway history. It is an epic road.
The biggest challenge was permafrost
Another challenge was to protect the animals
2
Complete the outline of the model with the expressions in the box.
Introduction
Topic sentence
Supporting details
Conclusion
1 ___________
2 ________________
3 ________________
4 ________________
5 ________________
6 ___________
Topic sentence
Introduction
Topic sentence
Supporting details
Supporting details
Conclusion
Think. Study the table and pictures about Dujiangyan. Write proper topic sentences and supporting details.
Dujiangyan, an engineering wonder Basic information
Challenges and solutions
Importance
in Chengdu, China
had a history of over 2,000 years
Li Bing designed it
three parts: Yuzui, Feishayan, and Baopingkou
Floods in rainy seasons:
use Yuzui and Feishayan / keep water from entering the inner river
clear sands
Not enough water in dry seasons:
use Yuzui and Feishayan / let water in
use Baopingkou / guide water into dry farms
...
improve the life of local people
show the wisdom of Chinese people
Topic sentence 1: __________________________________ ______________.
Supporting details: _________________________________ _________________________________________________ _________________________________________________ ________________________.
One of the biggest challenges is floods in rainy seasons
People built Yuzui, a thick wall, and a smaller channel called Feishayan. They keep water from entering the inner river. People also take care of them by clearing the sand every year
Topic sentence 2: __________________________________ _____________________.
Supporting details: _________________________________ _________________________________________________ ________________________________________________.
Another challenge is not enough water for farms in dry seasons
During dry seasons, people use Yuzui and Feishayan to let water into the inner river. People also built Baopingkou, a channel, to guide water into dry farms
Write. Write about Dujiangyan with the given information, using the model to help you.
Check. Read your writing and answer the questions.
Did you use an outline
Did you write effective topic sentences and give supporting details
1
2
Peer review. Exchange your writing with your classmate. Answer the questions.
Does he or she write effective topic sentences with supporting details
What changes would you like to make to your writing
1
2
How can we overcome big challenges of engineering
Task: Make a building plan. Your school has organized an event called “Little Planners, Better Life”. You are going to create an engineering project based on the map. You have to choose a suitable site, identify possible challenges, provide solutions, and prepare a presentation. There are two models.
Little Planners, Better Life
1
power station
2
railway station
3
4
5
6
7
We’d like to build a railway station at Site 2. Although the site is far away from the city centre, there are houses and office buildings nearby. So we have to deal with the problem of noise pollution. We plan to plant trees and build sound-blocking walls to reduce train noise.
We plan to build a power station at Site 1. The place is at the upper part of the river and is not packed with many buildings. So we can use water and wind to produce electricity. Studying the weather report will help us decide the location of the power station!
Work in groups. Study the map and decide what kind of engineering project you want to build. Search the internet to gather information about the suitable location, possible challenges and solutions.
We’d like to build _________ at Site __ because _______________ ________________________________________.
Possible challenges
Possible challenges
a pet park
3
the area is covered
with grass and is close to several housing estates
We need to keep the park clean.
We need to make the park a pleasant and safe place for pets and their owners.
We will set up waste stations and ask people to obey the rules when walking their dogs.
We’ll also provide toys for pets to play with on the grass.
Exchange and analyse the information you have collected within the group.
Discuss the possible challenges and solutions to reach an agreement.
TEEN SKILL
Leaders give tasks to each group member. Each person will be responsible for a specific part of the presentation.
Present your project to the class.
Listen to the presentation of each group and do peer checks.
Their presentation includes the challenges and possible solutions.
Their presentation is clear and attractive.
Checklist
How well I can do these A. identify the text type, the topic, challenges and solutions in different texts
B. communicate on engineering works by using words about overcoming challenges and although or though
C. describe an engineering wonder by using an outline with effective topic sentences and supporting details
D. understand the history of railways
E. create tips for a trip on the Qinghai–Xizang Railway by analysing the challenges and possible solutions
F. organise information in the form of tables or mind maps
Describing engineering works
amazing connect lift
material passage railway
Dealing with challenges
block the sun control the rivers energy
invent ways oxygen levels protect the environment reduce noise terrible weather use tools
Add more! What other useful words or cool things have you learned Add them to the lists.
canal
The word “canal” comes from the old French word chanel, which means “channel”.
Add more! What other useful words or cool things have you learned Add them to the lists.
感谢观看
