step by step 4 Lesson 137
UNIT 69 POPULAR SCIENCE (Ⅱ)
Lesson 137
Part Ⅰ Warming-up Exercises
Instruction-following: Square or Circle?
1. 2.
3. 4.
5. 6.
7. 8.
9. 10.
Score: _______
Part Ⅱ Preserving The Environment
Vocabulary
1. deteriorate
2. assail
3. spring up
4. breeding
5. insecticide
6. spray
7. bronchial
8. smog
9. foul
Notes
An early sign of environmental limits was the air pollution of the
industrial revolution, brought on by the burning of coal to run mills
and machinery. It was not until after World War Ⅱ, however, that
pollution came to be viewed by many as a threat to the health of the
planet. By the 70s many organizations and governments were seeking
means of controlling pollution.
Current evidence strongly implicates various pollutants in numerous
human health problems: cancer, birth defects, genetic changes, etc.
Student Evaluation
My general Impression Content:
____ helpful _____ adequate
____ inadequate
Level Of Difficulty:
____ easy ____ fair
____ difficult
My Major Problems
____ understanding meanings
____ selecting major points
____ organizing facts
____ retaining concepts
My Comprehension Score
__________________________
Exercises:
Ⅰ. 1. What problem has become the focus of attention recently?
2. Is the issue considered to be very important now? How do you
know?
3. What has happened to the people living near airports?
4. Why do housing companies prefer to build high-rise buildings?
5. How does the construction of large office blocks affect
environment preservation?
6. In what way is the motor car responsible for the changes in the
environment?
7. What are the results of the large-scale use of insecticides?
8. What counter measures have been introduced recently against
environmental destruction?
9. What is smog?
10. What has caused river pollution?
Ⅱ. Problems:
1. noise pollution
2. construction of ugly high-rise buildings
3. air pollution
4. loss of rural population
5. loss of balance in ecology
6. food contamination
7. water pollution
Causes: ...
Part Ⅲ Recycling Waste
Vocabulary
1. recycle
2. complex
3. take shape
4. newsprint
5. spike
6. crusher
7. roller
8. magnet
9. Warren Spring
Notes
Most of the solid waste in many cities is still simply deposited in
open dumps. This practice causes proliferation of rats and flies,
encourages growth of diseases, and also contaminates surface and
underground water. So management of solid waste presents an
increasingly acute problem in the modern world.
Student Evaluation
My general Impression Content:
____ helpful _____ adequate
____ inadequate
Level Of Difficulty:
____ easy ____ fair
____ difficult
My Major Problems
____ understanding meanings
____ selecting major points
____ organizing facts
____ retaining concepts
My Comprehension Score
__________________________
Exercises:
Ⅰ. 1. _______________________
2. _______________________
Ⅱ.
Outline
A. Project 1
1. Purpose and plan: a. to take a city of ______________ and
discover exactly what _________________ and what _______ b. to find
out ______________ could be provided if the plant were built.
2. Possible waste to be recycled: not only _________, but also
__________
3. Ideas already made use of: a. to remove _________________ b.
to obtain valuable oils and gases from _______________
4. New idea: to ________ on a large scale in _____________
designed to __________________.
B. Project 2
1. Purpose and plan: to discover best ways of __________________
2. Possible steps:
a. to tear open _______________
b. to separate ________________
c. to break up ________________
d. to remove __________________
