step by step 第四册 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 1. 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 2 various pollutants 3 in numerous
human health problems: cancer, birth defects, genetic 4 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 5?   
    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 __________________