If human continue to pollute the air, it will not contain the correct ( 5 )_________ of these gases.. unlimited3[r]
(1)(2)(3)1. 2. 3. 4. ecologist conserve conservation fertilize vital
nhà sinh thái học bảo tồn
bảo tồn
làm cho màu mỡ cần cho sống (n):
(4)Task
Listen and complete the sentences by circling the letter A, B, C or D.
1. Ecology is the study of
A human beings and animals B the evironment and solar energy
C natural and alternative resources D human beings and their environment
2. The natural environment consists of A the oceans and the land B the sun and the air
C all natural resources D the air and the oceans
3. If the resource can be _, it is called renewable A burnt quickly B used easily
C divided properly D replaced quickly
4. Grass for animals is a _ resource
A renewable B nonrenewable C limited D clean
5. According to the passage, coal is nonrenewable because it takes to make it
(5)Task 2. Listen to the last part of the talk and write in the missing words.
Solar energy, air, and water are renewable resources because there is (1) supply However, this
definition may change if people are not careful with these resources The amount of solar energy that reaches the earth depends on the (2) If the atmosphere is polluted, the solar energy that reaches the earth
(3) be dangerous If life is going to continue, the air must contain the correct amount of nitrogen (N), oxygen (O), carbon dioxide (CO2), and other
(4) If human continue to pollute the air, it will not contain the correct (5) _ of these gases.
unlimited
atmosphere may
gases
(6)Task 3.
Put a tick () in the right column and discuss the reasons
Sources of energy Nonrenewable Renewable
(7)Homework:
(8)