Activity 3: Activity 4: reduces pollution from certain products such as car oil and batteries; prolongs the life of limited reserves of other natural resources such as wood; saves energy
Trang 1Activity 1:
a Greenfreeze is the world’s first ozone safe
technology for domestic refrigerators.
b The advertisement is warning us about ozone
layer depletion
c Greenfreeze doesn’t affect the ozone layer.
d Industrial chemicals called halocarbons are
destroying the ozone layer
e Suggested answer: Avoid using aerosols, cars
and pesticides.
Activity 2:
a has already taken place.
b reported existing alternatives to CFCs and
other ozone depleting chemicals
c non-toxic.
d contributes to avoid ozone layer depletion
e without harming the ozone layer.
Activity 3:
Activity 4:
reduces pollution from certain products such as car oil and batteries; prolongs the life of limited reserves of other natural resources such as wood; saves energy: gives jobs to hundreds of people by creating new industries
Activity 6:
Students’ own answers
Unit 1 Module B
Activity 1:
a air pollution, noise pollution, water pollution
b The telephone is ringing, his sister is playing
the drums, his mother is calling them, his mp3 headphones are at top volume
c hypertension, stress, sleep disturbances and
hearing loss.
d It can cause death to several species, and some
may become extinct; whales may get stranded
on the beach.
Activity 2:
a think; b doesn’t; c can be; d can’t
Activity 3:
a 1, 2, 3, 4; b 1, 2, 3, 4; c 2, 3; d 2, 3
Activity 4:
Students’ own answers
Activity 5:
Students’ own answers
Unit 2 Module A
Activity 1:
a 4; b 3; c 1; d 2
plastic
a
paper and
glass, cloth and metal
b c
d
Trang 2Activity 2:
a Fossil fuels are remains formed millions of years
ago from plants and animals that died and
disintegrated under tons of soil and rock The
most important types are coal, oil and
natural gas.
b Coal is used to produce electricity Oil enables
us to use means of transport Natural gas is
mainly used to produce heat, for industrial
processes and, in some countries, it is used as
fuel as well.
Activity 3:
a T; b T; c F; d F
Activity 4:
a 5; b 1; c 4; d 2; e 6; f 3
Activity 5:
Suggested answers: a Natural gas is mainly
used for heating and industrial processes.;
b Lights in a room contribute to global warming.
Activity 6:
Students’ own answers
Unit 2 Module B
Activity 1:
a T; b F; c T; d F; e F; f T; g T; h F
Activity 2:
a physician; b fever; c work; d techniques;
e disease; f ordered; g greatly; h views
Activity 3:
Name: Louis Pasteur
Born in: 1822
Died: 1895
Nationality: French Occupation: chemist and microbiologist Theory: the relevance of germ theory to infectious disease, surgery, hospital management, agriculture and industry / germ theory of disease Early 1860s: began working on fermentation Demonstration: yeast is a microorganism that converts sugar into alcohol
Discovery: pasteurisation
Activity 4:
Students’ own answers
Activity 5:
Students’ own answers
Unit 3 Module A
Activity 1:
They show a forest fire, a tornado and a volcano
A forest fire may happen naturally or be caused
by man A tornado and a volcano eruption happen naturally.
Students’ own answers
Activity 2:
a The greenhouse effect is a natural
phenomenon but it is enhanced by man.
b Because the process is the same as that in a
greenhouse
c It leads to an increase in the levels
of greenhouse gases (carbon dioxide, methane, nitrous oxide, water vapour and chlorofluorocarbons) in the atmosphere.
d Global warming has changed the Earth’s
atmospheric balance with effects in Polar Regions Part of the ice caps is melting, raising the height of the world’s oceans and producing floods in low-lying areas of the world
Trang 3e The causes of global warming are human
activities such as the burning of fossil
fuels, deforestation, the use of fertilisers in
agriculture, decomposition of garbage and the
use of refrigerators and air conditioners.
Activity 3:
a increase; b cool off; c atmosphere;
d balance
Activity 4:
a 3; b 1; c 2
Activity 5:
a .radiating heat energy (infrared
radiation) back up towards space.; b …the
levels of greenhouse gases (carbon dioxide,
methane, nitrous oxide, water vapour and
chlorofluorocarbons) in the atmosphere.; c …the
enhanced greenhouse effect.; d …the enhanced
greenhouse effect / global warming.; e …has
affected the Polar Regions.; f .floods in
low-lying areas of the world.
Activity 6:
Students’ own answers
Unit 3 Module B
Activity 1:
Students’ own answers
Activity 2:
a .addicted to baseball.; b .went to the
game.; c .practises sports all day long.;
d .steroids are very dangerous.; e .perhaps
Ed just loves sports.
Activity 3:
Students’ own answers
Activity 4:
Students’ own answers
Unit 4 Module A
Activity 1:
a 1; b 3; c 4; d 2
Activity 2:
a Correct; b Turbines transform wind into
power but they need to be installed where wind
blows at constant speed.; c Hydroelectric plants
kill fish because they change water level and
temperature.; d Rubbish pollutes the air when it
is burned.
Activity 3:
Activity 4:
Students’ own answers
Activity 5:
Students’ own answers
Activity 6:
Students’ own answers
Source of energy Advantages Disadvantages
only available where sun shines
sunlight unlimited / non polluting
only available where wind blows at constant speed
wind provides power for many
people
affects ecology water inexpensive / non polluting
highly polluting rubbish abundant / cheap
Trang 4Unit 4 Module B
Activity 1:
Students’ own answers
Activity 2:
a Bulimia and anorexia.
b The ideal of a perfect body
c Mass media, peers’ influence, excessive
concern, obsession with physical appearance, a
distorted body image, society…
Activity 3:
a 3; b 2; c 1; d 4; e 5
Activity 4:
a 7; b 4; c 1; d 2; e 6; f 5; g 8; h 3
Activity 5:
Students’ own answers
Activity 6:
Students’ own answers