选修6-global-warming-单元PPT课件
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How does it work
CHENLI
16
Greenhouse gases?
In the atmosphere surrounding the earth there are gases, which are called “greenhouse gases”, mainly including _c_ar_b_o_n__di_o_x_id_e_, and water vapor(水蒸气).
energy sources
CHENLI
3
cassette player micro-wave oven
heating
fridge
things that
light
use in
eysnoteourrvgey
hairdryer
home
television computer
stove
video player washing machine
It is known as__g_r_ee_n_h__o_u_se__e_ff_e_c_t___.
Nowadays our earth is becoming
_w_a_r_m__e_r_a_n_d__w_a_r_m__e_r_.
CHENLI
19
P26 The Earth is Becoming Warmer --- But Does It Matter?
CHENLI
17
Carbon dioxide Methane Water vapor
CHENLI
18
What do you think greenhouse gases do?
Greenhouse gases perform the same function as the _g_l_a_ss__in a greenhouse --- Theyt_r_a_p___the heat of the sun and therefore _w_a_r_m___the earth.
for growing plants,
especially during cold
weather.
CHENLI
15
The glass traps the heat from the sun, making the air warm so that plants can grow better.
trap…from…: keep sth in a place 存住…中的…
CHENLI
20
Fast reading
This article is from ________. a. a magazine b. the internet c. a book
carnotite（钒钾铀矿）, pictured here.
Guess it!
CHENLI
10
What source of energy?
GeCHyENsLIers(间歇泉)
11
Geothermal (地热的) Energy Plant
CHENLI
12
Discuss
An energy source is “renewable” when supplies of it never run out and “nonrenewable” when one day they will run out. Which energy sources on your list are renewable and which are non-renewable?
CHENLI
13
non-renewable
CHENLI
renewable
14
What are these buildings made of and what are they called?
glass / greenhouse
What’s the use?
A greenhouse is used
Unit 4 Global Warming
warming-up&Reading
CHENLI
1
Which is the most important to a country?
•Money? •Technology?
•Man power?
•Energy sources?
•International relations?
The Hydroelectric dams
are used to keep back water and raise its level for irrigation or for producing electricity, etc.
CHENLI
9
Uranium Ore (铀矿石)
The element uranium does not occur in pure form in nature but is found in minerals such as
•…
CHENLI
2
We depend on energy to do many things in our daily lives. For example, energy lights our cities and heats our buildings. Make a list of things that use energy in your home, in your school, or any other places you can think of.
6
A nuclear power plant
a facility designed to convert nuclear energy into electricity.
ቤተ መጻሕፍቲ ባይዱ
CHENLI
7
Solar panels
on the roof of a house on a bright sunny day are used to collect solar energy, making your house warm or CHENLIheating your wate8r.
CHENLI
4
Windmills
Wind energy is used as power to
produce electricity .
CHENLI
5
The coal power stations
where electricity is produced by burning coals.
CHENLI
CHENLI
16
Greenhouse gases?
In the atmosphere surrounding the earth there are gases, which are called “greenhouse gases”, mainly including _c_ar_b_o_n__di_o_x_id_e_, and water vapor(水蒸气).
energy sources
CHENLI
3
cassette player micro-wave oven
heating
fridge
things that
light
use in
eysnoteourrvgey
hairdryer
home
television computer
stove
video player washing machine
It is known as__g_r_ee_n_h__o_u_se__e_ff_e_c_t___.
Nowadays our earth is becoming
_w_a_r_m__e_r_a_n_d__w_a_r_m__e_r_.
CHENLI
19
P26 The Earth is Becoming Warmer --- But Does It Matter?
CHENLI
17
Carbon dioxide Methane Water vapor
CHENLI
18
What do you think greenhouse gases do?
Greenhouse gases perform the same function as the _g_l_a_ss__in a greenhouse --- Theyt_r_a_p___the heat of the sun and therefore _w_a_r_m___the earth.
for growing plants,
especially during cold
weather.
CHENLI
15
The glass traps the heat from the sun, making the air warm so that plants can grow better.
trap…from…: keep sth in a place 存住…中的…
CHENLI
20
Fast reading
This article is from ________. a. a magazine b. the internet c. a book
carnotite（钒钾铀矿）, pictured here.
Guess it!
CHENLI
10
What source of energy?
GeCHyENsLIers(间歇泉)
11
Geothermal (地热的) Energy Plant
CHENLI
12
Discuss
An energy source is “renewable” when supplies of it never run out and “nonrenewable” when one day they will run out. Which energy sources on your list are renewable and which are non-renewable?
CHENLI
13
non-renewable
CHENLI
renewable
14
What are these buildings made of and what are they called?
glass / greenhouse
What’s the use?
A greenhouse is used
Unit 4 Global Warming
warming-up&Reading
CHENLI
1
Which is the most important to a country?
•Money? •Technology?
•Man power?
•Energy sources?
•International relations?
The Hydroelectric dams
are used to keep back water and raise its level for irrigation or for producing electricity, etc.
CHENLI
9
Uranium Ore (铀矿石)
The element uranium does not occur in pure form in nature but is found in minerals such as
•…
CHENLI
2
We depend on energy to do many things in our daily lives. For example, energy lights our cities and heats our buildings. Make a list of things that use energy in your home, in your school, or any other places you can think of.
6
A nuclear power plant
a facility designed to convert nuclear energy into electricity.
ቤተ መጻሕፍቲ ባይዱ
CHENLI
7
Solar panels
on the roof of a house on a bright sunny day are used to collect solar energy, making your house warm or CHENLIheating your wate8r.
CHENLI
4
Windmills
Wind energy is used as power to
produce electricity .
CHENLI
5
The coal power stations
where electricity is produced by burning coals.
CHENLI