Chemistry of the Atmosphere

Chemistry of the Atmosphere
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Slide 1: Slide
ChemistryUpper Secondary (Key Stage 4)GCSE

This lesson contains 25 slides, with interactive quizzes and text slides.

time-iconLesson duration is: 30 min

Items in this lesson

Chemistry of the Atmosphere

Slide 1 - Slide

For 200 million years, the proportions of different gases in the atmosphere have been much the same as they are today.

  1.  80% is Nitrogen
  2.  20% Oxygen
  3. small proportions of various other gases, including carbon dioxide, water vapour and noble gases.

Our current atmosphere.

Slide 2 - Slide

What is the most abundant gas in the Earth's atmosphere?
A
Nitrogen
B
Argon
C
Oxygen
D
Carbon dioxide

Slide 3 - Quiz

Which gas is responsible for the greenhouse effect?
A
Methane
B
Oxygen
C
Nitrogen
D
Carbon dioxide

Slide 4 - Quiz

What is the approximate percentage of oxygen in the atmosphere?
A
1%
B
50%
C
78%
D
21%

Slide 5 - Quiz

What is the role of argon in the atmosphere?
A
It is essential for respiration
B
It contributes to the greenhouse effect
C
It supports combustion
D
It is a non-reactive gas

Slide 6 - Quiz

Describe the composition of our atmosphere.

Slide 7 - Open question

Evidence is limited because of the time scale of 4.6 billion years and theories have changed/developed over time.
One theory suggests that during the first billion years of the Earth’s existence…
o There was intense volcanic activity that released gases that formed the
early atmosphere
At the start of this period, the atmosphere may have been like the
atmospheres of Mars and Venus today: mainly CO2 with little or
no O2  (g)
Volcanoes also produced nitrogen (N2) which gradually built up in
the atmosphere & there may have been small proportions of
methane (CH4) and ammonia (NH3
▪ CO2 dissolved in the water and carbonates were precipitated
producing sediments, reducing the amount of CO2 in the atmosphere. 
Water vapour condensed to form the oceans
Algae & plants produced the Othat is now in the atmosphere by photosynthesis.
 Algae first produced oxygen about 2.7 billion years ago and soon after this oxygen appeared in the atmosphere.
 Over the next billion years plants evolved and the % oxygen gradually increased to a level that enabled animals to evolve.
Algae and plants decreased the % CO2 in the atmosphere by photosynthesis 
CO2 was also decreased by the formation of sedimentary rocks that contain carbon.
The production of fossil fuels from the remains of dead plants and animals reduced the amount of CO2 in the atmosphere.

Slide 8 - Slide

Why is evidence limited for the composition of Earth's early atmosphere.

Slide 9 - Open question

What effect did volcanoes have on the earth Earth's atmosphere?

Slide 10 - Open question

Early Earth's atmosphere was similar to
A
Earth and Mars
B
Mars and Venus
C
Saturn and Mars
D
Mars and Mercury

Slide 11 - Quiz

Which gas did volcanoes release which makes up a lot of our atmosphere now?
A
Oxygen
B
Carbon Dioxide
C
Methane
D
Nitrogen

Slide 12 - Quiz

Which living things created oxygen in the atmosphere?
A
Animals
B
Shellfish and molluscs
C
Plants and algae
D
Plants and animals

Slide 13 - Quiz

Name the process by which algae and plants which releases oxygen into the atmosphere?
A
respiration
B
Aerobic respiration
C
Anaerobic respiration
D
Photosynthesis

Slide 14 - Quiz

Which type of rock decreases the amount of Carbon Dioxide in the atmosphere?
A
metapmorphic
B
igneous
C
sedimentary
D
sedentary

Slide 15 - Quiz

Fossil fuels are made from
A
Plants
B
Bones
C
Flesh of dinosaurs
D
Plants and animals

Slide 16 - Quiz

Discuss how carbon dioxide is reduced from the atmosphere (there are 3 ways)

Slide 17 - Open question

Describe which living creatures released oxygen into the atmosphere

Slide 18 - Open question

Describe how the oceans were formed.

Slide 19 - Open question

What are the three main types of fossil fuels?
A
Solar, wind, hydroelectric
B
Coal, oil, natural gas
C
Coal, uranium, shale gas
D
Geothermal, biomass, nuclear

Slide 20 - Quiz

Which fossil fuel is the most abundant globally?
A
Coal
B
Uranium
C
Oil
D
Natural gas

Slide 21 - Quiz

What is the primary use of fossil fuels?
A
Textile production
B
Food production
C
Energy production
D
Medicine manufacturing

Slide 22 - Quiz

What process do algae use to form oxygen in the atmosphere?
A
Combustion
B
Fermentation
C
Photosynthesis
D
Respiration

Slide 23 - Quiz

What is the primary source of oxygen production in the Earth's atmosphere?
A
Bacteria
B
Fungi
C
Algae
D
Moss

Slide 24 - Quiz

Which environmental factor is crucial for algae to produce oxygen?
A
Sunlight
B
Extreme Cold
C
Acid Rain
D
Pollution

Slide 25 - Quiz