WorksheetsC11 History of the Earths Atmosphere & Today's Atmosphere
Total questions: 25
Worksheet time: 13mins
When was the Earth's atmosphere formed
4.6 billion years ago
4.6 million years ago
46 billion years ago
46 million years ago
On theory suggests that volcanoes released what gas/gases
water vapour
carbon dioxide
oxygen
nitrogen
What theories are used to explain where water came from
water vapour condensed as the Earth cooled
water leaked out from the Earth's core
icy comets rained down on the surface of the Earth
As the Earth stabilised, what was the main gas of the atmosphere
methane
nitrogen
oxygen
carbon dioxide
As the Earth stabilised, what other gases could have been present other than carbon dioxide?
hydrogen
water vapour
nitrogen
methane
ammonia
What gas was there little to none in the early Earth's atmosphere?
argon
helium
oxygen
hydorgen
When do scientist believe that life started to form?
3.4 billion years ago
5.7 billion years ago
9.8 billion years ago
1 billion years ago
What were the first life forms on Earth
weeds
algea
bacteria
cockroaches
What did the simple organisms similar to bacteria evolve to
tadpols
algae
ants
seaweed
Approximately when did the evolution of simple organisms happen?
2.7 billion years ago
0.7 billion years ago
4.2 billion years ago
1.7 billion years ago
Where did algae get there energy from?
Chemosynthesis
Respiration
Photosynthesis
The gas did photosynthesis release into the atmosphere
argon
carbon dioxide
sulfur dioxide
oxygen
What happened to the oxygen levels over the next billion years or so
they stayed the same
they decreased steadily
they increased steadily
What happened as the more and more plants evolved?
removed oxygen, and released oxygen
removed nitrogen, and released hydrogen
removed oxygen, and released carbon dioxide
removed carbon dioxide, and released oxygen
Complete this equations:
Carbon Dioxide + Water --->
oxygen + nitrogen
glucose + oxygen
glucose + carbon
methane + oxygen
What happened to the Earths earliest living microorganisms as the oxygen levels rose?
evolved
largely died out
continued to survive
What happened to the methane and ammonia that was present in the Earth's early atmosphere?
reacted with oxygen, removing methane and ammonia from the atmosphere
locked into rocks
dissolved into seas
What happened to the levels of nitrogen in the atmosphere?
disappeared
decreased
increased
Why did the levels of nitrogen increase?
ammonia reacted with oxygen creating nitrogen gas
volcanoes released nitrogen
methane reacted with oxygen creating nitrogen gas
photosynthesis added to the amount of nitrogen in the atmosphere
What happened 200 million years ago?
dinosaurs roamed the earth
first flower blossomed
proportion of gases in the Earth's atmosphere stabilised
proportions of gases in the Earth's atmosphere drastically changed
What percentage of nitrogen is present in today's atmosphere?
48
58
68
78
What percentage of oxygen is present in today's atmosphere?
31
21
11
51
What percentage of argon is present in today's atmosphere?
0.6
0.7
08
0.9
What other noble gases are present in today's atmosphere?
neon
krypton
xenon
helium
What led to the reduction of carbon dioxide in the atmosphere?
photosynthesis
formation of sedimentary rocks
carbon dioxide dissolving into oceans
respiration
