The Early Atmosphere

Question 1

Describe the formation of the early atmosphere

1

Answer 1

Eruptions of volcanoes

Question 2

Describe the composition of the early atmosphere

3

Answer 2

Little oxygen
Lots of CO2
Little nitrogen

Question 3

Describe two functions of the atmosphere

2

Answer 3

Reflects heat back to earth

Removes some UV radiation from sunlight

Question 4

Explain how cooling affected the atmosphere

3

Answer 4

Cooling caused condensation of water vapour
Rain formed oceans
Water vapour removed from atmosphere

Question 5

Write the word equation for photosynthesis

Answer 5

Carbon dioxide + water -> glucose + oxygen

Question 6

Write the symbol equation for photosynthesis

Answer 6

6Co2+ 6H2O-> C6H12O6+ 6O2

Question 7

Describe the test for oxygen gas

Answer 7

Delights a glowing splint

Question 8

Describe the test for carbon dioxide gas

Answer 8

Turns limewater colourless

Question 9

Describe two effects of global warming

Answer 9

Climate change

Melting of ice caps

Question 10

Explain 2 ways to reduce the impact of global warming

Answer 10

Iron seeding

Carbon capture

Question 11

Word equation for reapiration

Answer 11

Glucose + oxygen -> carbon dioxide + water

Question 12

Word equation for combustion

Answer 12

Hydrocarbon + oxygen -> carbon dioxide + water

Question 13

The actions of humans are causing global warming by

Answer 13

Increase in global temp

Correlation between carbon dioxide levels on earth

Question 14

What is climate change

Answer 14

Changes in water pattern

Believed to be causing the effects of global warming

Question 15

What is a green house gas

Answer 15

Reflection of heat back to earth by greenhouse gasses in the atmosphere