what proportions of different gases are in the atmosphere today?
Nitrogen about 80%
Oxygen about 20%
other gases (CO2 and water vapor) <1%
1 of 10
what is the history of the Earth's atmosphere?
1. volcanic activity
2. H2O (g) condensated and formed oceans, CO2 dissolved in oceans
3. CO2 formed carbon participates -> sedimentary rock
4. plants/algae uses CO2 to photosynthesize
5. increase in oxygen allowed other species to evolve
2 of 10
what is the word equation for photosynthesis?
Carbon dioxide + water -> glucose + oxygen
3 of 10
how did CO2 levels decrease?
1. dissolved in water
2. photosynthesis
4 of 10
what is the greenhouse effect?
+
how is it contributing to global warming?
1. greenhouse effect helps retain heat on Earth
2. too many gases are blocking the heat from escaping the Earth's atmosphere
5 of 10
what are examples of greenhouse gases and how they're emitted:
CO2- burning fossil fuels, deforestation
methane- farming cattle, farming rice paddy fields (microorganisms that live there produce methane)
6 of 10
what is global climate change?
1. an increase in the average global temperature
7 of 10
what are the 4 potential effects of global climate change?
1. glaciers and polar ice melting
2. sea levels rising
3. patterns of rainfall changing, producing floods or droughts
4. habitats changing
8 of 10
what is a carbon footprint and how can it be reduced?
carbon footprint: total amount of CO2 emitted over the full life cycle of a product/ service etc.
1. walking, eating seasonally, turn off lights etc.
9 of 10
what are the equations for complete and incomplete combustion?
1. volcanic activity
2. H2O (g) condensated and formed oceans, CO2 dissolved in oceans
3. CO2 formed carbon participates -> sedimentary rock
4. plants/algae uses CO2 to photosynthesize
5. increase in oxygen allowed other species to evolve
Card 3
Front
what is the word equation for photosynthesis?
Back
Card 4
Front
how did CO2 levels decrease?
Back
Card 5
Front
what is the greenhouse effect?
+
how is it contributing to global warming?
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