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MS1 (2)

- (1) Gases in the atmosphere trap heat from the sun

- (1) Resulting in an increase in the average temperature of the Earth

MS2 (3)

- (1) Deforestation reduces the number of trees, which absorb CO2

- (1) Less CO2 absorption leads to an increase in atmospheric CO2 levels

- (1) CO2 is a greenhouse gas, contributing to the greenhouse effect

MS3 (2)

- (2) Solar energy

MS4 (4)

- (1) Calculate moles of CH4: 250 / 16 = 15.625 moles (2)

- (1) Calculate moles of CO2: 15.625 moles (from equation)

- (1) Calculate mass of CO2: 15.625 moles x 44 g/mol = 687.5 g

MS5 (3)

- (1) Burning fossil fuels releases CO2 into the atmosphere

- (1) This increases atmospheric CO2 levels

- (1) CO2 is a greenhouse gas, contributing to the greenhouse effect

MS6 (2)

- (1) Positive feedback loops amplify the effects of climate change

- (1) Negative feedback loops reduce the effects of climate change

MS7 (3)

- (1) Increased temperatures cause glaciers and ice caps to melt

- (1) Melting ice increases the volume of water in the oceans

- (1) Resulting in a rise in sea levels

MS8 (4)

- (1) Calculate energy required: 2500 g x 4.18 J/g°C x (50 - 20) = 298,000 J (2)

- (1) Calculate temperature change: 298,000 J / (2500 g x 4.18 J/g°C) = 30°C

MS9 (3)

- (1) Some refrigerants are greenhouse gases

- (1) When released into the atmosphere, they trap heat

- (1) Contributing to the greenhouse effect and climate change

MS10 (2)

- (2) Using renewable energy sources

- (2) Reducing deforestation

- (2) Improving energy efficiency