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Questions and Answers
What would be the average annual temperature increase if the Earth's temperature rises by 2°C over the next 100 years?
What would be the average annual temperature increase if the Earth's temperature rises by 2°C over the next 100 years?
- 2°C per year
- 0.002°C per year
- 0.02°C per year (correct)
- 0.2°C per year
How often does Earth complete a full rotation on its axis?
How often does Earth complete a full rotation on its axis?
- Once every 12 hours
- Once every 24 hours (correct)
- Once a year
- Twice a day
What is the Earth's primary source of heat energy?
What is the Earth's primary source of heat energy?
- Solar radiation (correct)
- Radioactive decay
- The inner core of the Earth
- Running water
Which of the following describes an abundant greenhouse gas in Earth's atmosphere?
Which of the following describes an abundant greenhouse gas in Earth's atmosphere?
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What percentage of solar radiation-generated heat escapes into space?
What percentage of solar radiation-generated heat escapes into space?
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What are the correct proportions for the major gases in Earth's atmosphere?
What are the correct proportions for the major gases in Earth's atmosphere?
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How does Earth's axial tilt affect the seasons?
How does Earth's axial tilt affect the seasons?
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What occurs at the boundary where the troposphere ends and the stratosphere begins?
What occurs at the boundary where the troposphere ends and the stratosphere begins?
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Study Notes
Climate Change Test
- A 2°C average planet temperature change over the next 100 years would be a rise of 0.02°C per year.
- The Earth rotates on its axis once every 24 hours.
Sources of Heat Energy
- The primary source of heat energy received at Earth's surface is solar radiation.
Greenhouse Gases
- Carbon dioxide is the most abundant greenhouse gas in Earth's atmosphere.
- Methane is another greenhouse gas.
Atmospheric Composition
- The atmosphere is composed of 78% nitrogen, 21% oxygen, 0.04% carbon dioxide, and 1% of other gases.
Seasonal Changes
- Seasons change due to the tilt of the Earth's axis, resulting in variations in temperature and daylight hours.
Atmospheric Layers
- The troposphere ends and the stratosphere begins where the temperature starts to rise.
Infrared Radiation and CO2
- Increased infrared radiation is a result of increased infrared heat and a higher amount of CO2.
Feedback Loops
- An example of a positive feedback loop is when rising temperatures at the poles cause glaciers to melt, leading to more water evaporation and changing people's behaviors.
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