8 Questions
What would be the average annual temperature increase if the Earth's temperature rises by 2°C over the next 100 years?
0.02°C per year
How often does Earth complete a full rotation on its axis?
Once every 24 hours
What is the Earth's primary source of heat energy?
Solar radiation
Which of the following describes an abundant greenhouse gas in Earth's atmosphere?
Carbon dioxide
What percentage of solar radiation-generated heat escapes into space?
60-80 percent
What are the correct proportions for the major gases in Earth's atmosphere?
78% nitrogen, 21% oxygen, 0.04% carbon dioxide, 0.9% other gases
How does Earth's axial tilt affect the seasons?
When Earth is tilted towards the sun, summer will be hotter, resulting in longer days and shorter nights.
What occurs at the boundary where the troposphere ends and the stratosphere begins?
The temperature starts to rise.
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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