Climate Change

 What is the greenhouse effect?

• The warming of a planet due to trapped radiation.

• The cooling of Earth due to air pollution.

• The heating of a solid, such as a rock.

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The average temperature of the surface of Earth has increased approximately 1°C in the past century. Which reason best explains this increase in temperature?

• lower levels of ozone in the atmosphere

• lower levels of nitrogen in the atmosphere

• higher levels of carbon dioxide in the atmosphere

• higher levels of oxygen in the atmosphere

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Carbon Dioxide is important in our atmosphere because it is required for photosynthesis and traps some heat, keeping the Earth warm. However, human produced carbon dioxide is a problem because it

• leads to higher global temperatures.

• disrupts the natural cycling of other greenhouse gases.

• add too much carbon dioxide to the oceans.

• causes uncontrolled photosynthesis.

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Earth's climate can be affected by natural factors such as changes in volcanic activity, solar output and Earth's orbit around the sun. Climate change can also be caused by human activities such as burning fossil fuels and the conversion of land for forestry and agriculture. The increase of which greenhouse gas due to human activity has had the greatest impact on global climate in the past century?

• Carbon Dioxide

• Methane

• Ozone

• Water Vapor

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Which of the following is contributing to an INCREASE in carbon dioxide in the atmosphere?

• deforestation

• photosynthesis

• oceans

• all of the above

• the loss of animal species

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Some greenhouse gases are naturally present in the Earth's atmosphere

• True

• False

Since the beginning of the Industrial Revolution the acidity of ocean surfaces has increased by about 30%, mainly due to human output of Carbon Dioxide. Which would NOT contribute to ocean acidification?

• consuming electricity

• coral reef erosion

• deforestation

• transportation

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The activities that take place to meet human needs can often be harmful to ecosystems. By developing sustainable practices, however, we can help protect our environment. Which of the following changes would be most helpful in reaching sustainability?

• Building more water treatment facilities

• Planting trees to replace those that are cut down by logging

• Using natural gas instead of petroleum

• Tilling the land to improve the soil quality

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The carbon dioxide concentration in the year 2000 was measured at 370 ppm. Scientific models predict that the atmospheric carbon dioxide level will increase to 500 ppm in the year 2050. Based on the trends in the graphs, will the air temperature be higher or lower in 2050 than it was in 2000?

• Higher

• Lower

• Stay the same

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Describe the relationship between carbon dioxide levels and average global temperatures.

• As carbon dioxide levels increase, temperature increases.

• As carbon dioxide levels increase, temperature decreases.

• As carbon dioxide levels decrease, temperature increases.

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