Human Impact practice 2

In recent years, the human population has 

• increased exponentially
• decreased exponentially
• decreased slowly
• increased slowy

Which of the following is likely to be affected by a population of 7 billion?

• amount of land for agriculture
• amount of clean water
• number of people who are unemployed
• all of the above

Which human activity would preserve nonrenewable resources?

• deforestation
• removing carnivores from a forest 
• recycling
• heating homes with fossil fuels  

What are greenhouse gases?

• gases that cause climate change
• gases that emit green smoke
• gases that are used to make green colored glass

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

Which of the following is the best conclusion that can be made from this graph?

• atmospheric carbon dioxide levels have been decreasing since 1960
• Hawaii has a lot of carbon dioxide
• humans have been working hard to decrease carbon dioxide levels
• atmospheric carbon dioxide levels have increased steadily since 1960

Which of the following gases DOES NOT trap heat?

• carbon dioxide
• nitrogen
• water vapor
• methane

Which of the following have been linked to climate change?  

• droughts
• flooding
• melting of polar ice caps
• all of the above

Changes in temperature are expected to be greatest

• near the equator
• near the poles
• between the equator and the North Pole
• between the equator and the South Pole

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

• deforestation
• photosynthesis
• oceans
• all of the above