Earth's Resources and Human Impact

The graph shows changes in carbon dioxide

(CO2) concentrations and surface temperatures

on Earth from the years 1880 to 2000.

Why do carbon dioxide concentrations and

surface temperatures show the relationship seen

in the graph?

• because lower carbon dioxide levels mean more

  heat is retained in Earth's atmosphere

• because higher carbon dioxide levels mean

  more heat is retained in Earth's atmosphere

• because lower carbon dioxide levels mean less

  heat is retained in Earth's atmosphere

• because higher carbon dioxide levels mean less

  heat is retained in Earth's atmosphere

Who keeps the Earth warm?

• The Sun

• The greenhouse gases

• Both of them

• None of them

According to the bar chart, which of the following gases are the top 2 major contributors to the greenhouse effect?

• Carbon dioxid and methane

• Methan and argon

• Carbon dioxide and argon

• argon and nitrous oxide

The most abundant greenhouse gas is _______________.

• oxygen

• nitrogen

• carbon dioxide

• all of the above

These gases trap and hold energy of the sun in the atmosphere around the Earth and heat it.

• gasoline

• Greenhouse Gases
• Fossil Fuels
• Oil

The graph shows changes in carbon dioxide

(CO2) concentrations and surface temperatures

on Earth from the years 1880 to 2000.

Why are carbon dioxide concentrations and

surface temperatures correlated

in the graph?

• because lower carbon dioxide levels mean more

  heat is retained in Earth's atmosphere

• because higher carbon dioxide levels mean

  more heat is retained in Earth's atmosphere

• because lower carbon dioxide levels mean less

  heat is retained in Earth's atmosphere

• because higher carbon dioxide levels mean less

  heat is retained in Earth's atmosphere

Which of the following is NOT considered a greenhouse gas?

• Methane

• Oxygen

• Carbon dioxide

• Water vapor

Which of the following options would be the most reasonable change that could result from an increase in the burning of fossil fuels?    

• More trees will be chopped down
• There would be a global rise in temperatures
•  Ecosystems would become more diverse
• Rates of photosynthesis would decrease.

Which of the following is a major effect of increased greenhouse gases in the atmosphere?

• Lower sea levels

• Rising global temperatures

• More snowfall

• Decreased plant growth

What helps keep our Earth's surface warm?

• greenhouse effect

• the moon

• ocean tides

• the seasons