8th Grade Global Warming Quizzes , Questions & Answers

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Keeling Curve Quiz: CO2 Trends, Seasons, and Carbon Baselines

This quiz explores the Keeling Curve, focusing on CO2 trends, seasonal variations, and carbon baselines. It evaluates your understanding of how atmospheric carbon dioxide levels change over time and the implications for climate...

Questions: 15 | Attempts: 14 | Last updated: Mar 23, 2026

Sample Question 1
What is the Keeling Curve?

A continuous record of atmospheric carbon dioxide concentrations measured at Mauna Loa, Hawaii, beginning in 1958

A graph showing the relationship between ocean temperature and sea level rise since 1900

A model used to predict future hurricane intensity based on sea surface temperatures

A record of global average temperature anomalies measured by weather satellites since 1979

Sample Question 2
What causes the regular seasonal oscillation visible in the Keeling Curve?

Ocean temperatures changing seasonally and releasing or absorbing different amounts of carbon dioxide

The seasonal cycle of photosynthesis and respiration in Northern Hemisphere plants, which absorbs carbon dioxide in summer and releases it in winter

Seasonal changes in human fossil fuel consumption, with more energy used for heating in winter

Variations in the Sun's energy output that follow an annual cycle

Sample Question 3
The overall upward trend in the Keeling Curve is primarily caused by natural volcanic emissions of carbon dioxide.

True

False

8th Grade Global Warming Quizzes , Questions & Answers

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