The graph shows that temperature and carbon dioxide
levels both started to increase around 144,000 to 146,000
5. Which of these two variables appears to have peaked
The graphs also indicate temperature and carbon dioxide
amounts both peaked around 133,000 to 135,000 years
6. Which of these two variables appears to have begun
! Move your cursor over the graph to highlight the
period between 0 and 20,000 years ago.
7. Examine the relationship between temperature and
CO2 for the period from 20,000 years ago to the present.
Explain what you observe.
8. Based on your observations, hypothesize about the
relationship between temperature and the amount of CO2
in the atmosphere.