Question

the graph shows data from ice cores.
atmospheric carbon dioxide from law dome ice cores
which claim does the graph support?
a. co₂ levels are unrelated to global warming on earth.
b. it takes millions of years to change earths co₂ levels.
c. neither co₂ levels nor temperatures are changing on earth.
d. earths co₂ levels have increased at a quicker rate during the last

Explanation:

Looking at the graph, we can see that the CO₂ levels were relatively stable for a long time (from around 1000 - 1800 AD). But after 1800 AD, the line (representing CO₂ levels) rises sharply.

• Option A: The graph does not give any information about the relation between CO₂ levels and global warming. So, we cannot say that CO₂ levels are unrelated to global warming from this graph.
• Option B: The x - axis of the graph shows years from 1000 - 2000 AD (a span of 1000 years). It does not show a time - scale of millions of years. So, we cannot conclude that it takes millions of years to change Earth’s CO₂ levels from this graph.
• Option C: The graph clearly shows that CO₂ levels are changing (rising after 1800 AD). So, this option is incorrect.
• Option D: Since the CO₂ level line rises sharply after 1800 AD compared to the relatively stable levels before 1800 AD, we can say that Earth’s CO₂ levels have increased at a quicker rate during the last part of the time - period shown (after 1800 AD).

Answer:

D. Earth’s CO₂ levels have increased at a quicker rate during the last