Sea Level Change (mm)

250
200 -
150 -
100 -
50 -
0 -
-50
1900 1920 1940 1960 1980 2000 2020

Factors Contributing to Sea Level Change:
- Global dam projects
- Mountain glaciers
- Greenland Ice
- Greenland & Antarctic Ice Sheets
- Thermal expansion

Data Source: Frederikse et al. (2020)
Credit: NASA's Goddard Space Flight Center/PO.DAAC
2021 NASA's Goddard Space Flight Center

Which factor led to an increase in sea levels between 1960 and 1980?

A. Freezing mountain glaciers
B. Freezing Antarctic ice sheets
C. Global dam projects
D. Thermal expansion



Answer :

Final answer:

Thermal expansion of ocean water led to an increase in sea levels between 1960 and 1980.


Explanation:

Thermal expansion of ocean water contributed to the increase in sea levels between 1960 and 1980. As water warms, the molecules gain more kinetic energy and move farther apart, causing sea levels to rise. This phenomenon, along with melting mountain glaciers, plays a significant role in sea level changes.


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