Science World
Science World for grades 6–10 brings science to life with fascinating feature articles and hands-on activities that reinforce science concepts and help students build test-taking and critical-thinking skills.

Global Warming Hands-On Activity

September 21, 2009

Iceberg Alert!

Predict: Will melting “icebergs” cause water levels to rise?

Ice cubes
Warm water

1. Fill a cup with ice cubes.
2. Pour warm water to the very top of the cup.
3. Observe the water level in the cup as the ice melts.

Once the ice cubes in your experiment melted, did the water from the cup overflow? Why or why not?

Water expands as it freezes. When it melts, water takes up less space. Do melting icebergs, or chunks of ice floating in the oceans, cause ocean levels to rise?

Not all ice floats in oceans. Huge sheets of ice cover land. If land-based ice melts, water will form rivers and flow into the ocean. Do you think this added water would raise ocean levels? If so, how might that affect coastal cities?

Keep Going!
Design an experiment that shows how melting landlocked ice would raise sea levels. Now test out your experiment.



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