Sometimes ice freezes with spikes growing out of the top. A brief video provides a scientific explanation for this. Then, it discusses the two different possible futures if ice didn't behave this way.

Concepts

ice, freezing points

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Additional Tags

science

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Instructional Ideas

• Attempt to create ice spikes in a freezer overnight
• Assign a creative writing task about what scholars think Earth would be like if ice sank instead of floated

Classroom Considerations

• Relies on prior knowledge of density

• This video is hosted on YouTube

Pros

• Includes subtitles in four languages for ease of note taking
• Details how to grow your own ice spikes
• Requires very little class time, so it makes a great supplement

Cons

• None

Common Core

SL.9-10.2 SL.11-12.2 RST.9-10.4 RST.11-12.4