MATERIALS:
Paper clips
Water
Bowl
INSTRUCTIONS:
- Fill the bowl with water.
- Unfold one paper clip to use as a tool.
- Rest another clip on the tool.
- Gently lay the clip flat on the water, then remove the tool.
- The paper clip should float.
WHY:
Water holds together at its surface with a kind of rubbery “skin”. This tendency of a liquid to form a skin, called "surface tension", is what keeps the paper clip up.
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