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Water Surface Tension Paperclip Float Experiment Lab Sheet
A paperclip sitting on top of water sounds impossible until your student actually does it. This water surface tension paperclip float experiment makes the invisible physics of molecular attraction something kids can see, test, and break on purpose.
Students investigate how water molecules create a surface film strong enough to support a small metal paperclip. The lab sheet walks your homeschooler through writing a hypothesis, following a six-step procedure using a glass or bowl of water, and recording results across three test conditions: plain water, one drop of dish soap, and two to three drops of dish soap. It suits grades 3 to 6 and takes roughly twenty to thirty minutes from setup to reflection.
The water surface tension paperclip float lab works well as a standalone lesson on physical science or as part of a broader unit study on states of matter or molecular bonds. Four reflection questions push students past observation into explanation, asking why the paperclip floated, what the soap did to the surface, and where surface tension appears in nature. Completing the sheet demonstrates both careful observation and basic experimental reasoning.
Can a paperclip float? This water surface tension paperclip float lab guides grades 3-6 through hands-on testing with dish soap. Download free.
Investigating the Water Surface Tension Paperclip Float Setup
Usage Notes
Nearly everything on the materials list is already in your kitchen: a regular paperclip, a clear glass or bowl, water, and dish soap. The optional dropper helps control how much soap enters the water, which matters for the multi-condition results table. Adult supervision is noted at the bottom of the sheet because water spills are likely and young students should not handle glassware alone.
Printing Tips
Cardstock holds up well here since students may have wet hands mid-experiment. A loose sheet on a clipboard next to the sink keeps the recording area flat and away from the bowl, and the results table has enough row space for comfortable pencil writing without laminating.