Science Activity - teaching buoyancy

by Mary
(USA)

Just thought you might enjoy this idea for a lesson on submarines!

Water play is always well received and this can be used as a
science lesson to teach about bouyancy.

Submarine Sinks
Take an empty 2-liter soda bottle and let your students decorate it with markers. It should still be sheer enough to see through the bottle, though.

Let students fill it with one penny a piece.

Screw on the lid and place it in a tub of water.

Continue to do this until the submarine is submerged just below the surface.

You can take it out and fill it with more pennies, changing the weight to determine how low the sub sinks.

Use this chance to talk to your students about the concept of buoyancy and how submarines work.

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It's Mary from Preschool Planner:

http://www.mypreschoolplan.com/p/ar.html