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Experiment with water drops to see how molecules stick to themselves! Delicate Water Striders take advantage of surface tension.
Did you know that water molecules stick to each other? This characteristic is called cohesion. Try experiments to see what happens!
Cover your science area with newspaper. Fill a cup of water to the top. With a plastic dropper, add a few drops of water. Do you see how the water bulges over the top without spilling? The surface tension holds those additional drops. Keep adding drops until the tension breaks and spills over.
Compare how water tension reacts on different surfaces. Thickly color a small area of paper with Crayola Twistables®. Pile up water drops on the colored area and also on the plain paper. Which holds more drops before the surface tension breaks?
Insects called Water Striders use the surface tension of water to their advantage. They hunt prey by skimming the surface of still water. Find a picture of a Water Strider. Look at how its delicate feet pads rest on top of the water. Can you see how the water’s "skin" actually sinks under the insect’s light weight? Draw a Water Strider to show how it stands on the water’s surface.
People around the world give thanks for their food. Celebrate a harvest of pineapples, pumpkins, or pomegranates-and sho
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Imagination and problem-solving go to work as children check out real bugs and create their own.
Gild torn-paper edges and make golden leaf imprints on this decorative frame. Display original poetry, photos, or other
Storytelling and mathematics merge when students discover that by arranging and rearranging a set of seven geometric til
Paper-bag puppets hold original poetry about pirates, pets, or any preferred topic. Young writers put the puppet's arms
Display the 7 principles of Kwanzaa in a one-of-a-kind accordion window book.
Protection of the world’s tropical rainforests is a key environmental strategy for keeping the Earth healthy. Demonstrat
Picasso’s art career spanned many decades and included a variety of styles and influences. Create a portrait collage ins
Our crayons have been rolling off the assembly line since 1903, and you can see how it’s done.
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