Instead, they can sense light through their skin. Why?Įarthworms don't have eyes like we do. The earthworms don't seem to be affected by the red light the same way they were by the 60 watt light bulb.
However, when you switch to the red light, you may notice some of the worms in each half of the box. The earthworms will move away from the bright light and remain in the dark half of the clothing box throughout the experiment. Did you see any differences in the way the earthworms reacted? Do they move toward the red light, or toward the darkness? Write or draw what you see in your notebook.Again, watch how the earthworms move for a few minutes. Release the earthworms once again in the center of the shoebox.Replace the 60 watt bulb from the lamp with a red light bulb.Did the worms travel to the darker side of the box, or the brighter side of the box? Write or draw what you see in your notebook.Observe, or carefully watch, the earthworms' behavior for a few minutes. Place your earthworms in the center of the shoebox.This can be accomplished by laying an old black t-shirt over the left half of the box. Make sure the other half of the box remains dark so that you can watch which side the earthworms crawl to.Shine the lamp over the right half of the shoebox by positioning it directly over the box. Take a small lamp and remove the shade.Do you think the earthworms will like bright light or red light better? Write down this guess in your notebook as well.Write this guess, called a hypothesis, in your notebook. Using your notes from step 5, make a guess about whether you think the earthworms will like light or darkness the best, and why.Where do they spend most of their time? Is it a dark place, or well-lit place? Write any notes in your notebook. Consider what you know about earthworms.Earthworms love moisture, so it's a good idea to make the environment comfortable for them before beginning your experiment. Spray the water to wet the soil a bit, so it's moist (lightly wet) instead of muddy.Rectangular boxes, such as shoeboxes or gift boxes from a department store, work well. If you don't have a shoebox, any type of box will do. Fill the bottom half of the shoebox with soil.If you can't find any in your yard, you can wait for a rainstorm (since they come out of the ground when it rains) or ask an adult to buy the worms from a bait and tackle shop. Dig in your backyard to collect your earthworms.
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