Making bubbles
This activity will teach your child to enjoy science.
1. Mix 8 tablespoons of dishwashing liquid in 1 quart of water in a
shallow pan.
2. Blow through a straw as you move it slowly across the top of the
liquid.
3. When you've made a bubble, touch it gently with a wet finger. What
happens? Touch another bubble with a dry finger. What happens?
4. Look at the bubbles. How many colors do you see? What do the colors
remind you of?
5. Try making bubbles with a tin can (don't cut yourself) open at both ends. Dip the can into the soapy solution so that you get a soap "window" across one end when you pull it out. Blow gently on the other end to form a bubble. You can use wider tubes such as coffee cans to make still bigger bubbles.
Bubbles are bits of air or gas trapped inside a liquid ball. The surface of a bubble is very thin. Bubbles are particularly fragile when a dry object touches them. That's because soap film tends to stick to the object, which puts a strain on the bubble. So if you want your bubbles to last longer, keep everything wet, even the sides of the straw.
Science activities:
Creepy Crawlies! for beginning scientists
Plants and Light for more advanced scientists
Source: Helping Your Child Learn Science.
For more information, please contact the National Library of Education,
555 New Jersey Avenue, NW, Washington, DC 20208, telephone
1-800-424-1616.