Experiments for Kids

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Sticky Situation

1.Pour a small puddle of water onto the smooth countertop.

2. Set the flat tray into the puddle, making sure there is no air trapped underneath.

3.Pull straight up on the tray. What happens?

You will find it difficult to lift the tray straight off the counter because of the adhesive force of the water.

Make a Rainbow

You will need tall, clear glass of water and a

flashlight

Hold the- flashlight beside the glass so that the beam is shining through the middle of the water.

Hold a piece of white paper beside the flashlight, and look for a rainbow on the paper. You may have to adjust the position of the paper to find it.

The glass of water acts like one large drop of water, bending the light and spreading out the colours. The rainbow that appears in front of the glass, spreading back toward the light source, is light that has been refracted and reflected twice, just like a rainbow. Another rainbow can be found behind the glass, made up of light that was refracted, but not reflected - light that passed right through the glass of water. It is this kind of refraction that can cause a rainbow around a light source, such as a ring around the Moon.

Create your own Crater

Gather together a large mixing bowl

dry plaster of paris (if unavailable, use flour)

several balls or small objects of different weights

spray bottle filled with water

Cover the bottom of the bowl with the dry plaster of paris to a depth of at least 5 cm (2 in).

Hold one of the balls about 1 m (3 ft) over the bowl and let it drop into the powder.

Examine the structure of the crater made by the impact of the ball.

Experiment by dropping the ball from different heights, and try balls of different sizes. What affects the size of the crater?

Make several impacts of different sizes until they begin overlapping and old craters begin to get destroyed by new ones. When the surface of the powder begins to look like the picture of the Moon's surface, you have created a "lunar landscape."

When you are satisfied with your lunar landscape, gently spray the surface with a fine mist of water. Allow it to dry, and you will have a surface that is hard and ready to display. You can even paint it and build a model Moon colony on the surface.


	The Day Care Experiment \| home Experiments for Kids \| Have fun/meet new friends Experiments for Kids Sticky Situation 1.Pour a small puddle of water onto the smooth countertop. 2. Set the flat tray into the puddle, making sure there is no air trapped underneath. 3.Pull straight up on the tray. What happens? You will find it difficult to lift the tray straight off the counter because of the adhesive force of the water. Make a Rainbow You will need tall, clear glass of water and a flashlight Hold the- flashlight beside the glass so that the beam is shining through the middle of the water. Hold a piece of white paper beside the flashlight, and look for a rainbow on the paper. You may have to adjust the position of the paper to find it. The glass of water acts like one large drop of water, bending the light and spreading out the colours. The rainbow that appears in front of the glass, spreading back toward the light source, is light that has been refracted and reflected twice, just like a rainbow. Another rainbow can be found behind the glass, made up of light that was refracted, but not reflected - light that passed right through the glass of water. It is this kind of refraction that can cause a rainbow around a light source, such as a ring around the Moon. Create your own Crater Gather together a large mixing bowl dry plaster of paris (if unavailable, use flour) several balls or small objects of different weights spray bottle filled with water Cover the bottom of the bowl with the dry plaster of paris to a depth of at least 5 cm (2 in). Hold one of the balls about 1 m (3 ft) over the bowl and let it drop into the powder. Examine the structure of the crater made by the impact of the ball. Experiment by dropping the ball from different heights, and try balls of different sizes. What affects the size of the crater? Make several impacts of different sizes until they begin overlapping and old craters begin to get destroyed by new ones. When the surface of the powder begins to look like the picture of the Moon's surface, you have created a "lunar landscape." When you are satisfied with your lunar landscape, gently spray the surface with a fine mist of water. Allow it to dry, and you will have a surface that is hard and ready to display. You can even paint it and build a model Moon colony on the surface.