> At sunrise your shadow on the ground is very long---longer than you > are! At sunset your shadow is long again, but it points the other way. > And in the middle of the day, when the sun is high in...
What makes a shadow?
> In the sunshine, your shadow travels with you everywhere you go. > Sometimes it bends in funny places. Sometimes it takes a strange > shape. But it's always there. On a cloudy day, or in a dark...
Light gets around
Materials - ball (small) - block (small) - cardboard - clay (modeling) - flashlight - jar (round) - masking tape - milk - mirror (small) - paper (white) - ruler - scissors - water The...
Looking at moonlight
Boys and girls, come out to play, The moon is shining bright as day. Mother Goose Under a full moon there is plenty of light for a game of tag, for hide-and-seek, or for an evening walk. It's...
What is light?
A burning candle has a soft, glowing flame that gives off light. But when you turn on a light bulb, there is no flame. What makes the light bulb give off light? If you hold your hand above a light...
Seeing the Light
Seeing the Light Seeing the Light
Heat-savers
What kinds of materials can be used to slow down heat? You can use your refrigerator to make an easy test. Make sure there is enough room in the bottom of the freezing compartment in your...
How does a picnic cooler work?
What kinds of food can you take on a picnic? Any kinds you like---hot baked beans, steaming cocoa, chilled potato salad, or ice- cold lemonade. You can put the food in a picnic cooler, or in special...
The Fire Bringer
A Paiute Indian legend Adapted from a story by Mary Austin The use of fire is probably the most important discovery people ever made. It provided energy for light, for warmth, and for cooking....
Taking out heat
Just a few minutes after you put warm food in a refrigerator, the food feels cooler. But the air inside the refrigerator doesn't feel warmer. What happens to the heat? The heat doesn't disappear....