Blow up a balloon without using your mouth or your hands. The balloon should inflate inside the bottle.
Why it happened:
As the air in the bottle cooled, it contracted and took up less space in the bottle. Air from outside the bottle rushed in to fill the space and inflated the balloon.
What happened:
In the experiment, the clay represents the Moon, the flashlight the Sun, and the orange is the Earth. When the moon blocks the Sun’s light from the Earth, it casts a shadow on Earth. The darker, middle part of the shadow is called the umbra. The lighter shadow on the outer rim is called the penumbra. Ready for some backyard activity—volcanic activity, that is? Here’s what you need: Watch red foam spray out of the top and down the mountain like lava from a volcano.
Why it happened
The baking soda reacted with the vinegar to produce carbon dioxide gas. The gas built up enough pressure to push the foaming liquid out of the top of the bottle.
What happens:
The liquids remain as separate layers. (If they got mixed, try again, being careful not to shake the jar or disturb the layers while pouring liquid into the jar.) They stayed layered because you poured the liquids into the jar from the highest density to the lowest density. The oil is least dense, so it floats on top. See also : Earth Science Projects for Beginners, Chemistry Science Projects for Beginners, Physical Science Projects for Beginners, Botany Science Projects for Beginners, and Biology Science Projects for Beginners See also: What Makes a Good Science Project? More Science Project Ideas Questions from Science Judges The Parts of a Science Project
