C02 is lighter than air because leaves absorb it and they are on top of trees. To remove air from a flask, fill the flask with water, tip the water out, and put the cork in, quick. The three cavities of the body are the head cavity, the tooth cavity and the abominable cavity. The spinal column is a long bunch of bones. The head sits on the top and you sit on the bottom.
Most books say the sun is a star.
But it still knows how to change back into the sun in the daytime. Cadavers are dead bodies that have donated themselves to science. This procedure is called gross anatomy. The cause of dew is through the earth revolving on it's own axis and perspiring freely. Hot lather comes from volcanoes, and when it cools, it turns into rocks.