Air Takes Up Space
Students begin their investigation of air by learning about solids, liquids, and gases. They learn that gases are made up of tiny particles that ﬂoat around. Then they do a number of short experiments to show that air takes up space. When they push on an air-ﬁlled balloon, they see that the balloon pushes back. When they try to force a bag into an air-ﬁlled jar, they see that the bag will not go in because the space is already occupied. A paper towel in an inverted cup remains dry even as the cup is lowered into a water bath because air in the cup keeps the water away from the towel. Finally, students blow bubbles under water and observe that air rises in water because air is less dense than water.
Learn by Reading
For additional content-area reading, check out the Houghton Mifflin Science eBook: Grade 1, Unit E, page 41.