Air Pushes on Things
Students observe how air pressure affects liquid in a barometer and how a barometer can be used to measure changes in air pressure. Students then observe how air pressure can hold water in a straw and in an inverted cup, and how differences in air pressure can push objects from one place to another.
Learn by Reading
For additional content-area reading, check out the Houghton Mifflin Science eBook: Grade 1, Unit C, pages 34–35.