For example, they might do activities with mirrors to explain how light travels. They ask questions and make up experiments to show how friction can slow down motion, or how heat flows through different kinds of materials. As students learn more mathematics, they can explain events in a mathematical way. For example, stopping a car can be explained in terms of its speed, its weight, its direction, the forces exerted on it, and its resulting slow-down. They use maps to identify major features of the earth's crust and its oceans.
Older students explore changes that have occurred in and on the earth over time.
The Universe Astronomy and space are fascinating to people of all ages. Children study the earth, moon, eclipses, planets, and stars. They construct models of the solar system and compare the earth to other planets. Older students understand scientific theories about the origin of the universe, and they are able to discuss the potential benefits and risks involved with the exploration of outer space. Young children should develop an awareness of the need to protect and preserve natural resources.