An earthquake is one of the worst natural disasters on our earth. We think that the ground we stand on is very stable, but it isn’t. It moves quite a lot.
Astronomy is about studying space, the universe, stars and the planets in our solar system.
Electricity is the flow of electrical power or charge. Electricity is both a basic part of nature and one of the most widely used forms of energy.
Our solar system is made up the sun, eight planets, more than 150 moons, as well as comets, asteroids, dwarf planets and other space rocks.