Grade 7 Final Revision Part2 S2 NEW

This system is made of different celestial objects and planets that revolve around the Sun

Earth has only one moon which is its natural satellite

An object in space that revolves around another bigger object

A system of billions of stars, gases, and dust that stretches across the sky and is held together by gravity.

Earth moves in two motions: Orbiting and spinning

the spinning motion of the Earth creates the four seasons and orbiting motion creates night and day

The Earth is made up of three main layers: the crust, the mantle, and the core

Earth’s crust is the outer thin layer that covers the surface of Earth, it is divided into two parts:

Oceans are divided into seven layers

(the Sunlight Zone):  It is warmer than other layers since sunlight passes through it