Grade 7 Final Revision Part2 S2 NEW

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

• the Milky Way Galaxy

• A planetary system

• Natural satellite

• Vegetation patterns

Earth has only one moon which is its natural satellite

• True

• False

An object in space that revolves around another bigger object

• Satellite

• Galaxy

• Space craft

• the Sun

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

• The solar system

• Natural satellite

• the Milky Way Galaxy

• the Earth

Earth moves in two motions: Orbiting and spinning

• True

• False

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

• True

• False

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

• True

• False

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

• the Outer Core and the Inner Core

• Upper mantle, and the Lower mantle

• Continental Crust and Oceanic Crust

• the Crust, the Mantle

Oceans are divided into seven layers

• True

• False

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

• Epipelagic Zone

• Mesopelagic Zone

• Bathypelagic Zone

• Abyssopelagic Zone