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Which one of the following is a part of the biosphere

• Rocks

• clouds

• plants

• water

Magnetism is a force that attracts objects made of all of the following except.

• Iron

• copper

• nickel

• cobalt

A group of plants and animals which live together in a large area is called

• hydrosphere

• geosphere

• biosphere

• biome

There is a/ an ....................between Nile river and Mediterranean sea

• lake

• wetland

• estuary

• ocean

Preventing the developing of Ras Mohamed Protectorate is considered as an example of

• preservation

• pollution

• sustainability

• consumption

Gravitational force of Earth is affected by ............

• mass and time

• mass only

• mass and distance

• distance only

Day and night occurs due to the rotation of Earth around

• the Sun

• its axis

• the moon

• the solar system

The orbiting of an object around another object is called

• revolution

• rotation

• speed

• spinning

The half of the Earth that faces the Sun has day

• true

• false

Wastewater engineers decide where to build water treatment plants

• True

• false