Olympiad Test Level 2: Earth and Its Environment- 1 - Class 3 MCQ

The ozone layer is mainly made up of oxygen gas, Ozone protects the life on Earth from the sun's ultraviolet radiations.

Because of excess pressure below, even after the hot temperature, the metals are present in solid state in inner core of the Earth.

This is why, the sun appears to rise in the east and set in the west.

The topmost layer of the Earth’s surface is the coolest one.

The circular flow (winds moving in a circle) of fastmoving winds are called a cyclone.

The range of temperature of outer core of the Earth is 4400°C - 5000°C. The outer core is about 2,200 kilometers (1,367 miles) thick.

Because of excess pressure below, even after the hot temperature, the metals are present in solid state in the inner core of the earth.

Sapphire and turquoise are blue-coloured while pearl is white in colour.

The seasons are opposites in the two hemispheres of the Earth divided by the equator.

The tectonic plated collide with each other which causes earthquakes and volcanoes.