Learn Class 3 General Knowledge - Earth and Its Environment

Earth is the only planet where life exists in the solar system because of a unique collection of resources that enable human survival. It is a significant element of the environment.

Our discussion will focus on Earth along with its components.

Earth

Located about 3 billion miles from the Sun, the Earth is made up of three layers - the crust, the mantle, and the core. It is at the centre of the solar system.

Nitrogen, Oxygen, and Carbon dioxide are just some of the gases present in the air.

Components of Earth

The Earth is one combined system. However, it can be classified into four main components:

  • Air
  • Land
  • Water
  • Living things

All these things on the Earth create an environment.

Environment

Things that are in our physical surroundings are called the environment. All the organisms, including plants, human beings, animals. It includes everything, i.e., vegetation, water, soil, microorganisms, soils, atmosphere, etc.

Everything in our surroundings, living or nonliving, creates the environment.

Components

The things which exist in the environment are categorised into two components:

  • Abiotic Components
  • Biotic Components

Non-living things exist in the environment, called Abiotic Components. It includes soil, air, rocks, water, etc.

Earth and Its Environment Sample Questions for Class 3

Question 1

Which is the largest volcano of the world?
A. Tamu Massif
B. Mauna Loa
C. Yellowstone
D. None of these

Question 2

Which is the longest river in the world?
A. The Nile
B. The Ganges
C. The Yamuna
D. The Mississippi

Question 3

When is World Environment day celebrated?
A. 1st December
B. 5th June
C. 16th July
D. 22nd June

Question 4

Select the INCORRECT match.
A. Martyr’s Day - 30th January
B. World Environment Day - 5th June
C. National Science Day - 28th March
D. Independence Day - 15th August

Question 5

Which is the deepest ocean in the world?
A. Indian Ocean
B. Pacific Ocean
C. Atlantic Ocean
D. Arctic Ocean