Our Environment Class 3 Worksheet Science

Q1: Multiple Choice Questions (MCQs)

(i) What is the definition of an ecosystem?
(a) A community of interdependent living organisms and their environment
(b) The total amount of water on Earth
(c) The hard outer layer of the Earth
(d) The thin layer of air around the Earth

(ii) Which component of the environment provides resources like minerals and landforms?
(a) Atmosphere
(b) Hydrosphere
(c) Lithosphere
(d) Biosphere

(iii) What is the largest component of the Earth?
(a) Lithosphere
(b) Hydrosphere
(c) Atmosphere
(d) Biosphere

(iv) Which of the following is a human-made component of the environment?
(a) Mountains
(b) Rivers
(c) Roads
(d) Oceans

Q2: Fill in the Blanks

(i) The biological environment is also known as the ______.
(ii) The Earth's outermost layer, made up of rock, is called ______.
(iii) The total amount of water on Earth is known as the ______.
(iv) An ecosystem is a system formed by a community of ______ living organisms found in a place, and their interaction with the environment.
(v) The atmosphere helps control the ______ on Earth.

Q3: Match the Column (In a Table)

Q4: True or False

(i) The hydrosphere provides living beings with water, which is essential for life.
(ii) The physical environment consists of the lithosphere, hydrosphere, and biosphere.
(iii) Humans primarily adapt themselves to the environment, rather than changing it.
(iv) An ecosystem is a static, unchanging system.
(v) The socio-cultural environment includes factors like family, religion, and education.