Worksheet Solutions: Our Environment - 2

Q1: Fill in the blanks.

(i) Pollution is the presence of ________ substances in the environment.
Ans: harmful
Pollution refers to the introduction of harmful substances into the environment, affecting air, water, and soil.

(ii) Acid rain damages ________ and buildings.
Ans: plants
Acid rain is harmful to plants and can cause damage to buildings and other structures.

(iii) Non-biodegradable waste includes materials like ________.
Ans: plastic bags, metal cans, glass bottles, broken glass pieces
Non-biodegradable waste consists of materials that do not rot, such as plastic bags, metal cans, glass bottles, and broken glass pieces.

(iv) The gas present high up in the atmosphere that absorbs ultraviolet rays is called ________.
Ans: ozone
Ozone is a gas present high in the atmosphere that protects the Earth from harmful ultraviolet rays.

(v) Swachh Bharat Abhiyan was launched by the Government of India to promote ________.
Ans: cleanliness and waste management
Swachh Bharat Abhiyan is a national program to improve cleanliness and proper waste management across India.

Q2: Match the column.

Ans:

Q3: True or False.

(i) Acid rain can cause harm to human skin.
Ans: False
Acid rain is not strong enough to harm human skin, but it can damage plants, buildings, and affect the soil.

(ii) The Swachh Bharat Abhiyan is a cleanliness drive initiated by the Government of India.
Ans: True
The Swachh Bharat Abhiyan is a national cleanliness drive launched by the Government of India.

(iii) Biodegradable waste includes plastic bags and metal cans.
Ans: False
Biodegradable waste includes materials that rot and mix with the soil, such as plant waste, food waste, and paper.

(iv) Global warming is caused by an increase in carbon dioxide in the atmosphere.
Ans: True
Global warming occurs due to an increase in carbon dioxide and other greenhouse gases, which trap heat in the Earth's atmosphere.

(v) Recycling is a way to reduce non-biodegradable waste.
Ans: True
Recycling involves using waste materials to make useful items, which helps reduce non-biodegradable waste.

Q4: Choose the odd one out.

(i) (a) Dust particles
(b) Fumes from vehicles
(c) Smoke from factories
(d) Greenhouse gases
(e) Water pollution
Ans: (e)
The options a, b, c, and d are all related to air pollution, while option e is related to water pollution.

(ii) (a) Air pollution
(b) Water pollution
(c) Land pollution
(d) Ocean pollution
(e) Noise pollution
Ans: (d)
The options a, b, c, and e are all types of pollution, while option d is specifically referring to pollution in oceans.

Q5: Short Answers Questions.

(i) What are pollutants?
Ans: Pollutants are harmful substances introduced into the environment that can cause damage to air, water, and soil.

(ii) How does air pollution occur during Diwali?
Ans: Air pollution during Diwali occurs due to the burning of crackers, which release harmful fumes and smoke into the air.

(iii) How does acid rain affect the environment?
Ans: Acid rain damages plants, buildings, and affects the soil, leading to harmful consequences for the environment.

(iv) How can we reduce non-biodegradable waste?
Ans: We can reduce non-biodegradable waste by following the 4R rule - Refuse, Reduce, Reuse, and Recycle.

(v) What is the purpose of the Swachh Bharat Abhiyan?
Ans: The Swachh Bharat Abhiyan aims to promote cleanliness and proper waste management across India.