Worksheet Solutions: Pollution and Conservation of the Environment | Be an Explorer 5: Book Solutions, Notes & Worksheets - Class 5 PDF Download

Q1: Multiple Choice Questions (MCQs).

(i) What is pollution?
(a) The environment itself
(b) Harmful substances added to the environment
(c) Non-living things in the environment
(d)  The process of recycling
Ans: (b)
Pollution is defined as the addition of harmful substances into the environment, altering it.

(ii) Which of the following is NOT a type of pollution?
(a) Water pollution
(b) Light pollution
(c) Land pollution
(d) Noise pollution
Ans: (b)
Light pollution is not as one of the four main types of pollution.

(iii) How does water pollution occur in ponds and lakes?
(a) By oil spills
(b) Through air pollution
(c) When there is a storm or windy conditions
(d) By bathing and washing clothes
Ans: (d)
Water pollution can occur when there is a storm or windy conditions, causing soil and dust to enter the water.

(iv) What are the major ill effects of water pollution?
(a) Increased oxygen levels
(b) Promotion of marine life
(c) Diseases like typhoid and dysentery
(d) Improved water quality for cooking and drinking
Ans: (c)
The major ill effects of water pollution include diseases like typhoid and dysentery.

(v) What is the primary cause of air pollution?
(a) Forest fires
(b) Vehicle horns
(c) Burning of crackers
(d) Mining activities
Ans: (a)
Air pollution is primarily caused by forest fires, among other factors.

Q2: Fill in the Blanks.

(i) Land pollution is caused by the excessive use of _______.
Ans: Chemicals, pesticides, and fertilizers
Land pollution is caused by the excessive use of these substances.

(ii) Noise pollution can have an adverse effect on _______.
Ans: Blood pressure
Noise pollution can have adverse effects on blood pressure.

(iii) The method of waste disposal where waste materials are dumped in deep ditches is called _______.
Ans: Landfill
Landfill is the method of waste disposal where waste materials are dumped in deep ditches and covered with soil.

(iv) Biodegradable waste is decomposed by _______ found in the soil.
Ans: Microorganisms (bacteria, earthworms, etc.)
Biodegradable waste is decomposed by microorganisms found in the soil.

(v) The three Rs for environmental conservation are Reduce, Recycle, and _______.
Ans: Reuse
The three Rs for environmental conservation are Reduce, Recycle, and Reuse.

Q3: Match the Column.

Ans:

Q4: True or False.

(i) Noise pollution is caused by low-decibel sounds.
Ans: False
Noise pollution is caused by loud and irritating sounds, not low-decibel sounds.

(ii) Dumping of waste materials in open areas is a safe waste disposal method.
Ans: False
Dumping in open areas is harmful for humans and the environment.

(iii) Recycling is the process of acquiring only what we can use to the fullest.
Ans: False
Reducing is the process of acquiring only what we can use to the fullest; recycling is processing waste material.

(iv) Non-biodegradable wastes dissolve easily in the soil.
Ans: False
Non-biodegradable wastes do not easily dissolve in the soil.

(v) Global warming is a result of water pollution.
Ans: False
Global warming is a result of air pollution, not water pollution.