CBSE Class 8 Science Pollution Of Air And Water Worksheet Set A

CBSE Class 8 Science Worksheet - Pollution of Air and Water Part B - Practice worksheets for CBSE students. Prepared by teachers of the best CBSE schools in India.


GRH Marg






Assignment No. 10

Q.1 Fill in the blanks:-

(i) By volume about _______ of air is nitrogen and about _________ is oxygen.

(ii) Incomplete burning of fuels produces ________ which is a _______ gas.

(iii) Carbon monoxide _________ the oxygen carrying capacity of the blood.

(iv) Petroleum refineries are a major source of gaseous pollutants like ______ and ______.

(v) _______ used in refrigerators damages the ozone layer of the atmosphere.

(vi) Ozone layer protects us from the harmful ________ rays of the sun.

(vii) _______ of the world’s population is without safe drinking water.

(viii) We can save water by remembering the 3R’s ____, ____ and ________.

(ix) Acid rain is formed by the oxidation followed by dissolution of ________ and gases in rain water.

Q.2 MULTIPLE CHOISE QUESTIONS: (Choose the most appropriate answer.?

(A) Which of these causes water pollution?

  (a) Sewage (b) Industrial waste (c) Fertilizers and pesticides (d) All of these

(B) Which of these processes can not remove germs from water?

  (a) boiling (b) Filtration through Porous Pot (c) Reverse Osmosis (d) exposure to UV light

(C) Which of the following is not a pollutant unless present in excess?

  (a) Sulpher Dioxide (b) Carbon dioxide (c) Nitrogen dioxide (d) carbon monoxide

(D) Which of these can cause acid rain?

  (a) Sulpher Dioxide (b) Carbon dioxide (c) Nitrogen (d) carbon monoxide

Q.3 Define air pollution. What are air pollutants?

Q.4 What are the various sources of air pollutants?

Q.5 What is smog? Why is it harmful?

Q.6 What is acid rain?

Q.7 How is the Taj Mahal affected by air pollution?

Q.8 What is meant by ‘Marble Cancer’?

Q.9 Write the full forms (i) CFC (ii) CNG (iii) LPG (iv) WWF

Q.10 What is greenhouse effect? Name four greenhouse gases.

Q.11 Write a note on global warming mentioning its effects too.

Students must free download and practice these worksheets to gain more marks in exams. CBSE Class 8 Science Worksheet - Pollution of Air and Water Part B



Click to View or Download pdf file
Click for more Science Study Material

Latest NCERT & CBSE News

Read the latest news and announcements from NCERT and CBSE below. Important updates relating to your studies which will help you to keep yourself updated with latest happenings in school level education. Keep yourself updated with all latest news and also read articles from teachers which will help you to improve your studies, increase motivation level and promote faster learning

Class 10 Datesheet announced

CBSE has announced the date sheet for the remaining class 10 Board Exams, see dates below

Class 10 Board Exams to be held

The CBSE board has announced that there is no change in the decision of conducting the CBSE board exams for the 29 subjects, which were canceled due to coronavirus crisis. So when the lockdown gets relaxed completely, the board will conduct the exams for the students,...

Live session by CBSE Experts for holistic wellbeing

CBSE and Fit India Mission have collaborated to provide live sessions by experts covering a range of topics for holistic well-being of school going children, which will include simple actionable tips around Basic Exercises, Nutrition, Yoga & Meditation, boosting...

Class 12 Board Exams Datesheet Announced

CBSE has announced the datesheet of the remaining class 12 board exams, see below:  

Applied Mathematics Introduced by CBSE as Elective for Class 11 and Class 12

Mathematics Syllabus Revised by CBSE at the Senior Secondary Level! The Central Board of Secondary Education (CBSE) to offer 'Applied Mathematics' as an Elective for XI and XII standard students. The elective subject, Applied Mathematics, is focused at evolving an...

Procedure for correction in Name and Date of Birth

Procedure for correction in Name and Date of Birth in CBSE records Name Change: Applications regarding changes in name or surname of candidates will be considered provided the changes have been admitted by the Court of law and notified in the Government Gazette before...

Studies Today