CBSE Class 8 Science Combustion and Flame Assignment Set C

CBSE Class 8 Science - Combustion and Flame (3)

Chapter wise assignments are being given by teachers to students to make them understand the chapter concepts. Its extremely critical for all CBSE students to practice all assignments which will help them in gaining better marks in examinations. All assignments available for free download on the website are developed by the best teachers having many years of teaching experience in CBSE schools all over the country. Students, teachers and parents are advised to download the CBSE study material.

 

1. Define Fuel. Give examples of solid, liquid and gaseous fuels.

2. Differentiate between combustible and non-combustible substances with two examples of

each kind.

3. Why does a candle stop burning when covered with a glass tumbler ?

4. How is spontaneous combustion different from explosion?

5. Special care should be taken to store kerosene oil. Give reason.

6. Why is L.P.G labeled as inflammable substance?

7. How does water help to extinguish fire?

8. Underline the substances which will produce flame on burning and why?

Charcoal ,molten wax, paper, coal, mustard oil

9. Draw a well labeled diagram of the flame of a candle and answer the following

Questions:

(a) Which zone is luminous and why ?

(b) Why is the innermost zone grey in colour and the coldest zone ?

(c) Which zone is called the zone of complete combustion and why?

10. Calorific value of wood is approx.17000-22000kj/kg. What does it mean?

11. Why is it dangerous to burn coal in a closed room?

12. Write any 4 characteristics of good fuel.

13. Name the gases which lead to formation of acid rain.

14. In an experiment 10 Kg of a fuel produced 200,000 KJ 0f heat . Calculate the calorific

value of the fuel.

15. How does CO2 help in fire fighting?

*****

Please click the below link to access CBSE Class 8 Science - Combustion and Flame (3)

Tags: 

 


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

Keep your kids engaged during Lockdown

Kids are the Future of our Country! Outlines have changed and so should the formats of existence! It is the best time to teach our kids the pleasure of Self-Discipline, Self-Realization and Self-Control. To keep the future generation safe in such unpredictable...

Online Teacher Training Course on Competency based Education in DIKSHA

Competency is a set of skills, abilities, knowledge that helps an individual perform a given task in real life. Every learning should go into the imbibing of these skills to lead a productive and joyful life. The NATIONAL EDUCATION POLICY-2020 calls for shift towards...

TERI Green Olympiad 2020

Green Olympiad is a value driven project conducted by TERI (The Energy and Resources Institute) for school students annually since 1999. This Olympiad assesses the environment quotient of students and also enhances their understanding on issues related to sustainable...

Conduct of the practical work during the lockdown

CBSE has advised schools to follow the Alternative Calendar developed by NCERT to continue education during the lockdown through alternative modes to achieve learning outcomes. Schools have reportedly started using these calendars and other prescribed pedagogical...

Gandhiji Quiz by CBSE

CBSE has launched a Quiz on Mahatma Gandhi. The quiz portal can be accessed on Discover Gandhi portal at: https://discovergandhi.in/ DIKSHA platform (https://diksha.gov.in) and the Discover Gandhi mobile App which can be easily downloaded from Google Play Store on...

Mathematical Literacy Free Practice Book for Students

With a larger goal to promote 21st century skills such as critical thinking and problem solving, the Central Board of Secondary Education has shared a Mathematical Literacy: Practice Book for Students. This Work Book is designed to allow learners of classes 7th to 10th...

×
Studies Today