Last Updated on March 31, 2024 by XAM CONTENT
Hello students, we are providing case study questions for class 8 science. Case study questions are the new question format that is introduced in CBSE board. The resources for case study questions are very less. So, to help students we have created chapterwise case study questions for class 8 science. In this article, you will find case study questions for cbse class 8 science chapter 2 Microorganisms: Friend and Foe.
| Chapter | Microorganisms: Friend and Foe |
| Type of Questions | Case Study Questions |
| Nature of Questions | Competency Based Questions |
| Board | CBSE |
| Class | 8 |
| Subject | Science |
| Useful for | Class 8 Studying Students |
| Answers provided | Yes |
| Difficulty level | Mentioned |
| Important Link | Class 8 Science Chapterwise Case Study |
Case Study Questions on Microorganisms: Friend and Foe
Questions
Q.1. Yash lived in Delhi and he loves to play football. But as of now his half yearly exams were going on so his mother didn’t allow him to go out and play. She promised Yash that as soon as his exams are over, he can go and play.
Post exams he went out to play football with his friends in the park. Suddenly a mosquito bit him under his left knee. He came home and everything was normal that time. The next day his health started getting affected. His Parents rushed him to the doctor. The doctor prescribed some medicines and some medical tests. The next day parents went to the doctor with yash’s medical report. In that report the platelet counts were very low. The doctor diagnosed him with Dengue fever. Yash was hospitalised for some time and followed a strict diet to recover as early as possible. And eventually some days passed and he recovered.
Q. 1. Organisms which cannot be seen by naked eye.
(a) Plants
(b) Animals
(c) Microorganisms
(d) None of these
Difficulty Level: Easy
Ans. Option (c) is correct.
Explanation: Microorganisms are the living organisms that are very minute to be seen by naked eye that can be seen only through microscope. Microorganisms include bacteria, algae, fungi and protozoa.
Also read: Microorganisms: Friend and Foe Assertion Reason Questions
Q. 2. The causative organisms of dengue is
(Easy)
(a) Anopheles mosquito
(b) Aedes aegypti mosquito
(c) Dengue virus
(d) None of these
Difficulty Level: Easy
Ans. Option (b) is correct.
Explanation: Dengue is a mosquito borne viral disease caused by the dengue virus and transmitted by female mosquito Aedes aegypti.
Q.3. How does dengue virus spread?
Difficulty Level: Medium
Ans. Dengue is a viral infection transmitted to humans through the bite of mosquitoes. It is caused by the bite of female mosquito Aedes aegypti. The mosquito becomes infected when it takes the blood of a person infected with the virus. After about one week, the mosquito can then transmit the virus while biting a healthy person. These mosquitoes generally bite during day time and are found everywhere. Headache, high fever, vomiting are some symptoms of dengue.
Q.4. Write any three preventive measures for dengue fever.
Difficulty Level: Medium
Ans. (i) Use mosquito repellents and wear long sleeved clothes and full pants before going outside the house
(ii) Do not let water stagnate anywhere, reduce the mosquito habitat.
(iii) Sleeping under the mosquito net protects from being bitten by mosquitoes.
Also check
- Light Class 8 Case Study Questions Science Chapter 13
- Some Natural Phenomena Class 8 Case Study Questions Science Chapter 12
- Chemical Effects of Electric Current Class 8 Case Study Questions Science Chapter 11
- Sound Class 8 Case Study Questions Science Chapter 10
- Friction Class 8 Case Study Questions Science Chapter 9
- Force and Pressure Class 8 Case Study Questions Science Chapter 8
- Reaching the Age of Adolescence Class 8 Case Study Questions Science Chapter 7
- Reproduction in Animals Class 8 Case Study Questions Science Chapter 6
- Conservation of Plants and Animals Class 8 Case Study Questions Science Chapter 5
- Combustion and Flame Class 8 Case Study Questions Science Chapter 4
- Coal and Petroleum Class 8 Case Study Questions Science Chapter 3
- Microorganisms: Friend and Foe Class 8 Case Study Questions Science Chapter 2
- Crop Production and Management Class 8 Case Study Questions Science Chapter 1
Topics from which case study questions may be asked
- Knowing types of micro-organisms.
- Learning about various friendly micro-organisms.
- Knowing how microorganisms are helpful.
- Discussing medicinal uses of micro-organisms.
- Discussing harmful micro-organisms and the diseases they cause.
- Knowing various methods of preserving food.
- Learning the nitrogen cycle in nature.
We find a large number of living organisms around us. Some of them are so tiny that they cannot be seen with the naked eye. They are called micro-organisms. We need a magnifying glass or a microscope to observe them. This chapter deals with study on how these microorganisms are useful as well as harmful to us. So based on this, the above topic list is provided.
