NCERT Solutions For Class 8 Science Chapter 2 Microorganisms
NCERT Solutions for Class 8 Science Chapter 2, provided on this page, is prepared by subject matter experts. Students can use these solutions during revision to understand the concepts of the chapter better.
Jasdeep Bhatia7 Jun, 2024
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NCERT Solutions for Class 8 Science Chapter 2: gives a thorough knowledge of microorganisms and their various functions and activities. To help students improve their understanding of the fundamentals, our team of subject experts has prepared solutions for the different questions in this chapter, considering the CBSE board’s requirements. Students can consult the NCERT solutions for Class 8 Science Chapter 2 for effective exam preparation and positive outcomes.
NCERT Solutions for Class 8 Science Chapter 2 Overview
NCERT Class 8 Science Chapter 2 thoroughly examines the various functions that microorganisms perform in ecosystems and our daily lives. The chapter highlights the useful functions of microbes, including their importance to environmental processes. The detrimental effects of some microbes, referred to as pathogens, which cause illnesses in people, animals, and plants, are also covered in this chapter. The NCERT solutions Class 8 Science Chapter 2 questions in this article will help students understand the important topics and answer the questions accurately in exams.List of the Topics Covered in NCERT Class 8 Science Chapter 2
The different topics covered in NCERT Class 8 Science Chapter 2 are discussed below:- Microorganisms
- Habitats of Microorganisms
- Microorganisms and us
- Harmful microorganisms
- Food preservation
- Nitrogen fixation
- Nitrogen cycle
NCERT Solutions for Class 8 Science Chapter 2 PDF
For the convenience of the students, we have provided the NCERT Solutions For Class 8 Science Chapter 2 in PDF format below. Students can download it using the given link and study thoroughly to understand the topics covered in the chapter.NCERT Solutions for Class 8 Science Chapter 2 Exercise Questions
Fill in the blanks: (a) Microorganisms can be seen with the help of a ____________. (b) Blue-green algae fix __________ directly from the air and enhance the fertility of the soil. (c) Alcohol is produced with the help of __________. (d) Cholera is caused by __________. Solutions:- a) Microscope
- b) Nitrogen
- c) Yeast
- d) Bacteria ( Vibrio cholera)
- Tick the correct answer.
- a) (ii) alcohol
- b) (ii) Streptomycin
- c) (i) female Anopheles mosquito
- d) (ii) housefly
- e) (iii) growth of yeast cells
- f) (iii) fermentation
- Match the organisms in Column A with their actions in Column B.
| A | B |
| Bacteria | Fixing Nitrogen |
| Rhizobium | Fixing of curd |
| Lactobacillus | Baking of bread |
| Yeast | Causing Malaria |
| Protozoa | Causing Cholera |
| A Virus | Causing AIDS |
| Producing Antibodies |
| A | B |
| Bacteria | Causing Cholera |
| Rhizobium | Fixing Nitrogen |
| Lactobacillus | Setting of Curd |
| Yeast | Baking of Bread |
| Protozoa | Causing Malaria |
| A Virus | Causing AIDS |
| Producing Antibodies |
- Can microorganisms be seen with the naked eye? If not, how can they be seen?
- What are the major groups of microorganisms?
- Bacteria
- Virus
- Fungi
- Algae
- Protozoa
- Name the microorganisms that can fix atmospheric nitrogen in the soil.
- Write 10 lines on the usefulness of microorganisms in our lives.
- Lactobacillus-type bacteria use milk to make curd.
- Cheese is also made with the help of bacteria.
- The bacteria Acetobacter aceti produces acetic acid from alcohol.
- Commercial manufacturing of wine, beer, and baked goods all employs yeast.
- Bacteria and yeast are used for the fermentation of rice idlis and dosa batter.
- Certain bacteria are useful in the production of antibiotics.
- Microorganisms break down waste materials into manure and serve as cleaning agents.
- Vaccines are made with either dead or weakened microorganisms.
- Certain microorganisms improve soil fertility by removing nitrogen from the atmosphere.
- Algae, yeast, fungi, or bacteria can be utilized as components to make foods high in protein suitable for human or animal consumption.
- Write a short paragraph on the harmful effects of microorganisms.
- What are antibiotics? What precautions must be taken while taking antibiotics?
- Effective Exam Preparation: The solutions for NCERT Class 8 Science Chapter 2 are prepared by experts, considering the latest CBSE syllabus requirements. It will help students thoroughly understand the concept, making exam preparations more effective.
- Easy to Understand and Recall: Academicians with subject-matter expertise wrote the NCERT Class 8 Science solutions very fluently and straightforwardly, making it simple for students to understand and remember the answers.
- Quick Revision: The NCERT solution for Class 8 Science chapter 2 exercise helps students quickly go through the important points of the various topics of the chapter during the revision process and also helps them answer other questions during practice.
NCERT Solutions For Class 8 Science Chapter 2 FAQs
Why are pickles kept in oil or vinegar?
Ans. The presence of oil or vinegar prevents the growth of microorganisms that can spoil the material.
What is pasteurized milk?
Ans. The milk is heated to 70 degrees Celsius, then chilled suddenly and stored. This process is known as pasteurization, which prevents the growth of microbes in milk.
How do pathogens transmit from one person to another?
Ans. The harmful microorganisms, or pathogens, can be transmitted by direct contact with the infected person, by transmission through air, water, or food, or through insects and other animals.
How can a vaccine help fight infections?
. Vaccines are prepared from dead or weakened microbes that are inserted into the human body to stimulate the immune system to produce antibodies, which can defend the body from the effects of microbes. These antibodies remain in the body and help fight further infections caused by microbes.
Where do microorganisms live?
Ans. Microorganisms can live in a diverse range of environments, both hot and cold. They are also found inside animal bodies, including those of humans.
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