Welcome To My School Study
Practice Class 8 Science MCQ Questions with Answers based on the latest NCERT syllabus. Learn about Kharif crops, fertilizers, tilling, microorganisms, and threshing with detailed explanations, exam tips, and NCERT-based solutions for CBSE and State Board students
Do You Know
Chapter Information
Subject: Science
Class: 8
Topics Covered:
- Crop Production and Management
- Microorganisms: Friend and Foe
Question Type: Multiple Choice Questions (MCQs)
Difficulty Level: Easy to Moderate
Based On: Latest NCERT Syllabus
Introduction
Agriculture and microorganisms play an important role in our daily lives. Farmers use different agricultural practices such as soil preparation, sowing, fertilization, and harvesting to grow healthy crops, while microorganisms are useful in food production, medicine, and environmental processes. This MCQ practice set is designed according to the latest NCERT syllabus to strengthen conceptual understanding and improve exam performance.
What You Will Learn
✔ Kharif and Rabi crops
✔ Fertilizers and their uses
✔ Soil preparation (Tilling)
✔ Microorganisms and their characteristics
✔ Harvesting and threshing
✔ Important NCERT concepts
Why This Topic Is Important?
Understanding crop production methods and microorganisms helps students appreciate the importance of agriculture, food security, and scientific farming techniques. These concepts are frequently tested in school examinations, Olympiads, and scholarship tests.
Exam Relevance
These questions are useful for:
✔ CBSE Exams
✔ State Board Exams
✔ School Tests
✔ Unit Tests
✔ Half-Yearly Exams
✔ Annual Exams
✔ Scholarship Examinations
Q1. Which of the following is a Kharif crop?
A) Pea
B) Gram
C) Wheat
D) Maize
Answer
Maize
Concept Behind This Question
Kharif crops are cultivated during the rainy season and harvested after the monsoon.
Step-by-Step Solution
Kharif crops are sown at the beginning of the rainy season.
Examples include:
- Maize
- Rice
- Cotton
- Soybean
Pea, gram, and wheat are Rabi crops grown during winter.
Therefore, the correct answer is: Maize.
Exam Tip
Remember:
Kharif → Rainy Season
Rabi → Winter Season
Q2. Chemical substances which are rich in a particular nutrient are called?
A) Fertilizer
B) Manure
C) Pesticides
D) Compost
Answer
Fertilizer
Concept Behind This Question
Fertilizers are manufactured substances that provide specific nutrients required for healthy plant growth.
Step-by-Step Solution
Fertilizers mainly supply nutrients such as nitrogen, phosphorus, and potassium (NPK).
Unlike manure, fertilizers contain concentrated nutrients and act more quickly.
Therefore, the correct answer is: Fertilizer.
Exam Tip
Remember:
Fertilizers = Nutrient-rich chemicals
Manure = Natural organic material
Q3. The process of loosening and turning of the soil is called?
A) Harvesting
B) Irrigation
C) Sowing
D) Tilling (Ploughing)
Answer
Tilling (Ploughing)
Concept Behind This Question
The first step in crop cultivation is preparing the soil by loosening and turning it.
Step-by-Step Solution
Tilling improves soil aeration, helps roots grow deeper, and mixes manure uniformly into the soil.
It also allows water to penetrate the soil more effectively.
Therefore, the correct answer is: Tilling (Ploughing).
Exam Tip
Always remember that soil preparation takes place before sowing seeds.
Q4. Small organisms which can be seen only with the help of a microscope are called?
A) Microorganisms
B) Fungi
C) Bacteria
D) Algae
Answer
Microorganisms
Concept Behind This Question
Microorganisms are living organisms that are too small to be seen with the naked eye.
Step-by-Step Solution
Microorganisms include bacteria, fungi, protozoa, algae, and some viruses.
Since bacteria, fungi, and algae are only groups of microorganisms, the most appropriate answer is Microorganisms.
Therefore, the correct answer is: Microorganisms.
Exam Tip
Remember that bacteria, fungi, algae, and protozoa are all types of microorganisms.
Q5. The process of separating grains from the chaff is called?
A) Sowing
B) Storage
C) Threshing
D) Weeding
Answer
Threshing
Concept Behind This Question
After harvesting, grains are separated from the stalks and husk through threshing.
Step-by-Step Solution
Threshing removes grains from harvested crop plants.
It can be done manually or with the help of threshing machines and combine harvesters.
Therefore, the correct answer is: Threshing.
Exam Tip
Do not confuse:
- Threshing → Separating grains from harvested plants
- Winnowing → Separating grains from lighter chaff using wind
Important Formulas & Concepts
1. Kharif Crops
- Grown during the rainy season.
- Examples: Rice, Maize, Cotton, Soybean.
2. Rabi Crops
- Grown during the winter season.
- Examples: Wheat, Gram, Mustard, Pea.
3. Fertilizers
Chemical substances rich in plant nutrients.
Major nutrients:
- Nitrogen (N)
- Phosphorus (P)
- Potassium (K)
4. Tilling (Ploughing)
Benefits:
- Loosens soil
- Improves aeration
- Promotes root growth
- Mixes manure evenly
5. Microorganisms
Main groups:
- Bacteria
- Fungi
- Protozoa
- Algae
- Viruses
6. Threshing
Process of separating grains from harvested crop plants before storage.
Related Practice Questions
- Name two important Kharif crops.
- What is the difference between manure and fertilizer?
- Why is tilling necessary before sowing?
- Name four groups of microorganisms.
- What is the difference between threshing and winnowing?
Mini Quiz Challenge
True or False
- Wheat is a Kharif crop.
- Fertilizers contain specific plant nutrients.
- Tilling is done after harvesting.
- Bacteria are microorganisms.
- Threshing separates grains from harvested plants.
Exam Tips
✔ Learn the examples of Kharif and Rabi crops.
✔ Revise the difference between fertilizers and manure.
✔ Remember the sequence of agricultural practices.
✔ Identify different groups of microorganisms.
✔ Understand the purpose of threshing and winnowing.
Quick Revision Notes
✔ Maize is a Kharif crop.
✔ Fertilizers provide essential nutrients to plants.
✔ Tilling is the first step in crop production.
✔ Microorganisms can only be seen with a microscope.
✔ Threshing separates grains from harvested crops.
✔ Winnowing removes lighter chaff from grains.
Common Mistakes Students Make
❌ Confusing Kharif crops with Rabi crops.
❌ Treating manure and fertilizer as the same.
❌ Thinking irrigation is the first agricultural activity.
❌ Assuming bacteria and microorganisms are different concepts.
❌ Confusing threshing with winnowing.
Key Takeaways
- Maize is an important Kharif crop.
- Fertilizers are nutrient-rich chemical substances.
- Tilling prepares the soil for healthy crop growth.
- Microorganisms include bacteria, fungi, algae, and protozoa.
- Threshing separates grains from harvested plants before storage.
FAQs
1. Which crop is a Kharif crop?
Maize is a Kharif crop.
2. What is a fertilizer?
A fertilizer is a chemical substance rich in essential plant nutrients.
3. What is tilling?
Tilling is the process of loosening and turning the soil before sowing seeds.
4. What are microorganisms?
Microorganisms are tiny living organisms that can only be seen with a microscope.
5. What is threshing?
Threshing is the process of separating grains from harvested crop plants.
Conclusion
This Class 8 Science MCQ Practice Set covers important NCERT concepts from crop production and microorganisms. Regular practice helps students strengthen their understanding of agricultural practices, plant nutrition, and microscopic life while improving their preparation for school examinations and competitive tests.
NCERT Reference
Book: NCERT Science Class 8
Relevant Chapters:
- Chapter 1: Crop Production and Management
- Chapter 2: Microorganisms: Friend and Foe
Based On: Latest NCERT Curriculum (CBSE)
Related links
- Class 8 Maths Chapter 2 Linear Equations in One Variable – part 10
- Class 8 Maths Chapter 2 Linear Equations in One Variable – Part 9
- Class 8 Maths Chapter 2 Linear Equations in One Variable- Part 8
- Class 8 Maths Chapter 2 Linear Equations in One Variable- Part 7
- Class 8 Maths Chapter 2 Linear Equations in One Variable- Part 6
- Class 8 Maths Chapter 2 Linear Equations in One Variable transposition method- Part 5
- Class 8 Maths Chapter 2 Linear Equations in One Variable – Part 4
- Class8 Maths Chapter2 Transposition method, variables – Part 3
- Class 8 Maths Chapter 1 Rational Numbers- Part 10
Latest Posts
- Class 9 Maths Chapter 4 Linear Equations in Two Variables
- Class 7 Maths Chapter 4 Simple Equations
- Class 8 Maths Chapter 4 Practical Geometry
- Class 10 Maths Chapter 4 Quadratic Equations
- Class 9 Science Chapter 1 Matter in Our Surroundings
Join Our Other Communities
Instagram , Youtube , Facebook
