CBSE Class 8 Science The Invisible Living World: Beyond Our Naked Eye (Class 8 NCERT New) Quiz 17

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CBSE › Class 8 › Science › The Invisible Living World: Beyond Our Naked Eye (Class 8 NCERT New)

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1. Why do we need a microscope to observe microorganisms?

A Because they are too bright to look at directly B Because they are too small to be seen with the naked eye C Because they are dangerous to touch D Because they are only found in laboratories

2. What is the purpose of using a coverslip when observing pond water under a microscope?

A To make the water taste better B To protect the microscope lens and keep the sample flat C To heat the sample D To color the sample

3. Suppose you want to observe microorganisms in soil. What is the safest way to collect the soil sample?

A Use your bare hands to collect the soil B Use a beaker and gloves or a spoon to collect moist soil C Collect dry soil only D Use a plastic bag without any tools

4. A student observes tiny organisms in pond water using a microscope. What reasoning can the student use to conclude these are microorganisms?

A The organisms are visible without any tools B The organisms are only found in textbooks C The organisms are too small to be seen with the naked eye and require magnification D The organisms are colorful

5. What is a soil suspension?

A A mixture of water and fine particles of soil B A mixture of water and sand C A mixture of oil and water D A mixture of air and water

6. What is the purpose of using a coverslip when observing a drop of soil suspension under a microscope?

A To add color to the sample B To prevent the sample from drying out and to keep it flat C To heat the sample D To make the sample heavier

7. What are microorganisms that cannot be seen with the naked eye also called?

A Animals B Microbes C Plants D Insects

8. Which of the following is a characteristic of Amoeba as observed in pond water?

A Multicellular, moves with legs B Single cell, moving, irregular shape C Green in color, does not move D Fixed shape, does not move

9. How does Paramecium move from one place to another?

A By floating on water B With the help of specialized structures C By crawling D By jumping

10. Why do algae look green?

A Because of the presence of green pigment B Because they reflect blue light C Because they are covered in moss D Because they are always in sunlight

Practice more on The Invisible Living World: Beyond Our Naked Eye (Class 8 NCERT New)

Quiz 1 Quiz 2 Quiz 3 Quiz 4 Quiz 5 Quiz 6 Quiz 7 Quiz 8 Quiz 9 Quiz 10 Quiz 11 Quiz 12 Quiz 13 Quiz 14 Quiz 15 Quiz 16 Quiz 17 Quiz 18 Quiz 19 Quiz 20 Quiz 21 Quiz 22 Quiz 23 Quiz 24 Quiz 25 Quiz 26 Quiz 27 Quiz 28

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