CBSE Class 8 Science The Invisible Living World: Beyond Our Naked Eye (Class 8 NCERT New) Quiz 1

1. If the invisible world around you became visible, what might you see?

A Things that are normally hidden from sight B Only bright lights C Just empty space D Nothing unusual

2. Observing the hidden world might change the way you think about size, complexity, or what counts as 'living'. What is a likely effect of such observation?

A It can expand your understanding of what is considered 'living' and reveal unexpected complexity in small organisms. B It will make you believe that only large organisms are complex. C It will convince you that size is the only factor in determining life. D It will show that all living things are simple and easy to understand.

3. Have you thought how these tiny living beings interact with each other?

A They communicate and affect each other's survival. B They ignore each other completely. C They only compete for food and never cooperate. D They live in isolation without any interaction.

4. Share your questions

A You can share your questions. B You cannot share your questions. C Questions cannot be shared. D Sharing questions is not allowed.

5. What is this curved piece of glass called?

A Lens B Mirror C Prism D Glass sheet

6. All living beings, whether plants or animals, are called ________.

A organisms B minerals C machines D objects

7. You might have seen some people using reading glasses. How does it help them see better? Or what happens when we use a magnifying glass to observe something?

A Reading glasses and magnifying glasses help by making objects appear larger and clearer. B Reading glasses and magnifying glasses change the color of objects. C Reading glasses and magnifying glasses make objects appear farther away. D Reading glasses and magnifying glasses make objects invisible.

8. Activity 2.1: Let us observe Take a round-bottom flask made up of glass as shown in Fig. 2.1. Fill it with water. Close the mouth of the flask with a cork. Now, place the flask on an open book and look at the letters through it. What happens to the appearance of the letters when seen through the flask filled with water?

A The letters appear larger. B The letters appear smaller. C The letters become blurry. D The letters disappear completely.

9. For a long time, people were curious to explore the tiny organisms around them, but they could not see them with their naked eyes. So, how did we finally discover this invisible world? Do you know which scientific discovery helped us see the tiny world for the first time?

A The invention of the microscope B The discovery of electricity C The development of the telescope D The creation of the steam engine

10. In 1665, a scientist named Robert Hooke published a book called Micrographia. What tool did he use to observe tiny things that people had never seen before?

A Telescope B Microscope C Magnifying glass D Binoculars