Chapter-14 Magnifying Glass — Online MCQ Test
ENGLISH · Grade 8 · CBSE(NCERT)
Practice Chapter-14 Magnifying Glass with a free chapter-wise online MCQ test.
This chapter covers: empirical observation - microscopic detail - lens - scientific observation - natural textures.
AI-generated questions from basic to board-exam level, with instant results and explanations.
Chapter-14 Magnifying Glass — Important Questions & Answers
What is the primary purpose of using a magnifying glass in scientific observation?
- A. To make objects appear larger so we can see microscopic details
- B. To change the color of objects being observed
- C. To protect our eyes from bright light
- D. To reduce the size of objects for easier handling
Answer: A. To make objects appear larger so we can see microscopic details
A magnifying glass uses a lens to magnify or enlarge objects, allowing us to observe details not visible to the naked eye.
A magnifying glass uses a lens to magnify or enlarge objects, allowing us to observe details not visible to the naked eye.
Which of the following is an example of natural texture that can be observed with a magnifying glass?
- A. The smooth surface of plastic
- B. The veins on a leaf or the ridges on tree bark
- C. The printed text on paper
- D. The metal surface of a coin
Answer: B. The veins on a leaf or the ridges on tree bark
Natural textures like leaf veins and tree bark patterns are created by nature and become visible when magnified with a magnifying glass.
Natural textures like leaf veins and tree bark patterns are created by nature and become visible when magnified with a magnifying glass.
How does scientific observation with a magnifying glass differ from casual looking?
- A. Scientific observation is not systematic or detailed
- B. Scientific observation involves careful, systematic examination to identify and record specific details
- C. There is no difference between the two methods
- D. Scientific observation only requires glancing at an object quickly
Answer: B. Scientific observation involves careful, systematic examination to identify and record specific details
Scientific observation is methodical and purposeful, documenting specific details and patterns, unlike casual observation which may be random.
Scientific observation is methodical and purposeful, documenting specific details and patterns, unlike casual observation which may be random.
Compare the observation of a butterfly wing with naked eye versus with a magnifying glass. Which statement is most accurate?
- A. Both methods reveal exactly the same information
- B. The magnifying glass reveals intricate scale patterns and texture details invisible to the naked eye
- C. The naked eye provides more detailed information than a magnifying glass
- D. Neither method reveals any useful information about wings
Answer: B. The magnifying glass reveals intricate scale patterns and texture details invisible to the naked eye
Magnification reveals microscopic details like scales and fine texture on butterfly wings that are invisible to the unaided eye.
Magnification reveals microscopic details like scales and fine texture on butterfly wings that are invisible to the unaided eye.
A student claims that using a magnifying glass is not 'real' observation because the glass changes what we see. How would you respond to this claim?
- A. The student is correct; magnifying glasses distort reality
- B. The student is incorrect; magnifying glasses reveal actual details that exist but are normally invisible, making observation more complete
- C. Magnification is useful but less valid than naked eye observation
- D. All tools used in observation are unreliable
Answer: B. The student is incorrect; magnifying glasses reveal actual details that exist but are normally invisible, making observation more complete
Magnifying glasses do not distort reality; they make existing microscopic details visible, providing more complete and accurate information about the object.
Magnifying glasses do not distort reality; they make existing microscopic details visible, providing more complete and accurate information about the object.