This quiz works best with JavaScript enabled. Home > Class 7 > Class 7 Science Chapter 11 Light – Quiz 9 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 7 Science Chapter 11 Light Quiz 9 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Choose the statement that best describes light reaction. A) It converts CO2 to sugar molecule. B) It converts light energy to chemical energy of ATP and NADPH. C) It takes place in the stroma. D) None of the above. Show Answer Correct Answer: B) It converts light energy to chemical energy of ATP and NADPH. 2. Caleb is sitting near the window on a sunny day. When he closes the curtain, the room becomes darker. What property of the curtain allows it to make the room darker? A) The curtain absorbs light. B) The curtain is brightly colored. C) The curtain folds easily. D) The curtain is rectangular shape. Show Answer Correct Answer: A) The curtain absorbs light. 3. What word means to bend light rays away from each other? A) Converging light. B) Diverging light. C) Virtual Light. D) Real Light. Show Answer Correct Answer: B) Diverging light. 4. If the radius of curvature of a lens is 40 cm, then then the focal length of lens is A) 10. B) 40. C) 60. D) 20. Show Answer Correct Answer: D) 20. 5. How you can see above head object with out lifting head? A) Periscope. B) Opthalomoscope. C) Kaleidoscope. D) Pin hole camera. Show Answer Correct Answer: A) Periscope. 6. Which statement is not something that makes an aircraft lighter than air aircraft? A) Part of aircraft is filled with a gas that is lighter than air (helium hydrogen). B) Supported by the flow of the air over the lifting surfaces (wings). C) Heat the inside to a high temperature. D) None of the above. Show Answer Correct Answer: B) Supported by the flow of the air over the lifting surfaces (wings). 7. The change in the converging power of an eye lens is caused by the action of A) Iris. B) Ciliary muscles. C) Optic nerve. D) Retina. Show Answer Correct Answer: B) Ciliary muscles. 8. The spreading of light as it enters the opening of a barrier. A) Reflection. B) Refraction. C) Interference. D) Diffraction. Show Answer Correct Answer: D) Diffraction. 9. We are able to see objects because they ..... light into our eyes. A) Reflect. B) Refract. C) Shine. D) Defract. Show Answer Correct Answer: A) Reflect. 10. What kind of objects make shadows? A) Our hands. B) Trees. C) Animals. D) All of the above. Show Answer Correct Answer: D) All of the above. 11. As the name suggests, images are inversed, i.e. the right part of an object appears on the left in its images, and the left part of the object appears to the right. This phenomenon is called ..... A) Bonding. B) Pneumonoultramicroscopicsilicovolcanoconiosis ( silicosis ). C) Refraction. D) Lateral Inversion. Show Answer Correct Answer: D) Lateral Inversion. 12. The image formed by convex mirror is virtual, erect, and is formed between 'P' and 'C' A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 13. Light travels faster than sound- A) Correct. B) Incorrect. C) Speed is same in both. D) None of the above. Show Answer Correct Answer: A) Correct. 14. Which one is not a source of light? A) Stars. B) Planets. C) Firefly. D) Sun. Show Answer Correct Answer: B) Planets. 15. ..... objects form dark shadows. A) Transparent. B) Translucent. C) Opaque. D) None of the above. Show Answer Correct Answer: C) Opaque. 16. Sky Looks blue because of? A) Refraction Of light. B) Scattering 0f light. C) Scattering Of light. D) Refraction 0f light. Show Answer Correct Answer: C) Scattering Of light. 17. Which of the following would not reflect light? A) Mirror. B) Water. C) Glasses. D) Brick Wall. Show Answer Correct Answer: D) Brick Wall. 18. If angle of incidence is equal to 50 degrees, then calculate the angle between the incident ray and the reflected ray. A) 50 degree. B) 100 degrees. C) 130 degrees. D) 80 degrees. Show Answer Correct Answer: B) 100 degrees. 19. Reflection is when ..... A) Light bends. B) A shadow is created. C) Light is absorbed. D) Light hits and then bounces off a surface. Show Answer Correct Answer: D) Light hits and then bounces off a surface. 20. At the junction of the optic nerve and the retina, no vision is possible because of no sensory cells at that spot. Name that spot. A) Blind spot. B) Junction spot. C) Sensory spot. D) Suspensory spot. Show Answer Correct Answer: A) Blind spot. 21. Black Paper is a transparent object. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 22. Sunlight contains all visible wavelengths of light. Each wavelength is a different color. When sunlight passes into and out of a raindrop, the light rays bend. Which color of light bends the most? A) Blue. B) Orange. C) Green. D) Red. Show Answer Correct Answer: A) Blue. 23. Newton's Disk works on when all colours A) Mixes. B) Grinds. C) Nothing. D) None of the above. Show Answer Correct Answer: A) Mixes. 24. Bends light rays inward towards a focal point. A) Refract. B) Reflect. C) Convex lens. D) Concave lens. Show Answer Correct Answer: C) Convex lens. 25. What happens if there are no light sources? A) It gets very bright. B) We can't hear anything. C) Everything goes invisible. D) It becomes so dark that we can't see. Show Answer Correct Answer: D) It becomes so dark that we can't see. ← PreviousNext →Related QuizzesClass 7 Science Chapter 11 Light Quiz 1Class 7 Science Chapter 11 Light Quiz 2Class 7 Science Chapter 11 Light Quiz 3Class 7 Science Chapter 11 Light Quiz 4Class 7 Science Chapter 11 Light Quiz 5Class 7 Science Chapter 11 Light Quiz 6Class 7 Science Chapter 11 Light Quiz 7Class 7 Science Chapter 11 Light Quiz 8Class 7 Science Chapter 11 Light Quiz 10Class 7 Science Chapter 11 Light Quiz 11 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books