Light travel and blocking quiz for 4th graders with answers.

📚 Quick Study Guide

• 🔦 Light travels in a straight line.
• 🌑 When light is blocked, it creates a shadow.
• 🍎 Opaque objects block light completely (like a book or an apple).
• 👓 Translucent objects let some light through (like frosted glass).
• 💧 Transparent objects let almost all light through (like clear glass or water).
• ☀️ The size of a shadow depends on how close the object is to the light source.
• 💡 Light sources can be natural (like the sun) or artificial (like a lamp).

🧪 Practice Quiz

1. Which of these objects is opaque?
   1. A. Clear glass
   2. B. Wax paper
   3. C. A wooden door
   4. D. Colored plastic
2. What happens when light is blocked by an object?
   1. A. It creates heat
   2. B. It creates a shadow
   3. C. It creates more light
   4. D. It disappears
3. Which object allows almost all light to pass through?
   1. A. A brick
   2. B. A mirror
   3. C. Clear water
   4. D. A piece of cardboard
4. Light travels in a:
   1. A. Circle
   2. B. Zigzag line
   3. C. Straight line
   4. D. Curved line
5. What is the main source of natural light on Earth?
   1. A. The Moon
   2. B. A lamp
   3. C. The Sun
   4. D. A flashlight
6. Which of these objects is translucent?
   1. A. Aluminum foil
   2. B. Frosted glass
   3. C. A metal spoon
   4. D. A textbook
7. If you move an object closer to a light source, what happens to the shadow?
   1. A. The shadow gets smaller
   2. B. The shadow disappears
   3. C. The shadow gets larger
   4. D. The shadow stays the same size