Grade 4 worksheets on how light travels and shadows.

💡 Topic Summary

Light travels in straight lines. When light hits an object, it can be blocked, creating a shadow. The shape of the shadow depends on the shape of the object and the position of the light source. Shadows are darker when the object is closer to the light source and larger when the object is farther away from the light source.

Imagine shining a flashlight on a ball. The ball blocks the light, and you see a dark area behind it – that's the shadow! Understanding this helps us learn about how light interacts with different objects.

🧪 Part A: Vocabulary

Match the terms with their definitions:

• 🔍 1. Opaque matches with C.
• 💡 2. Transparent matches with B.
• 📝 3. Translucent matches with D.
• 🌍 4. Light Source matches with E.
• 🍎 5. Shadow matches with A.

✍️ Part B: Fill in the Blanks

Light travels in ________ lines. A ________ is formed when an object blocks light. Opaque objects ________ light, while transparent objects ________ light to pass through completely. The ________ of a shadow depends on the object blocking the light.

Possible Answers:

• 🔍 Straight
• 💡 Shadow
• 📝 Block
• 🌍 Allow
• 🍎 Shape

🤔 Part C: Critical Thinking

Imagine you are in a room with only one lamp. How can you make the biggest shadow possible on the wall?

• 💡 Place the object closer to the light source.