Instructions
Read each section carefully and complete the activities. This worksheet will explore the fascinating ways light interacts with the world around us. Good luck!
Part 1: Vocabulary Match-Up
Match the term on the left with its correct definition on the right. Write the letter of the definition in the blank space.
| ____ 1. Photon | A. Allowing some light to pass through, but scattering it. |
| ____ 2. Reflection | B. The process of light energy being taken in by an object. |
| ____ 3. Absorption | C. A tiny particle or packet of light energy. |
| ____ 4. Transmission | D. Allowing all light to pass through so objects can be seen clearly. |
| ____ 5. Transparent | E. Not allowing any light to pass through. |
| ____ 6. Translucent | F. The bouncing of light off a surface. |
| ____ 7. Opaque | G. The passing of light through a material. |
Part 2: How Light Behaves
Complete the sentences below using the words from the word bank. Each word is used only once.
- Light travels in _______________________ until it hits an object.
- A black t-shirt feels hot in the sun because it has _______________________ most of the light energy.
- A clear window is considered _______________________ because it allows almost all light to pass through it.
- We see a banana as yellow because the surface of the banana _______________________ yellow light to our eyes.
- An object that does not let any light pass through it is called _______________________.
- A _______________________ is formed when an opaque object blocks the path of light.
Part 3: Classify the Object
For each object listed below, place a checkmark (✓) in the column that best describes how it interacts with light.
| Object | Transparent | Translucent | Opaque |
|---|---|---|---|
| A wooden door | |||
| A frosted glass window | |||
| A magnifying glass | |||
| A brick wall | |||
| Wax paper |
Part 4: Think & Explain
Use your knowledge of light and matter to answer the following questions in complete sentences.
-
Why does a green leaf look green in the sunlight? Explain in terms of light absorption and reflection.
-
Imagine you are in a dark room with a single red light bulb. What color would a white piece of paper appear to be? What about a blue toy car? Explain your reasoning for both objects.
Answer Key
Part 1: Vocabulary Match-Up
1. C - A tiny particle or packet of light energy.
2. F - The bouncing of light off a surface.
3. B - The process of light energy being taken in by an object.
4. G - The passing of light through a material.
5. D - Allowing all light to pass through so objects can be seen clearly.
6. A - Allowing some light to pass through, but scattering it.
7. E - Not allowing any light to pass through.
Part 2: How Light Behaves
- straight lines
- absorbed
- transparent
- reflects
- opaque
- shadow
Part 3: Classify the Object
| Object | Transparent | Translucent | Opaque |
|---|---|---|---|
| A wooden door | ✓ | ||
| A frosted glass window | ✓ | ||
| A magnifying glass | ✓ | ||
| A brick wall | ✓ | ||
| Wax paper | ✓ |
Part 4: Think & Explain
- A green leaf appears green because its surface absorbs most of the colors in sunlight (like red, orange, yellow, blue, and violet) but it reflects the green-colored light back to our eyes.
- The white piece of paper would appear red. This is because white objects reflect all colors of light. Since the only color available to reflect is red, the paper looks red. The blue toy car would appear black. The car's surface is designed to reflect blue light and absorb other colors. Since there is no blue light in the room to reflect, it absorbs the red light and reflects nothing, making it look black.