Grade 4 Light and Sound Vocabulary

Front

What is Light?

Back

Light is a form of energy that we can see. It helps us see the world around us!

Front

How does light travel?

Back

Light travels in a straight path until it hits something.

Front

What are opaque materials?

Back

Materials that do not let any light pass through them, such as wood and metal.

Front

What are translucent materials?

Back

Materials that let some light pass through, but not all, such as frosted glass and wax paper.

Front

What are transparent materials?

Back

Materials that let all light pass through them, such as clear glass and clean water.

Front

What are natural light sources?

Back

Natural light sources include the sun, stars, and fireflies.

Front

What are artificial light sources?

Back

Artificial light sources include light bulbs, flashlights, and candles.

Front

What is Sound?

Back

Sound is a form of energy that travels in waves caused by vibrations.

Front

How does sound travel?

Back

Sound travels in waves through air, water, or solids and cannot travel without a medium.

Front

What does it mean to absorb sound?

Back

Some materials, like carpets and curtains, can absorb sound, making it quieter.