[T2] Science Summative (Exploring Light and Sound Energy)

Name one property of light.

• Light is invisible to the human eye.

• Light travels in straight lines.

• Light can only travel in circles.

• Light is a solid object.

What happens to light when it hits a mirror?

• Light passes through the mirror without any change.

• Light bends and changes direction when hitting the mirror.

• Light is absorbed by the mirror completely.

• Light reflects off the surface of a mirror.

What is refraction?

• Refraction is the reflection of light off a surface.

• Refraction is the scattering of light in different directions.

• Refraction is the bending of light as it passes from one medium to another.

• Refraction is the absorption of light in a medium.

How does light travel?

• Light is a solid substance that can be touched.

• Light moves faster in water than in a vacuum.

• Light travels in waves and particles (photons) at a speed of about 299,792 km/s in a vacuum.

• Light travels only in straight lines.

What is the difference between a transparent and an opaque object?

• Both transparent and opaque objects allow light to pass through.

• Opaque objects can be seen through; transparent objects cannot.

• Transparent objects block light; opaque objects allow light to pass through.

• Transparent objects allow light to pass through; opaque objects do not.

What is a shadow?

• A shadow is a reflection of an object.

• A shadow is a type of light.

• A shadow is a dark area produced when an object obstructs light.

• A shadow is a solid object.

What are the primary sources of natural light?

• Electric lights

• Fireflies

• Bioluminescent organisms

• The sun, moon, stars, and auroras.

What is the unit of frequency for sound waves?

• Hertz (Hz)

• Joules (J)

• Decibels (dB)

• Watts (W)

How does the pitch of a sound relate to its frequency?

• The pitch of a sound increases with its frequency.

• The pitch of a sound decreases with its frequency.

• Higher frequency sounds are perceived as quieter in pitch.

• Frequency has no effect on the pitch of a sound.

What is an example of sound energy in everyday life?

• A light bulb turning on

• A refrigerator humming

• Music played from a speaker

• A car engine running