3rd Grade Science: Understanding Sound

Sound is a type of ______ made by vibrations.

When an object vibrates, it causes movement in the ______ particles.

The movement of air particles, called ______ waves, keeps going until they run out of energy.

The ______ the vibrations, the louder the sound.

If an object vibrates slowly, we hear a ______ pitched sound.

Sound waves can bounce off smooth, hard objects in the same way as a rubber ball bounces off the ______.

The quality of a sound is related to its ______, which can be high or low.

The louder the sound, the ______ the vibrations.

An object that vibrates quickly produces a ______ sound.

If your ear is within range of the vibrations, you hear the ______.

Sound is a type of energy made by vibrations.
When an object vibrates, it causes movement in air particles, which then bump into nearby particles, creating sound waves.

Sound is created when an object vibrates, sending waves of energy to our ears through the air or another medium (solid, liquid, or gas).
The stronger the vibrations, the louder the sound.
Sounds become fainter as you move away from the sound source.

Volume (loudness) is related to the strength, intensity, pressure, or power of the sound.
Bigger/amplified vibrations result in bigger/louder sounds.

Pitch is the quality of a sound (high or low) and depends on the speed of the vibrations.
Faster vibrations produce high-pitched sounds, while slower vibrations produce low-pitched sounds.
Different materials produce different pitches.

An echo is a sound that is repeated because sound waves are reflected.
Sound waves can bounce off smooth, hard objects, similar to a rubber ball bouncing off the ground.