Sound Flashcards

What is sound?

Sound is a form of energy that travels in waves.

What causes a sound?

Something needs to move, which causes a vibration.

What is pitch?

How high or low a sound is.

What causes high and low-pitched sounds?

Vibrations that travel quickly create high-pitched sounds. Those that
travel slowly create low-pitched sounds.

Give examples of high and low-pitched sounds.

High-pitched - siren, flute, whistle, girl's scream
Low-pitched - tuba, lion's roar, frog's croak

How do instruments with strings make high and low-pitched sounds?

Short, thin strings make high-pitched sounds.
Long, thick strings make low-pitched sounds.

What is volume?

How loud or soft a sound is.

How can you change the volume of a sound?

When you use more force, it creates stronger vibrations and louder sounds.
When you use less force, weaker vibrations and softer sounds are created.

Give examples of loud and soft sounds.

Loud - car alarm, jet engine, jackhammer, etc.
Soft - cat purring, bees buzzing, mouse, whispering, etc.

How can you protect yourself from loud sounds?

Wear ear plugs or headphones.

Sound can travel through which types of materials?

Solids, liquids, and gases

Which material does sound travel through the best?

Sound travels through solids the best because the particles in a
solid are close together, which create lots of vibrations.

Which material does sound travel through the slowest?

Sounds travel through gases the slowest. There are very few particles
in a gas, so less vibrations will be created.

How does temperature affect sound?

Vibrations travel faster through warmer temperatures and slower
through colder temperatures.

Give examples of wind, percussion, and stringed instruments.

Wind - flute, trumpet, saxophone
Percussion - drums, xylophone
Stringed - guitar, violin, harp

How is an echo created?

Sound waves hit an object and bounce off.