(Science G5) - Unit 2: Sound

Sound

What our ears hear when things move quickly, like air rushing past a fast train.

Volume

How loud or quiet a noise is, like the rumble of a heavy truck.

Vibration (noun)

This is a very quick back and forth movement, like a string shaking.

Source

The place where something starts, like a bird singing in a tree for example.

Material

Any kind of physical substance or object, like wood, plastic, or even soft glass.

Decibel

A unit used to measure how strong a noise is, like 20 for a whisper.

Air

The invisible gas all around us that we breathe, like the wind outside today.

Decibel

A unit used to measure how strong a noise is, like 20 for a whisper.

Pitch

How high or low a sound feels, like a tiny whistle or a drum.

Silencer

A part added to a machine to make it quieter, like on a fast motorcycle.

Amplifier

A machine that takes a small noise and makes it much bigger, like for an alarm.

Noise

Any kind of sound that you might hear, like a loud bang or a shout.

Noise Pollution

Too much loud and annoying sound in our environment, like traffic in a busy city.

Pattern

A way things repeat in a regular order, like how sound drops off over distance.

Variable

A thing that can change in a test, like the different objects we use.

Loud (Adjective)

Having a very strong, big sound, like a drum in the band.

High-pitched (Adjective)

Having a very sharp and thin sound, like a small whistle.

Low-pitched

Having a very deep, thick sound, like a big drum or lion.

Fainter

Being much softer and harder to hear, like a whisper far away.

Travel (Verb)

To move from one spot to another, like a sound moving through a long tube.

Pluck (Verb)

To pull and let go of something, like plucking a string .

Observe (Verb)

To watch something very carefully, like a scientist in a lab.

Measure

To find the size or amount of something, like using a ruler.

Predict

To say what will happen before it does, like tomorrow’s weather.

Record

To write down the results of a test, like in a notebook.

Cause

To make something happen, like rain making the grass wet.

Hum

To make a low sound in your throat, like a sleepy cat.

Reduce

To make something smaller or less, like turning down the volume.

Tighten

To make something pulled very hard, like a rope holding a heavy tent.

Loosen

To make something less tight, like a screw on a loose wooden chair.

Muffle

To make a loud noise softer by covering it, like with heavy winter curtains.