2 pt 3 pt 4 pt 5pt 1 pt 2 pt 3 pt 4 pt 5 pt 1 pt 2pt 3 pt 4pt 5 pt 1pt 2pt 3 pt 4 pt 5 pt 1 pt 2 pt 3 pt 4pt 5 pt 1pt Vocabulary Sound

What is a vibration?

A quick back and forth motion

What is an amplitude?

Measuring how loud or soft a sound is

What is a pitch?

How high or low a sound is

What is a wave length?

The distance from a point on one wave, to the same point on another wave

What is a frequency?

When you measure the number of waves that pass in a second

What is reflection?

A wave’s bouncing off a surface

What is absorption?

It stops sound waves from reflecting or traveling any farther

What is transmission?

When sound waves keep moving through materials to produce sound

What is a material that allows electricity to travel through it easily?

conductor

What is a simple machine made up of two inclined planes back to back?

wedge

What unit is used to measure the loudness of common sounds?

Decibel

Which kind of sound is produced by sound waves with peeks that are very close together?

High

While hiking, Christia calls her friend’s name loudly. What might she hear when the sound waves bounce off the smooth surface of a cliff?

An echo

Which part of the ear acts as a funnel for sound waves?

The outer ear

Sound waves cause which part of the ear to vibrate first?

Eardrum

In which part of the ear are vibrations changed to nerve signals.

Cochlea

Which is softer than normal conversation? A.Light whisper B. Noisy office C. Normal Traffic D. Rock music concert

A. Light whisper

Which is louder than a rock music concert? A. Jet takeoff B.Normal Conversation C. Noisy Office D. Normal Traffic

A. Jet takeoff

How is current electricity different from static electricity?

Static electricity is a build up of charges in one places and current electricity is charges in motion

What are the 3 purposes of the skeletal system?

1.Protect organs 2. Supports the body 3. Helps you move

When riding in a car, you notice that the wheels make sounds against the pavement. The pitch rises as the car speeds up. State a hypothesis based on this observation.

The pitch of the wheels increases with speed because the vibrations caused by the wheels get faster as the car moves faster.

You want to experiment to test how well various materials muffle sounds. Which variables would you keep the same and which would you change?

Same: person listening, sound being blocked, room where test is made. Change: material blocking sounds.

What instrument plays at a higher pitch, a bass or a violin?

A violin

Olivia is standing at her front door. Her friend Gabe is five houses down the street. Olivia yells, “Gabe!” How is the sound of Olivia’s voice transmitted to Gabe?

The sound is transmitted by the vibrations of air molecules between Olivia and Gabe.

Gabe doesn’t hear Olivia when she calls. When she calls again, what are two things she can do to make sure that Gabe hears her?

Move closer so that the sound doesn’t have to travel so far and yell louder by cupping her hands around her mouth to direct the sound waves in Gabe’s direction.