8th Grade Unit 2 Sound Vocabulary Review

The definition of amplitude is:

• The maximum extent of a vibration or oscillation, measured from the position of equilibrium.

• The rate at which an object covers distance.

• The amount of space that a substance or object occupies.

• The force exerted by a mass under the influence of gravity.

Which of the following is an example of high amplitude?

• A) A whisper

• B) A fire alarm

• C) A gentle breeze

• D) A soft hum

True or False: Elephants can communicate through low-amplitude sounds that humans can’t hear.

• True

• False

The brain is defined as:

• A complex organ that controls thought, memory, emotion, touch, motor skills, vision, breathing, temperature, and every process that regulates our body.

• A simple muscle that pumps blood throughout the body.

• A type of bone that supports the body structure.

• A fluid that circulates nutrients and removes waste from the body.

Provide an example of how the brain responds when you touch something hot.

• The brain sends a signal to move your hand away.

• The brain increases the temperature of your hand.

• The brain ignores the sensation.

• The brain sends a signal to touch it again.

What fun fact is mentioned about the brain's electricity production?

• The brain produces enough electricity to power a small light bulb.

• The brain's electricity can power a car.

• The brain produces no electricity.

• The brain's electricity is only theoretical.

What is the cochlea?

• A part of the brain

• A spiral-shaped part of the inner ear that turns sound vibrations into signals for the brain

• A type of musical instrument

• A nerve in the ear.

Fill in the blank: When you hear music, your cochlea changes the sound waves into _______ so your brain can understand it.

• nerve signals.

• light signals.

• chemical signals.

• magnetic signals.

True or False: The cochlea is shaped like a snail.

• True

• False

What is the definition of 'Compression'?

• A process of reducing the size of data

• A method to increase data size

• A technique to duplicate data

• A way to delete data