Sound I
Part of a sound wave that has many molecules squeezed together.
Compression.
How sounds are made.
What is objects vibrating.
Sound waves move ___________ (towards, away from) the source of the vibrations.
What is away from.
A series of small fast movements back and forth or from side to side.
What are vibrations.
Sound travels fastest through a __________(gas, liquid, solid).
What is solid.
Number of wavelengths that pass each second.
What is frequency.
The higher the frequency of a soundwave, the higher the _________________________.
What is pitch.
Sound is a form of _____________________.
Energy?
The areas of a sound wave where molecules are spread out.
What is rarefaction.
How a sound wave moves when it hits flat, firm surfaces, much of it is _______.
What is reflected.
Sound is measured in ______________.
What is decibels?
Name three animals that use sound waves to hunt or communicate.
Dolphins, whales, bats, etc.
The name of the wave that contains compressions and rarefactions.
What is longitudinal.
This body part vibrates and allows humans to hear sound.
Ear drum
Sound would travel most quickly through which object: air, wood, outer space or water.
What is wood
Animals use this to find objects and judge distances.
What is echolocation?
A system that works under water by sending sound waves to map out the ocean floor.
What is sonar.
Something that has weight and takes up space is...
Matter
Name the five types of energy we have learned about.
Mechanical, electrical, light, thermal, sound.