Lesson 8 Vocab
_____________________ is the ability of someone or something to do work.
energy
___________________ fuels are a great source of fuel left over from the remains of plants and animals.
fossil
Sound is a __________________ that travels through materials from a source.
vibration
A __________________________ is the sound created when something travels faster than the speed of sound.
sonic boom
Energy whose source does NOT run out is called ______________________.
renewable
_______________________ energy is stored up and waiting to be used.
potential
We call the energy inside the nucleus of an atom _________________ energy.
nuclear
Waves with a higher ___________________ are louder.
amplitude
If a sound is too low for the human ear to hear, we call it ________________.
infrasound
__________________ is made up of dead plants and turned into carbon and used as energy.
coal
When potential energy is increased by raising an object to a greater height, we call this special change __________________ energy.
gravitational
The liquid form of fossil fuels is usually called _____________________.
oil
A source causes molecules to move, which pass the movement to other molecules, creating a sound _____________.
wave
The speed of sound is _______ mph or _________________.
(need to know at least one)
760; Mach 1
A jet that travels faster than the speed of sound is said to be traveling at
_____________________ speed.
supersonic
_______________________ energy is energy in motion.
kinetic
Fossils can also make _________________ _______________, also called methane that we use as fuel.
natural gas
An ____________ is a sound that leaves a source, then bounces off of something and then returns to its source.
echo
________________ describes the quality of sound, which may be pleasant or unpleasant.
Timbre
When we measure how loud or soft a sound is, we use a measurement
called _________________.
decibels
Most of the potential energy in and around us is stored as _______________ energy.
chemical
Scientists learned that if you hit an atom with a ________________________ you can split it and release a large amount of energy. This is called nuclear ____________________.
neutron; fisson
Sound is ____________________ from one molecule to another. This means it is led from one place to another.
conducted
Scientists who study the sounds that are made by wildlife are working in the field of __________________________.
bioacoustics
The number of sound waves per second is a measure of
____________________: less than 20 is called __________________ and more
than 20,000 is called_____________________.
frequency; infrasound; ulltrasound