Electromagnetic Spectrum
Heat and Heat Flow
Sound
Law of Conservation of Energy
All Mixed Up
100
How is the electromagnetic spectrum organized?
by wavelength
100
Define temperature.
the average kinetic energy of all the atoms in a substance
100
How does sound travel?
as a vibration through a medium / as vibration of atoms
100
Define the law of conservation of energy.
Energy can not be created or destroyed but it can be converted from one form into another.
100
Waves move __________ but not ____________.
energy / matter
200
Name the parts of the electromagnetic spectrum in order.
radio waves, microwaves, infrared radiation, visible light, ultraviolet, x-rays, gamma rays
200
Define thermal energy.
the total kinetic energy of a substance
200
Changing the ___________ of a sound wave will change the pitch (how high or low it is).
frequency
200
Explain the energy conversion in a a ball that rolls down hill.
potential to kinetic
200
Draw and label the parts of a wave including the crest, trough, and wavelength.
crest - highest point of a wave trough - lowest point of a wave wavelength - the length of a wave measured from crest to crest or trough to trough
300
Which part of the electromagnetic spectrum has a wavelength the size of a football field?
radio waves
300
Your soup is too hot so you put an ice cube in it. Explain how the heat flows.
The heat flows from the hot soup to the ice cube.
300
Changing the ___________ of a sound wave will change the volume of a sound.
amplitude
300
Explain the energy conversion in a ball that is thrown straight up in the air and then falls back down.
kinetic to potential to kinetic
300
What is the relationship between wavelength and frequency?
As the wavelength increases the frequency decreases. As the frequency decreases, the wavelength increases.
400
Name 3 uses of ultraviolet light.
sterilize, detect forgery, get a sun tan, bees can see it on flowers
400
The specific heat of lead is 128, glass is 837, and iron is 448. Each substance is left outside in the sun on a hot day for one hour. If you were to touch them which would be hottest and which would be coolest?
hottest - lead coolest - glass
400
Sound travels fastest in this state of matter:
solid Bonus for 300 points: Why?
400
Explain the energy conversion in eating an apple and then taking a bike ride.
chemical to kinetic
400
What has more thermal energy, a 1 g block of ice or a 1 kg block of ice?
The 1kg block of ice has more thermal energy.
500
Part 1: What produces all types of electromagnetic energy? Part 2: How does this energy travel?
Part1: the sun Part 2: radiation
500
Name the three temperature scales.
Celsius, Fahrenheit, and Kelvin
500
Sound will travel faster in ________ air because the atoms have ___________.
warmer / more kinetic energy
500
Explain the energy conversion in a burning candle.
chemical to electromagnetic and thermal
500
What has more thermal energy, iced tea or hot tea?
Trick question! You can not tell unless you know the mass of each substance.
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