Radiant Energy
Radiant energy is energy associated with electromagnetic "waves". What is the one main word I had you add to your notes about Radiant energy?
light
Mechanical energy is related to an object's ___ and position.
motion
Electrical energy is the energy associated with flowing ___.
electrons
Thermal energy is associated with ___ through contact.
heat
TRUE or FALSE? Energy can transform from one form to another (example: electricity -> motion)
TRUE
TRUE or FALSE: Ocean waves are an example of radiant energy.
FALSE, ocean waves are example of mechanical motion. We cannot usually see the "waves" of light with our own eyes.
Water flowing down a river has mechanical energy due to its elevated position and ___ pulling it down toward the center of the earth.
gravity
Give an example of static electricity.
lightning,
hair sticking to balloon,
hair sticking to plastic playground slide,
shocking someone after walking on carpet with socks on
How did we transfer thermal energy from our bodies to the cooler surface of the desk?
making contact with our hand
Complete the energy transformation: a wind turbine transforms mechanical energy of the wind into ___ energy.
electrical
TRUE or FALSE: we can see all of the radiant energy that is being emitted by the sun.
FALSE, in addition to the light that lets us see things, the sun also emits UV light, among other non-visible light wavelengths
A ___ is an example of mechanical energy that is caused by things around us vibrating the air at a frequency that our ears and brains can detect.
sound
for example a vibrating guitar string or a vibrating bell after it has been struck
What do we call electricity that can flow continuously through wires, like a phone charger?
current electricity
TRUE or FALSE: all warm-blooded animals are able to be examples of thermal energy
TRUE, warm-blooded animals use energy they get from eating food to keep their bodies at a certain temperature
Rubbing our hands together is an example of ___ energy being transformed into thermal energy.
mechanical
What are two examples of radiant energy that is non-visible to humans?
x-rays,
ultraviolet rays (UV),
infrared waves,
microwaves,
radio waves (like Bluetooth or Wi-Fi),
gamma waves
TRUE or FALSE: There must be a machine or some man-made tool to have mechanical energy.
FALSE; wind, waterfalls, and ocean waves are two examples of mechanical energy that don't require a machine
What are two naturally occurring examples of mechanical energy, that we can build things that transform that motion into electrical energy?
water flowing downhill (hydroelectric dams),
wind (wind turbines)
TRUE or FALSE: something can have radiant AND thermal energy
True, like a flame!
The electrical energy in the outlets of your house is transformed into ___ energy by your microwave oven when it sends invisible microwaves into your food.
radiant
Inside a microwave oven, radiant energy is transformed into ___ energy when your food is heated.
thermal
If there is no air in outer space, can our ears detect the vibration of someone singing?
No!
Our ears need something like air to be able to detect the vibrations of sounds, also our vocal cords need air to vibrate so we can even use our voices. Imagine sounds are similar to the ripples after something hits the surface of a pond, but instead of water it's the air around us that is rippling in all directions.
Complete the energy transformation: a photovoltaic solar panel transforms ___ energy into electrical energy.
radiant
When you hold an ice cube, there is no "cold energy" just more or less thermal energy; and thermal energy tends to transfer from hotter to less hot things. So in this example the thermal energy is transferred from the ___ to the ___.
Thermal energy is transferred from the hand to the ice cube.
An electronic bell transforms electrical energy into ___ energy that makes a vibrating sound.
mechanical