Waves and Light
Electromagnetic waves are produced by this.
What is a vibrating electric charge?
This region has the longest wavelengths.
What are radio waves?
RADAR stands for this
What is RAdio Detecting And Ranging?
UV waves striking the skin help the body make this vitamin.
What is vitamin D?
Bananas are slightly radioactive.
True
This is the speed of electromagnetic waves in a vacuum.
What is 300,000 km/s?
This is the only region the human eye can detect
What is visible light?
This medical imaging uses a strong magnet and radio waves to map soft tissue.
What is MRI?
These waves pass through skin and muscle but are absorbed by bone.
What are X-rays?
Lightning is hotter than the surface of the Sun.
True
Because the electric and magnetic fields vibrate at right angles to the direction of travel, EM waves are this type of wave.
What is a transverse wave?
This region sits between microwaves and visible light.
What is infrared?
A microwave oven makes these molecules rotate back and forth billions of times a second.
What are water molecules?
These chemicals, once used in refrigerators and air conditioners, damage the ozone layer.
What are CFCs (chlorofluorocarbons)?
In space, you can hear an explosion if it’s loud enough.
False
Sunlight takes about this many minutes to travel 150,000,000 km to Earth
What is about 8.3 minutes?
These waves have the highest-energy photons. The last on the EM Spectrum
What are gamma rays?
This is why a microwave oven can’t warm frozen water.
What is: the molecules are locked in a crystal and can’t rotate?
Scientists use this to condense large numbers into small digestible figures,
What is scientific notation?
Some snakes can sense the infrared waves given off by warm animals.
True