Properties of Waves
The top of the wave is called a __________.
Crest
What type of materials absorb sound?
Things that are soft and porous
True or False: Light travels in a straight line.
True
True or false: Morse Code is still used today.
True!
Name the part of the ear that vibrates.
The distance from crest to crest.
Wavelength
What types of materials reflect sound
Hard, smooth surfaces
To give off light
Emit
Give two examples of how we use waves to communicate
Email, texts, TV, internet, cell phones, radio
The hole in your eye where light enters is called the ________
Pupil
True or false: Waves transfer matter, not energy.
False. Waves transfer energy, not matter (think of the ribbon on the rope scenario where the ribbon just moved up and down, it did not move).
Explain why you can't hear in space.
Sound needs to travel through a medium (solid, liquid, gas). In space there is no air, so you cannot hear sounds.
Translucent: window, glasses, clear water bottle
Translucent: piece of paper, tissue
Opaque: desk, table, chair
What is morse code?
It is a way to communicate that is made up of dots and dashes.
Explain two ways that you can protect your ears.
Listen to music on lower volume.
Wear ear plugs at loud events.
Limit the amount of time around loud sounds.
If you increase the frequency of a wave, would you have more or less waves?
More
What is echolocation?
Echolocation is when an animal can locate objects based on reflected sound.
Explain how light reflects off of a mirror.
If light hits straight on, it bounces off straight back. If it comes in at an angle, it bounces off at the same angle on the other side.
Decode the word below. You may use your sheet to help you. You have 30 seconds!
. ___ .___. ___
Art
This is where an image is formed in the eye
The retina
Waves are moving through a swimming pool and a toy boat is bobbing up and down. How would the boat's movement change if the WAVELENGTH of the waves were INCREASED?
The boat would bob up and down fewer times in a minute.
Explain how you hear.
A person makes a sound. That sound travels from the person's mouth in a wave, making air molecules vibrate. The sound then reflects off of an object and bounces back to a person's ear. It then enters the person's ear, where it makes the eardrum vibrate, then the information travels to the brain along the auditory nerve.
Explain why a banana is yellow.
When the light hits the banana, all colors are absorbed except for yellow, which bounces back to your eyes.
You want to send a picture to your friend. Explain how this information is digitized.
A picture or message is “encoded”. The encoded message is sent to other places using waves. Upon arrival, the encoded message is then changed back to pictures/messages (“decoded”)
Name the names of the nerves that send messages to your brain so you can see and hear.
Optic nerve & auditory nerve