Show:
Waves and Nature
Mechanical Waves
Properties of Waves
Electromagnetic Waves
Interactions of Waves
100
DAILY DOUBLE: What is a wave?
A disturbance that transfers energy from place to place.
100
What type of mechanical wave moves particles in a medium from left to right (across)? Give an example of this type of wave.
Transverse waves, example: Waving a rope
100
What are the 4 properties of waves?
Amplitude, Frequency, Wavelength, and Speed
100
Fill in the blank: Electromagnetic waves have __________ energy and ___________energy that move through space at the speed of light.
electric energy and magnetic energy
100
What are 4 ways in which waves can interact with itself or other mediums?
Reflection, Refraction, Diffraction, Interference
200
What causes "mega" ocean waves that reach several hundred feet in height?
Constructive interference
200
What type of mechanical wave causes the medium to move back and fourth? Give an example of this type of wave.
Longitudinal waves, example: a spring
200
Define amplitude. How is it measured in transverse and longitudinal waves?
The distance the medium rises away from its rest position. The farthest distance of a wave between the crest/trough and rest position (transverse) or how compressed/rarefracted the medium becomes (longitudinal).
200
DAILY DOUBLE: How does the potential energy of a chemical effect its color while burning?
Higher energy chemicals produce visible light with higher wavelengths whereas lower energy chemicals produce visible light with lower wavelengths.
200
What is reflection? Give an example.
When an object or a wave hits a surface and bounces back. Example: An Echo
300
What type of seismic wave causes the most damage?
Surface waves
300
What is a "trough" and "crest"? What type of mechanical wave can these be seen in?
a Trough is the lowest portion of a transverse wave, and a crest is the highest portion. They can be found in Transverse waves
300
DAILY DOUBLE: Define Wavelength.
The distance between two corresponding parts of a wave (crest-crest, or trough-trough).
300
What does AM and FM stand for? Explain what is changed in each.
Amplitude Modulation: Radio waves that have their amplitude changed. Frequency Modulation: Radio waves that have their frequency changed.
300
What is refraction? Give an example.
When a wave enters a new medium at an angle and changes speed unevenly, this causes the wave to bend. Example: Beam of light in air and water
400
What type of equipment is used to measure seismic waves?
Seismograph
400
What are "compressions" and "rarefactions?" What type of mechanical wave can these be found in?
Compression: Where coils are close together, Rarefractions: Where coils are far apart. Both are found in Longitudinal waves
400
Define Frequency. How is it calculated?
The number of complete waves that pass a point in a given amount of time. Measured in Hertz (waves/second).
400
List purposes for each of the following types of waves: Radio Waves: Microwaves: Infrared Rays: Visible Light: Ultraviolet Rays: X-Rays: Gamma Rays:
Radio Waves: Broadcasting (television, radio) Microwaves: Cell phones, Microwave ovens, Radar Infrared Rays: Heat lamps, Infrared cameras Visible Light: Light bulbs, all colors Ultraviolet Rays: Tanning booths X-Rays: X-ray machines for bones and teeth Gamma Rays: Cancer radiation therapy, Nuclear weapons
400
DAILY DOUBLE: What is diffraction? Give an example.
The bending and spreading out of waves bending around a barrier or passing through a hole. Example: Waves hitting a boat.
500
How are satellites used to communicate between people around the world?
Radio or Microwaves are sent to towers, which then send a signal to satellites. These satellites then direct the wave to another part of Earth where it is then received by another tower and/or communication device.
500
DAILY DOUBLE: What type of movement provides the source of energy needed to start a mechanical wave? Give an example.
Vibration. Example: An earthquake
500
How do you calculate the speed of a wave?
Speed = Wavelength x Frequency
500
In order from least to most energy, list all types of waves in the electromagnetic spectrum including the visible light spectrum!
Radio waves, Microwaves, Infrared Rays, Visible Light (ROYGBIV), Ultraviolet Rays, X-Rays, Gamma Rays
500
What is interference? What are the two types? Devine each
Interference is the interaction between two waves that meet. They can create constructive interference (higher amplitude) or destructive interference (lower amplitude).