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WorksheetsModule 4 Waves Energy and Information
Total questions: 23
Worksheet time: 17mins
Students are modeling waves by shaking a rope up and down. We know this is a wave because-
the rope is made up of strands of cotton threads which are braided together.
the rope stops moving when the students stop shaking it up and down.
it has a repeating pattern with a specific wavelength, frequency, and amplitude.
the student can change the distance the rope moves by moving the rope further up or down.
Which of the waves is carrying the greatest amount of energy?
The waves that carry the most energy are the waves that-
move into a new medium.
are closest together.
have the greatest amplitude.
move the most slowly.
This table provides simplified data on the relationship between the amplitude of a wave and the energy the wave carries.
4
16
32
80
Which of the following waves has the highest frequency?
Which of the following provides an example of sound waves being reflected?
Hearing music being played by a neighbor's stereo through a wall
Water in a glass vibrating because of the sound of thunder
A noise that produces an echo when it bounces off a distant wall
The sound of a distant train getting louder as it approaches an observer
Music studios use "soundproof" recording rooms. The walls of these rooms are designed in such a way that the only sounds that reach the microphones inside the room are sounds from inside the room. The most important characteristic in designing the soundproof room is to create walls that-
allow communication between people inside and outside the room.
reflect sounds around the room to alter their properties.
allow sounds to move easily from one place to another.
absorb sounds and prevent them from passing through.
A student places a pencil in a glass of water and observes that the pencil appears to be broken. Which of these provides the best explanation for why the pencil appears broken?
The pencil absorbs all the light rays that hit it.
Water reflects light rays away from the pencil.
Light rays are bent by the water in the glass.
The surface of the water reflects light rays.
The illustration shows the path of a laser leaving a laser pointer. At what point is the laser being absorbed?
A
B
C
D
Which of the following is the best example of an object absorbing light?
A black sweater in the sun
A clean window in the sun
A curved mirror in the sun
A long shadow in the sun
Solar panels generate electricity using photovoltaic cells that receive sunlight. To protect these cells from moisture while allowing sunlight to pass through, engineers must design a cover for the solar panel that is -
waterproof and transmits light.
very flexible and reflects light
stronger than steel and bends light.
cold to the touch and absorbs light.
Humans see different colors because our eyes are responding to light that is different in which characteristic?
Speed
Amplitude
Angle
Wavelength
A rainbow happens when sunlight passes through water droplets in the air. Which of the following best explains why?
Water droplets of different sizes filter out light of different colors.
Different chemicals in the water get energy and give off light of different colors.
Light of different colors travels at different speeds through different-sized water droplets.
Light of different wavelengths is bent at different angles.
The diagrams provided here represent two light waves. Which conclusion is supported by the data provided in the diagrams?
Light Wave #1 will appear brighter than Light Wave #2.
Light Wave #1 will be a different color than Light Wave #2.
Light Wave #1 will reflect more easily than Light Wave #2.
Light Wave #1 will travel in a straight line, but not Light Wave #2.
What is one way in which sending information by digital signals is better than sending it by analog signals?
The equipment for analog signals costs more.
Analog signals can't transmit sound information.
Analog signals suffer more interference.
The range of analog signals is only a few meters.
Fiber optics is a process that allows people to send information through pulses of light along thin wires made of glass. In order for information to be sent by fiber optic transmission, the information being sent must-
be some kind of visual information.
consist of only simple data.
travel only in a straight line.
first be converted to a digital signal.
For sound to be recorded digitally, it is sampled and turned into numbers. The numbers are stored and later converted back to sound. Why does sound recorded digitally last longer without degrading than sound recorded through analog technology?
Only ten digits are needed to record all sounds.
Digitally recorded sound takes up less space.
Numbers can be added together or subtracted.
The values of the numbers are always constant.
A Wi-Fi router is an electrical device that allows the rapid transfer of digital information between a modem and a computer.In order to do this, radio waves are used. From this we can conclude that radio waves have what properties?
They create electrical currents and travel in straight lines over infinite distances.
They are able to carry digital information and can travel through space at high speeds.
They store massive amounts of information and generate heat as they move.
They can be used to power computers and have very short wavelengths.
The characteristics of several different kinds of information technology are presented in the table. Which of the devices described above is an example of one that uses digital technology?
Record album
Clock
Cell phone
Thermometer
What is part 1. of the wave pictured.
wavelength
amplitude
frequency
What is part # 2 of the wave pictured here?
wavelength
amplitude
frequency
Of all seven forms of electromagnetic waves, we can only see _____________________________. The colors we see are the colors ___________________________ back to our eyes.
ultraviolet, reflected
ultraviolet, refracted
visible light, reflected
visible light, refracted
Why do we see rainbows?
Light is reflecting the colors of the rainbow.
Light is refracting through the water droplets.
Light is reflecting the colors we see.
Light is absorbed by the water droplets.
