WorksheetsWaves Unit Review
Total questions: 26
Worksheet time: 48mins
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A boat floats freely on the ocean. Waves, moving as shown in the illustration, pass by the boat.
How will the boat move?
Up and down
Closer to shore
Farther out to sea
Along the line of the shore
Students want to study how water waves move in their classroom. Which of the following is the most important feature in the design of their investigation?
Getting salt to dissolve in water
Always using the same amount of water
Making water move in regular patterns
Building scale models of boats
The diagram shows how a water wave is moving. One wave passes every 2 seconds. If a particle of water starts at the point represented in the illustration by A, where will the particle be after 4 seconds?
A
B
C
D
Water waves are able to carry objects in the direction they are moving only _________________________________________.
if the waves are very large.
if the object is very light.
where the water meets the beach.
where the water is the deepest.
Students float a cork in some water and make waves in water. Students can measure one part of the wave by measuring what?
How much the cork weighs when dry
The volume of the cork in millimeters
How far the cork moves up and down
The amount of time before the cork sinks
Two students hold two ends of a rope. Student 1 holds one end still while Student 2 moves the other end of the rope up and down at a constant rate. The students can increase the wavelength of the wave in the rope if _____.
They replace the rope with a longer one.
Student 2 moves the rope a shorter distance.
Student 1 move the other end of the rope.
Student 2 moves the end of the rope more slowly.
Which of these waves have the greatest amplitude?
When comparing two waves, the wave with the greatest wavelength is the one that has -
the greatest height.
the greatest speed.
the most space between crests.
traveled the longest distance.
Students are using an electric fan to blow air over a pan of water to create waves in a pan. They record their observations in a data table. Which of the following can be concluded based on the student’s observations?
The wavelength was affected by the speed of the moving air.
The amplitude of a wave has an affect on its wavelength.
Waves with a greater wavelength have a smaller amplitude.
Air that moves more slowly produces waves with a lower amplitude.
Two students hold two ends of a rope. Student 1 moves the other end of the rope up and down in at a constant rate while Student 2 holds one end still.
The students can increase the amplitude of the wave in the rope if -
student 1 moves the end of the rope more quickly
student 1 and student 2 move farther apart
student 1 moves the rope a greater distance
they replace the rope with a longer rope
This illustration shows the relative positions of a light source, an apple, a piece of paper, and a person. Which of the following best explains why the person shown is not able to see the apple?
Light cannot reach the apple to reflect off of its surface.
The light reflected off of the apple cannot reach the person’s eyes.
An object can be seen when light -
passes completely through the object without stopping.
reflected from the object reaches the eye.
This illustration shows the relative positions of the Sun, a tree, and a child. In order for the child to be able to see the tree, light from the sun must pass through which points?
W and Y
X and Y
W and X
Y and Z
Which is an observation that supports the idea that light is needed in order to see objects?
very bright lights can be harmful to a person's eye
objects appear different in different colored lights
objects continue to exist, even when no light reaches them
people are not able to see any objects in a room that has not light
An object can be seen when light____________________.
passes completely through the object without stopping.
reflected from the object reaches the eye.
can enter the eye from all directions at the same time.
is able to reach an object without being seen.
The picture is an example of which of the following?
reflection
refraction
absorption
transmission
This table provides information on four different systems for transferring information digitally over distances. If a system is needed that can send images over a distance of two kilometers and costs less than $12,000, which system would be the best choice?
System A
System B
System C
System D
Which of the following is the best source of information on how building cell phone towers affects the environment?
Getting information from people on how much they use their cell phones every day
Collecting data on the number of endangered species that live in areas with a cell phone tower
Studying the plants and animals in an area before and after a cell phone tower is built there
Checking the health of vegetation in areas that have never been exposed to cell phone signals
Cell phones turn a voice into a digital signal that can be transmitted. In order to get the original message, the person receiving this digital signal must have a device with which characteristic?
The same keyboard as the cell phone that sent the message
The ability to decode the digital signal back into sound
A size that makes it easy to fit into a pocket or purse
A battery that can run electronics for more than six hours
Fire outposts are used in the mountains of Colorado to watch for forest fires. Fire outposts have emergency supplies, including a cell tower, flashlights, and a telegraph machine.
When they try to call the ranger's station, their call won't go through. The cell phone tower has been damaged.
A. Using the supplies they have at the fire outpost, which type of communication would be best in this situation?
B. Provide evidence to support your choice.
C. Why would you not choose the other types of communication?
