U2 STAAR Review

Which procedure would most likely allow the bulbs to light?

• Connect the two wires that are attached to the wood block
• Move the switch closer in the circuit to the battery
• Switch the positions of the two wires that are connected to the battery and then open the switch
• Open the switch and then connect the two wires that are attached to the wood block

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5.6b

As the mirror changes direction, the light reaching the mirror can reach the ceiling because the light —

• travels in straight lines and reflects from the surface of the mirror
• refracts in the glass of the mirror and is spread out all over the room
• enters the mirror and changes direction when it is refracted by the back of the mirror
• travels through air and does not change its direction in air

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5.6c

Which LEDs produce light when the switch is in the position shown?

• 1
• 2
• 3
• 4
• 5

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5.6b

The students look through the side of the aquarium. They notice that the image of the tongs appears to break as the tongs enter the water. Which property of light are the students observing in this situation?

• Light is refracted as it moves from one medium to another medium.
• Light can be refracted and separated into different colors as it moves from air to a different medium.
• Light travels in a straight line and can be reflected off the surface of water.
• Light is absorbed by water and reflected off glass.

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5.6c

Which of these devices is the only one NOT designed to produce both sound and light energy?

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5.6a

Each of these activities requires the use of which kind of energy?

• Mechanical
• Thermal
• Electrical
• Sound

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5.6a

Which table best describes the behavior of the light ray as it encounters the materials?

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5.6c

A student wants to build a circuit with 4 lightbulbs and 1 bell. The student wants to place a switch in the circuit so that only 1 light will still be on and the bell will still ring when the switch is opened. Which of these circuits should the student build?

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5.6b

The photograph shows a laser cutting a sheet of metal as the laser moves from one end of the metal to the other. Four groups of students each made a table of examples of the different types of energy involved in this process. Which of these tables is correct?

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5.6a

Which two switches can be open and still allow all of the parts to work?

• 1
• 2
• 3
• 4

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5.6b