Physical science review

In tropical locations, the roofs of homes are often painted white to prevent the temperatures inside the home from getting too hot. Which statement explains how white roofs keep the temperatures lower inside homes?

• The white paint reflects the sunlight.
• Sunlight refracts through the white paint.
• Sunlight is absorbed and trapped in the white paint.
• The white paint allows sunlight to travel through the roof.

A student views an object in a mirror. Choose the diagram that shows the correct way how light travels from the object to the student's eye.

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• vibration
• reflection
• refraction
• absorption

A teacher has a car sun shade that is supposed to be placed behind his windshield to keep the inside of his car cool in the summer. The sun shade is shiny on one side and black on the other side. Which statement explains how the sun shade should be positioned to keep the car coolest?

• The shiny side should be facing outward so that sunlight will reflect off the sun shade.
• The black side should be facing outward to absorb the sunlight shining on the sun shade.
• The shiny side should be facing outward to absorb the sunlight shining on the sun shade.
• The black side should be facing outward so that sunlight will be reflected off the sun shade.

A laser is pointed at a surface of water. The initial direction of the light leaving the laser is shown. At which point will the direction of the light change?

• point W
• point X
• point Y
• point Z

Which diagram correctly shows the reflection of light from a smooth, flat mirror?

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Several students are trying to determine which material would be best to use to cover the outside of the classroom windows so the sun does not heat up the room. They shine a beam of light at different materials and they record the path of the light for each material. Which diagram shows the material they should use on the classroom windows?

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A student wants to set up a demonstration to show how white light can be refracted. Which tool should be placed inside the blank box that correctly sets up a white light refraction demonstration?

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A student places a straw into a glass of water. He notices that the straw appears to be split into two pieces. Describe how the light interacts with water to make the straw appear to be split into two pieces. Type your answer in the space provided.

A student designs a method to increase the temperature of water in a glass. Which cup will absorb the most heat?

• Blue Cup
• Green Cup
• Black Cup
• White Cup
• Red Cup