Homework: 5



Classwork: 5.6C Light Energy

1. What happens when light hits an object that it cannot pass through?

A. The light is reflected or absorbed

B. The light is refracted or absorbed

C. The light is reflected or refracted

D. The light is scattered or curved

2. Sometimes it is possible to see light rays. An example is when sunlight is breaking through the clouds. Sunlight breaking through clouds demonstrates how light rays travel --

A. straight lines

B. curved rays

C. zigzag rays

D. circular waves

3. Students were performing an investigation to compare and contrast the effects of reflection and refraction. What tools are most helpful to students when conducting this investigation?

A. magnets and mirrors

B. prisms and hand lenses

C. hand lenses and cameras

D. mirrors and prisms

4. Students performed an experiment testing refraction of objects in water. First, they recorded how objects looked in hot water. Then they used cold water to test if the appearance changed. What variable did students test in this experiment?

A. Temperature of the water

B. The students who performed the

experiment

C. Time of day the experiment was

performed

D. The objects tested.

5. Which of the following objects does NOT reflect light?

A. a mirror

B. a white car

C. a black shirt

D. aluminum foil

Use the table below and your knowledge of science to answer the following question.

|Transparent |Translucent |Opaque |

|Sealable bag |Wax paper |Wood |

|Drinking glass |Shower |Aluminum foil |

| |curtain | |

6. When light hits different types of objects, it acts differently depending on the object. Which object above best reflects light?

A. sealable bag

B. shower curtain

C. Aluminum foil

D. drinking glass

7. After an experiment testing refraction of light in water, a student made the following conclusion.

Objects look broken when they are in water so light is reflected in water.

Was the student's conclusion accurate?

A. Yes, because when objects appear

broken in water, they are reflected.

B. Yes, because all objects can reflect

light.

C. No, because objects submerged in

water do not appear broken.

D. No, because objects appear broken in

water due to refraction of light.

8. Light travels into a camera lens to form a small upside down image on the inside of the camera. Which of the following best describes why the lens flips and decreases the size of the image?

A. light is refracted by the lens

B. light is absorbed by the lens

C. light is reflected by the lens

D. Light is transmitted by the lens

9. What is the difference between refraction and reflection?

A. Light bends when it is reflected and

bounces off when it is refracted.

B. Light bounces off when it is reflected

and bends when it is refracted.

C. Light travels in curved lines when is

reflected and straight lines when it is

refracted.

D. When light is refracted, it no longer

travels.

10. What happens when light strikes a dark heavy object?

A. Light is refracted.

B. The light moves quickly through the

medium.

C. Light energy is absorbed.

D. Light does not strike dark objects.

11. Before beginning an experiment, students were instructed to gather the materials necessary to classify objects with the properties of reflection or refraction. What objects could be used as materials that reflect light?

A. glass, water, and camera

B. water, piece of wood, and clear

plastic container

C. DVD, shiny pot, and mirror

D. Mirror, wood, and water

12. Which science tool could be used to reflect light?

A. C

[pic]

B. D

[pic]

CER Problem

13. The diagram shows a periscope used to see objects that are behind or under a barrier. What makes it possible to see an object when looking through a periscope?

Claim: ____________________ makes is possible to see an object when looking through a periscope.

Evidence: The definition of _______________ is the bouncing of light. _________________ allow light to be reflected.

Reasoning: The ____________________ has 2 mirrors. This means that light will _______________________ off of one _______________________ to the 2nd mirror. ______________________ will bounce off the 2nd mirror into a person’s eye. This double _______________________ allows a person to see behind or under barriers.

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Word Bank: bounce light mirror periscope reflection

Word Bank: bounce light mirror periscope reflection

Word Bank: bounce

light mirror

periscope reflection

Word Bank: bounce light mirror periscope reflection

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