Light

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Light
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• 1. The picture shows a pencil in a container of
  water. Why does the pencil look as if it is
  broken?

• A. because the shiny glass reflects light
• B. because the water separates the light into
  many colors
• C. because the part of the pencil outside the
  water casts a shadow by the water
• D. because light rays are bent when they pass
  from air into water and from water into air

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• 2. Materials such as wood and metal do not let
  light travel through them. We cannot see through
  them at all. They are said to be

• F) invisible.
• G) opaque.
• H) translucent.
• I) transparent.

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• 3. Materials such as waxed paper and frosted
  glass make objects appear to be blurry. They are
  said to be

• A) invisible.
• B) opaque.
• C) translucent.
• D) transparent.

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• 4. When light travels through a magnifying glass,
  it bends, and we see a larger object. This
  bending of light is called

• F. reflection
• G. refraction
• H. transparent
• I. translucent

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• 5. Light can pass through some solids, liquids,
  or gases. Materials that allow light to pass
  through them clearly are called transparent.
  Identify which of the following materials is
  transparent?

• A. window glass
• B. frosted glass
• C. a mirror
• D. wax paper

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• 6. Identify which example shows light being
  reflected?

• F) using a microscope to make small objects look
  larger
• G) using a prism to show the colors of the
  spectrum
• H) using eyeglasses to see things better
• I) using a mirror to see your image

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• 7. When we see the moon due to the Suns light
  bouncing back off of its surface, this is called

• A. reflection
• B. refraction
• C. transparent
• D. translucent

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• 8. Light travels in a ___________ line.

• F) wavy
• G) bending
• H) zig zag
• I) straight

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• 9. Light is a form of ____________.

• A) brightness
• B) energy
• C) intensity
• D) magic

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• 10. The optical tool that is used to enlarge
  small objects is called

• F) a microscope.
• G) a telescope.
• H) a spectroscope.
• I) a barometer.

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• 11. Light can pass through some solids, liquids,
  or gases. Materials that allow light to pass
  through them clearly are called transparent.
  Identify which of the following materials is NOT
  transparent?

• A. window glass
• B. clean air
• C. a mirror
• D. water

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• 12. ________________ is an example of natural
  light.

• F. candles
• G. stove eye
• H. fire
• I. flashlight

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• 13 _________________ is an example of artificial
  light.

• F) lightning
• G) candles
• H) Sun
• I) lightning bug

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• 14. If light hits an opaque object, the object
  ____________, or takes in the light.

• F) reflects
• G) refracts
• H) absorbs
• I) bends

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• 15. When we see a black object, why do we see
  black?

• A. All of the colors of the spectrum are
  absorbed.
• B. All of the colors of the spectrum are
  reflected.
• C. Black is reflected off the object.
• D. Black is absorbed into the object.

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• 16. Identify which of these can be used to focus
  the rays of the sun on a very small spot creating
  a spectrum?

• F) a magnifying glass
• G) a mirror
• H) a prism
• I) a filter

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• 17. Which of the following is an example of a
  translucent material?

• A. wax paper
• B. construction paper
• C. aluminum foil
• D. glass

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• 18. Lemons look yellow because ____________.

• F. they reflect all colors of light except yellow
• G. they absorb only yellow light
• H. they absorb all sunlight
• I. they reflect only yellow light

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• 19. When light hits an opaque object such as a
  persons body, it is blocked and a shadow in the
  shape of the person forms. This shows that
  _______________.

• A. light travels in a straight line
• B. light travels from the sun in waves
• C. light bends around solid objects
• D. light travels faster through some materials
  than others

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• 20. A transparent material is best described as
  one that ___________.

• F. allows light to pass through
• G. blocks light waves
• H. allows some light to pass through
• I. is cloudy or frosted in appearance

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• 21. Light bends when __________.

• A. it moves from one material to another
• B. it passes through clear glass
• C. it strikes a mirror
• D. it moves through empty space

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• 22. Light energy that can be seen and that can
  be broken into the colors of the rainbow is
  _______________________.

• F. electricity
• G. moonlight
• H. x-rays
• I. the visible spectrum

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• 23. Which colors are missing in the list of
  colors in a rainbow red, orange, ____________,
  green, ___________, indigo, violet?

• A. pink, turquoise
• B. pink, purple
• C. yellow, blue
• D. blue, purple

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• 24. Which statement does not describe how light
  travels?

• F. Light moves in a straight line from its source
  unless it is bounced off another object
• G. Light moves faster through air than through
  water.
• H. Light travels at different speeds through
  different materials.
• I. Light travels at a slow speed.

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• 25. What happens when light hits clear glass?

• A.Some of it bounces off and some of it passes
  through
• B. All of it bounces off into a reflection
• C. Some of it is absorbed and some bounces off
• D. All of it passes through

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• 26. Glass, water, and clear plastic allow light
  to pass through them. Which word best describes
  these objects?

• F. translucent
• G. refractive
• H. transparent
• I. opaque

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• 27. Which best explains why people see grass as
  green?

• A. The pigment in the grass reflects only green
  light.
• B. The grass absorbs green light from the Sun.
• C. Green light changes direction when it hits the
  grass.
• D. The grass is opaque and does not allow green
  light through.

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• 28. Which best explains why objects can be seen?

• F. Objects reflect light
• G. Light shines on objects
• H. Objects are made of matter.
• I. Light refracts off objects.

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• 29. Which of the following best describes what
  Newton discovered about prisms?

• A. They absorb white light.
• B. They display infrared light inside.
• C. They convert light energy into waves.
• D. They split light into the visible spectrum.

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• 30. Which of the following is a true statement
  about light?

• F. It is made of only one color.
• G. It is made of many colors.
• H. It can not travel through a vacuum.
• I. It can not travel through solids.

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• 31. Which best describes what happens when light
  reaches translucent materials?

• A. All of the light passes through.
• B. Some light passes through and some bounces off
  in different directions.
• C. The light is reflected at a 90 degree angle.
• D. Some light bounces off in different
  directions, while some light is absorbed.

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• 32. Which of the following explains how
  reflection and refraction of light are similar?

• F. Both involve light bouncing
• G. Both involve light being absorbed
• H. Both involve only white light
• I. Both involve light bending

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• 33. Mrs. Brown wants to install windows in her
  office that will protect her privacy. What is the
  best material to have the windows made from?

• A. Clear plastic
• B. Clear glass
• C. Frosted glass
• D. Thin paper

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• 34. Which is the best definition of refraction?

• F. When a light wave bends as it strikes an
  object
• G. When a light wave bounces off an object
• H. When a light wave curves through a convex lens
• I. When a light wave strikes a prism

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• A. The colors people see that make up white light
• B. The colors of the rainbow
• C. The colors that come out of a prism
• D. The colors red, blue, and yellow

• 35. Which is the best definition of the visible
  spectrum?

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• 36. When the flashlight shines on a block of
  wood, the light will

• F. Pass through the wood
• G. Appear to be red
• H. Not pass through the wood
• I. Cause the wood to burn