Ch
apter
Key Idea: Light travels
in a straight line.
Vocabulary
light beam p. 97
light ray p. 97
Key Idea: Materials can be
classified as transparent,
translucent, or opaque.
Vocabulary
transparent p. 100
translucent p. 100
opaque p. 100
Key Idea: Materials can transmit, reflect, or absorb light.
Vocabulary
transmit p. 100
reflect p. 102
absorb p. 102
Translucent
Transparent
Opaque
Key Idea: Our eyes can see light.
Light travels from the source to your eye
Light
Key Idea: Light can
be refracted.
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our eye
is ref
j e c t to y
lect e
d f r o m t h e ob
Vocabulary
refract p. 107
NEL
Key Idea: Light can be
separated into colours.
Vocabulary
spectrum p. 108
prism p. 109
Beam of white light
entering prism
Prism
Review Key Ideas and Vocabulary
Use the vocabulary words in your answers to the questions.
1. How can you tell that light travels in straight lines?
Use a diagram in your answer.
2. What is a shadow and how is it formed?
3. Draw a table like the one below in your notebook.
Use pictures or words to list four transparent materials,
four translucent materials, and four opaque materials.
Transparent
Translucent
Opaque
4. Draw diagrams to show what happens when light strikes
a piece of glass, a mirror, and a piece of black rock.
5. Why are you able to see things that do not produce light?
6. Describe how you would show someone that light can be
refracted. Use a diagram in your answer.
7. What are the colours in the spectrum? (Remember to use
your mnemonic with this question!)
NEL
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