Light & Sound Vocabulary

Question 1

Which word best describes a clean glass drinking cup?

Accepted Answer

transparent

Answer

reflective

Answer

opaque

Answer

translucent

Question 2

Sam is sorting three objects for his art project. The objects are: 1. A clear drinking glass. 2. A frosted bathroom window. 3. A wooden ruler. Which statement correctly names each object as transparent, translucent, or opaque and gives a short reason?

Accepted Answer

The clear drinking glass is transparent because you can see straight through it; the frosted bathroom window is translucent because light passes through but objects look blurry; the wooden ruler is opaque because no light passes through it.

Answer

The clear drinking glass is transparent because it blocks all light; the frosted bathroom window is opaque because it lets no light through; the wooden ruler is translucent because it glows.

Answer

The clear drinking glass is translucent because it lets some light through; the frosted bathroom window is opaque because you cannot see anything through it; the wooden ruler is transparent because you can see through the wood.

Answer

The clear drinking glass is opaque because it blocks light; the frosted bathroom window is transparent because you can see through it clearly; the wooden ruler is translucent because you can see the wood grain faintly.

Question 3

Which sentence best explains why a shadow appears?

Accepted Answer

A shadow appears when an opaque object blocks the light from a light source.

Answer

A shadow appears when a transparent object lets the light pass through.

Answer

A shadow appears when the light reflects off a shiny surface.

Answer

A shadow appears because the light source moves away from the object.

Try three questions

Which word best describes a clean glass drinking cup?

Sam is sorting three objects for his art project. The objects are: 1. A clear drinking glass. 2. A frosted bathroom window. 3. A wooden ruler. Which statement correctly names each object as transparent, translucent, or opaque and gives a short reason?

Which sentence best explains why a shadow appears?

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