Worked example
Light passes through clear glass and a picture behind it is visible. What does this show?
Answer & why
Answer: The glass transmits light.
Passing light through a material is transmission.
Grade 3 · Science
Reason about light and materials
Use observations to describe transmission, blocking and reflection of light.
8 authored questions + worked example
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All questions
All 8 authored questions for this skill.
Question 1
An object moves between a lamp and a wall. The wall's dark shape moves too. What caused the dark shape?
- absorption only
- a shadow
- The glass transmits light.
- blocked light
A hint
Trace whether light passes through, is blocked or changes direction from a surface.
Answer & why
Answer: blocked light
The object prevents some lamp light from reaching the wall.
Question 2
A polished surface redirects a beam. What process is observed?
- opaque
- a shadow
- reflection
- The glass transmits light.
A hint
Trace whether light passes through, is blocked or changes direction from a surface.
Answer & why
Answer: reflection
The beam's change of direction at the surface is reflection.
Question 3
Light passes through clear glass and a picture behind it is visible. What does this show?
- The glass transmits light.
- opaque
- a shadow
- reflection
A hint
Trace whether light passes through, is blocked or changes direction from a surface.
Answer & why
Answer: The glass transmits light.
Passing light through a material is transmission.
Question 4
A book blocks a lamp's light and a dark region appears behind it. What is that region?
- opaque
- translucent
- a shadow
- reflection
A hint
Trace whether light passes through, is blocked or changes direction from a surface.
Answer & why
Answer: a shadow
A shadow forms where the object blocks light.
Question 5
A mirror sends light toward a wall. Which behavior is described?
- opaque
- light
- translucent
- reflection
A hint
Trace whether light passes through, is blocked or changes direction from a surface.
Answer & why
Answer: reflection
Reflection is light changing direction at a surface.
Question 6
No light passes through a tested board. How is this board described?
- light
- opaque
- translucent
- blocked light
A hint
Trace whether light passes through, is blocked or changes direction from a surface.
Answer & why
Answer: opaque
An opaque material does not transmit light through it.
Question 7
Some light passes through frosted material, but a clear image cannot be seen. Which description fits?
- light
- translucent
- blocked light
- absorption only
A hint
Trace whether light passes through, is blocked or changes direction from a surface.
Answer & why
Answer: translucent
Translucent material transmits scattered light without a clear image.
Question 8
A transparent screen lets the lamp illuminate a card behind it. What passed through?
- light
- blocked light
- absorption only
- The glass transmits light.
A hint
Trace whether light passes through, is blocked or changes direction from a surface.
Answer & why
Answer: light
The observation states that the lamp's light reached the card.