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100
100
Which vocabulary word matches the picture?
transparent frosted scatter
frosted
100
Which vocabulary word matches the picture?
goggles visor block
visor
100
Which vocabulary word matches the picture?
scatter translucent shadow
shadow
100
Which of these materials is opaque or transparent?
Glass and plastic are transparent. The cotton, wood and leaf are opaque.
100
Which glass is transparent and which is translucent?
A is transparent and B is translucent.
200
this is where light comes from; some examples are a streetlight, the light in the classroom and the Sun
light source
200
an object that light cannot pass through; some examples are mirrors, rocks and people
opaque
200
a darker area caused when light cannot pass through an object; it has no details like eyes or a mouth
shadow
200
This word means something is stopped from passing through.
block(ed)
200
a material that lets light through; we can see things clearly through them
transparent
200
a material which *scatters light
*scatters means to send in different directions
translucent
300
Name 3 transparent objects
glass window, drinking glass, and glasses
300
A snowboarder needs very dark goggles. The goggles need to be a little opaque.
Why do the goggles need to be a little opaque?
BONUS - Why should the goggles not be too opaque?
The goggles need to be a little opaque to stop some of the bright light.
BONUS - The goggles should not be too opaque because they need to let some light through so that the person can see.
300
True or False. If false, say why.
A clear glass window is an example of an opaque material.
False - glass is transparent
300
True or False. If false, say why.
Shadows change size depending on the position of the light source.
True
300
A _____ is made when light is blocked by an _____ object.
A shadow is made when light is blocked by an opaque object.
300
Name 5 opaque objects
trees, people, books, wooden desks, dogs
400
Draw Kamal's shadow at 5 o'clock when the Sun is lower in the sky. 
Kamal’s shadow at 5pm should be longer and stretching down to the left.
400
When is it good for glass to be translucent and not transparent? Give one example.
It is good for glass to be translucent in the bathroom so the person in the shower can have privacy.
400
What is wrong with these shadows?
The bicycle's shadows are solid and should have gaps with light for the wheels. The seat and handlebars are in the wrong place. The girl's shadow should not be in color. The tree's shadow should point away from the Sun.
400
Mia has two shadows. Why is this?
BONUS - If Mia moves, how might the shadows change?
Mia has two shadows because she is close to two different light sources. The light from each is blocked forming two shadows.
BONUS - If she moves towards a light source, one shadow may get smaller and the other bigger. The shadows may also change shape.
400
Why are these shadows so long?
The shadows are long because the Sun is low in the sky.
400
True or False. If false, say why.
A translucent window lets you see through it as clearly as a transparent one.
False - translucent materials scatter light and you cannot see through them clearly
500
Clean water is a transparent material. We can see things clearly through it. Some water is opaque and some is transparent. How might transparent water become opaque?
Transparent water might become opaque if you add something to make it dirty, such as mud, paint or ink.
500
The closer to the light source the ball is, the ______ the shadow will be. Why is this?
The closer to the light source the ball is, the bigger the shadow will be. This is because the ball blocks more of the light.
500
Why don't astronauts were sunglasses inside their helmets?
Astronauts don't wear sunglasses inside their helmets because the sunglasses could fall off.
500
If you wore an astronaut's visor in class, how would the room look?
If you wore an astronaut's visor in class, the room would look very dark.
500
The further away from the light source the ball is, the _____ the shadow will be. Why is this?
The further away from the light source the ball is, the smaller the shadow will be. This is because the ball blocks less of the light.
500
A friend says, “Translucent materials are a source of light”. How would you explain what translucent materials really are?
BONUS - Draw a diagram explaining your answer.
Translucent materials are not a source of light. Translucent materials scatter light.
BONUS - 