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Light and shadows
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Find 2 transparent objects around you.
NOICE
Find 2 opaque objects around you.
good job!
shadows can have colors (true or false)
 
false
 
true
a ... is formed when the light is blocked by an object.
shadow
If we hold a book in the torchlight, we will see a SHADOW OF A PENCIL on the paper.
 
false
 
true
Our shadows disappear when we move. (true or false)
 
true
 
false
A torch is a light source. (true or false)
 
true
 
false
All light come from a light source. (true or false)
 
true
 
false
Is the moon a light source?
No, it isn't
Is a wall opaque or transparent?
Opaque
Is a glass transparent or opaque?
transparent
It is daytime and you look behind you. You see your shadow. Now it is nighttime and when you look behind yourself you DON'T see your shadow. Why?
You need a light source to see a shadow.
Look at the picture. Why does the tree make a shadow?
The tree is opaque and it blocks the light.
What is our main source of light?
Sun
What makes a shadow?
Something blocks the light
Why we can not see in the dark?
Because there is no light
Mention 5 sources of light!
Sun, lamp, candle, torch, stars
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