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BS 4I3 energy: Light and sound
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A toy car gets power from .............
 
batteries
 
water
 
fuel
The energy that we can hear is called ___
 
sound
 
electricity
 
light
The energy that we can see is called ___-
 
light
 
electricity
 
sound
Fireflies can make their own light. – true / false
true
Thin paper blocks all light. – true / false
false
Light bounces off objects that are rough. – true / false
false
The moon can make its own light. – True / False
False
True/False: A shadow is made when something blocks the light.
True
True/False: The engine of a car burns the gasoline so that the car can move.
True
Read and choose True/ False: Cars use gasoline for fuel.
True
Label the picture
tuba
Label the picture
sound
Look at the picture. How can you make sound using the guitar?
You can pluck the guitar strings. You hear the sound when the strings vibrate
............... means to move back and forth very fast.
 
vibrate
 
sound
Look at the picture. Use what you know about light to tell how the man can see himself in the mirror.
The man can see himself because light bounces off objects that are smoothly and shiny.
Why do people make shadow?
Light cannot pass through people.
What are three things that can make light?
Possible answers: candle, sun, star, (lamp, fireworks, firefly,...)
What is shadow?
 
forms when something blocks the light.
 
something that can cause change or do work
 
energy that makes lamps and other things work