GRADE 4 Natural Science Revision

Sound happens when somethings....

• has electricity

• has gravity

• vibrates

Sound is a form of? 

• energy
• pitch
• volume

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Measure of how high or low a sound is

• amplitude
• compression
• speed of sound
• pitch

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An object that does not vibrate cannot produce

• sound
• light
• heat
• electricity

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What is volume?

• how high or low a sound is

• the loudness or softness of a sound

• the number of vibrations per second

• vibrations

What is the definition of Noise Pollution?

• Unwanted noise

• Excess noise produced by humans

• Unwanted noise that distrubs all life

Which answer is a "man made" noise pollution?

• Television

• Storms

• High School Field Trips

• Pet Store

Which of these is considered pollution?

• Yelling loudly to the person next to you
• Using your indoor voice when you talk 
• Walking to school

What is gravity?

• A force
• Energy
• A push
• All of them

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Without gravity we would________. 

• Float away
• Stay in the ground
• Nothing would happen.
• I don't know

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