Energy

Which force acts in the opposite direction of the way an object wants to slide?

• gravity
• magnetism
• friction
• buoyancy

The boy tossed the ball it fell to the ground.  Why?

• magnetism
• because of buoyancy 
• because of gravity
• because of friction

Tags

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Balanced forces......

• stay still
• light up
• move
• laugh out loud

How could you make this electromagnet pick up more paperclips?

• use a different nail
• use a different battery
• wrap more coils around the nail
• use a different copper wire

What is the power source in the picture?

• battery
• copper wire
• switch
• light

Tags

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Does the balloon and the girl's hair have......

• both have negative charges
• balloon has negative charges and the hair has positive 
• both have positive charges
• balloon has positive charges and the hair has negative

Tags

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What could be added to this picture to make the light bulb work?

• an open switch
• a closed switch
• a rubberband
• a wooden sticks

Tags

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In the sound lab, nothing touched the rice.  How did the rice move?

• electromagnetism
• magic
• sound waves
• light rays

Would this picture represent a low or high pitch sound wave?

• low
• high

Tags

NGSS.MS-PS4-1

Which of the following would sound travel through the fastest?

• water
• oxygen
• wood
• koolaid