NGSS.MS-PS2-5

A hypothesis is often tested with a controlled _______

• experiment 
• observation 
• theory
• law 

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NGSS.MS-PS2-5

What do the lines around this magnet represent?

• North Pole
• South Pole
• Magnetic Declination
• Magnetic Field

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NGSS.MS-PS2-5

What is our best evidence that Earth has a magnetic field?

• All things fall toward Earth's center
• A compass needle lines up with it
• Winds blow from east to west
• Earth's oceans all have currents

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NGSS.MS-PS2-5

Water striders can walk across the surface of calm water. Their feet push the surface of the water down slightly, but they do not break the surface. Why?

• The insects are light enough so they do not break the hydrogen bonds holding the water molecules together
  
• The insects actually use their wings to hover slightly above the water’s surface and they only skim it with their feet.
• The insect’s feet are non-polar, so they are repelled by the polar water molecules and are pushed away from the water’s surface.
• The insects are small enough to see the individual water molecules, so they are able to step carefully from one molecule to the next
  

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NGSS.MS-PS2-5

Testing a hypothesis often involves a(n):

• answer
• experiment
• problem
• safety check

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NGSS.MS-PS2-5

Rubbing a balloon on hair is an example of static charge build up created by....

• conduction
• friction
• induction
• hairduction

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NGSS.MS-PS2-5

The push or pull between charged objects is an

• electric force
• electric discharge
• electric field

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NGSS.MS-PS2-5

Stephan claims that Earth has both a gravitational field and a magnetic field. Which statement best supports his claim?

• Any object will fall to the ground.

• A bar magnet will fall to the ground.

• Any object will fall to the ground, and a compass can be used for navigation.

• A compass points in the direction of both the magnetic and gravitational fields.

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NGSS.MS-PS2-5

Magnetic Force is an example of ____________ force.

• contact

• non-contact

• balanced

• unbalanced

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NGSS.MS-PS2-5

Two balloons are hanging from a stick.

Both balloons have a positive charge.

How would you expect the balloons to move?

• there would be no movement

• towards each other

• away from each other

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NGSS.MS-PS2-5