Science Test Unit's 1 & 2

• Two objects with electric charges always attract each other.
• Two objects cannot become electrically charges when they interact.
• An object with a positive chare and an object with a negative charge attract each other.
• An object with a positive charge can become negatively charged when it interacts with another object.

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NGSS.MS-PS2-3

NGSS.MS-PS2-5

Two balloons have electric charges. Which statement is true?

• Balloon Y has a negative charge and balloon Z has a negative charge. They will repel each other.
• Balloon Y has a positive charge and balloon Z has a positive charge. The will repel each other
• Balloon Y has a positive charge and balloon Z has a negative charge. They will attract each other
• Balloon Y has a negative charge and balloon Z has a positive charge. They will attract each other.

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NGSS.MS-PS2-3

Which of the following is a tension force?

• Pulling a rubber band apart
• Sliding your feet on the floor
• Gravity pulling your down
• Magnetism attracting to iron

• The south pole of the magnet he is holding should face the south pole of the magnet attached to the car
• The north pole of the magnet he is holding should face the south pole of the magnet attached to the car

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NGSS.MS-PS2-2

NGSS.MS-PS2-3

NGSS.MS-PS2-5

Which force makes it hard to ride a bike on grass?

• Motion
• Friction
• Magnetism
• Speed

Lia and Nick are pushing opposite sides of a box, and the box moves toward Nick. Why?

• They are applying no force
• Nick is applying more force
• Lia is applying more force
• They are applying the same amount of force

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NGSS.MS-PS2-1

NGSS.MS-PS2-2

• Moving all the objects to another location
• Ordering the objects by mass
• Sorting the iron and steel objects from the pile
• Counting the number of objects in the pile

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NGSS.MS-PS2-3

NGSS.MS-PS2-5

The pull of gravity affects and object's...

• Weight
• Mass
• Friction
• Magnetism

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NGSS.MS-PS2-4

True or false: Magnetism is a noncontact force.

• True
• False

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NGSS.MS-PS2-3

NGSS.MS-PS2-5

Two boys with the same mass are pulling on a rope from opposite sides with the same amount of force. What will happen to the motion of the rope? Explain.

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NGSS.MS-PS2-1

NGSS.MS-PS2-2