Year 7 Science

. Any magnet has two ends, each one called a:

• A.  Magnetic field
  
• B.  Magnetic pole
  
• C.  Magnetized material
• D.  None of the above
  

A ferromagnetic material is:

• A.  A material that shows weak magnetic effects
  
• B.  A material that shows no magnetic effects
  
• C.  A material that shows strong magnetic effects
  

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A ____________ is a push or a pull on an object.

• friction
• force
• magnet
• gravity

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If these teams are pulling with the same amount of force what will happen?

• The boy in blue will win.
• They will not move at all.
• The boy in red will win.
• Both will fall down.

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Why is it harder for the boy in Image B to get down the hill?

• Motion
• Friction
• Work
• Displacement

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Ms Jo Jo rubbed two balloons with a piece of wool. What will happen when the balloons are brought near each other?

• The balloons will repel each other.
• The balloons will attract each other.
• The balloons will become positively (+) charged.
• The balloons will pop.

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Any object with mass has gravity.

• True
• Sometimes
• False
• Never

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A flat sloping surface that connects lower and higher elevations. It makes raising objects easier.  

• wedge
• screw
• lever
• inclined plane 

An inclined plane wrapped around a rod forms this simple machine 

• lever
• pulley
• screw
• wedge 

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A device that has two or more simple machines working together 

• fulcrum 
• pulley
• compound (complex) machine 
• motor