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Third Grade (Grade 3) Mechanics Questions

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Grade 3 Energy and Momentum
Energy that is moving matter like jumping in a pool is called                  .
  1. mechanical energy
  2. stored energy
  3. energy of motion
Grade 3 Forces and Motion
Newton's second law states that force is equal to        mass       times acceleration.
Grade 3 Energy and Momentum
The energy of motion of the tiny particles. An example would be hot water. It is called                .
  1. sound
  2. light
  3. heat
Grade 3 Forces and Motion
The force that pulls two objects toward each other is called                .
  1. force
  2. gravity
  3. setting
Grade 3 Energy and Momentum
Energy in matter that can cause that matter to move or change is called                 .
An example would be standing still by the diving board.
  1. energy of motion
  2. stored energy
  3. chemical energy
Grade 3 Forces and Motion
A person stretching a phone cord

Force:        pull       
Applying Force:          person         
Receiving Force:              phone cord             
Effect on Object Receiving Force:                            phone cord changes shape                           
Grade 3 Forces and Motion
A ball is lying on the floor. When will the ball move?
  1. It will never move.
  2. When a force acts on it.
  3. When gravity pulls it.
  4. When the lights are turned on.
Grade 3 Fluid Mechanics
Buoyancy is
  1. sinking when put in a fluid.
  2. the ability to float in fluid.
  3. how much something shines.
  4. how much volume something has.
Grade 3 Forces and Motion
A change in an object's position is called          motion         .
Grade 3 Forces and Motion
What do these parts on the accordion do and what type of force is used for each part (compression or tension)?

keys:                                               control what note is played and compression                                              

bellows:                              control volume and tension                             
Grade 3 Forces and Motion
How fast or slow an object is moving is its         speed        .
Grade 3 Forces and Motion
What is compression?

                                                                Compression forces crush a material by squeezing it together.                                                                
Grade 3 Forces and Motion
How much you weigh depends on what force?
  1. gravity
  2. push/pull
  3. weight scale
Grade 3 Forces and Motion
What is the relationship between volume and the force of push or pull you apply to the instrument?
                                                 the more force you exert the louder the volume                                                 
Grade 3 Forces and Motion
What are some ways you can increase the motion of an object?
Grade 3 Forces and Motion
When you drop a ball with a parachute attached to it, it goes slowly to the ground. Which forces are acting on it AND which force is stronger?
Grade 3 Energy and Momentum
Sources of                stored energy                include batteries, food, and fuel, like candle wax.
Grade 3 Energy and Momentum
When you use a force to move an object, you do        work       .
Grade 3 Forces and Motion
Draw and label an object that you push or pull.
Grade 3 Energy and Momentum
When you use a force to move an object, you do        work       .
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