3rd Science Exam B3P1

What is energy?

• a) A type of electricity
  

• b) The capacity to perform work
  

• c) A source of light
  

• d) A machine that generates power

What happens when we remove energy from everyday life?

• • a) Everything works faster
    

• • b) Only electrical devices stop working
    

• • c) Nothing would be possible
    

• • d) Water stops boiling

Why is radiant energy important for plants?

• a) It helps plants grow taller
  

• b) It provides heat for their roots
  

• c) It is stored during photosynthesis to produce food
  

• d) It allows them to move towards the sun

Why does boiling water demonstrate thermal energy?

• a) Because the heat increases the kinetic energy of atoms and molecules
  

• b) Because it emits visible light through photons
  

• c) Because it transforms into electrical energy
  

• d) Because water does not conduct energy

What type of energy is thermal energy?

• a) A type of potential energy
  

• b) A type of kinetic energy
  

• c) A type of nuclear energy
  

• d) A type of mechanical energy

What would happen if we removed all energy from our lives?

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What happens if an object has zero velocity?

• a) It has maximum kinetic energy
  

• b) It has no kinetic energy
  

• c) It has more gravitational potential energy
  

• d) It starts moving automatically

Why does a pool ball stop moving after hitting another ball?

• a) Because the table slows it down
  

• b) Because it transfers kinetic energy to the other ball
  

• c) Because it loses gravitational energy
  

• d) Because air resistance stops it

How does kinetic energy differ from gravitational potential energy?

• a) Kinetic energy depends on movement, while gravitational potential energy depends on position
  

• b) Kinetic energy is a type of potential energy
  

• c) Gravitational potential energy increases as velocity increases
  

• d) They are both measured the same way

Why can kinetic energy be transferred but not gravitational potential energy?

• a) Because kinetic energy involves motion, while gravitational potential energy involves position
  

• b) Because gravity only acts on moving objects
  

• c) Because objects with potential energy never move
  

• d) Because potential energy only exists in space