Study

week 25 session 3

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  • true or false: Small planets have bigger gravity than big planet
    false
  • true or false: Magnet has an invisible force called magnetism.
    true
  • Give reasons for : Gravity of Earth Is greater than gravity of the moon.
    Because the mass of Earth is greater than the mass of the moon
  • Give reasons for : The ball changes its direction after we throw it upwards.
    Because gravity force always pull it downwards.
  • The force of attraction that changes the direction of a moving object in air towards the ground.
    Gravity
  • true or false: Force is the reason of motion of any body
    true
  • Give reasons for : Paper clips are pulled toward the magnet
    Due to the force of magnetism
  • The pulling force that causes object to fall down toward Earth's surface.
    Gravity of Earth
  • true or false: Planets revolve around the Sun in fixed orbits due to the effect of gravity.
    true
  • What happens if ... There is no gravity on Earth.
    AII objects on its surface will float off into space
  • true or false:Gravity affects only on the moving objects but doesn't affect the objects at rest.
    false
  • The force that is found between two magnets or between the magnet and an object.
    Magnetism
  • What happens if ... You squeeze a spring then leave it free.
    The spring will be pushed back when you leave it free
  • The effect that pull or push an object to make it move.
    Force
  • true or false: The force of magnet is always attraction force only.
    false
  • true or false: Gravity is attraction or repulsion force between two objects.
    false
  • true or false: The change of an object position is called force.
    false
  • true or false:The moon stay in fixed orbit around Earth due to the gravity between them.
    true
  • true or false: After leaving a squeezed spring, it has no force to return back to its original state.
    false
  • true or false: Gravity Is similar to magnetism because both of them has only pulling force.
    false
  • The change of an object position related to another object.
    Motion
  • true or false: Magnet must touch objects to attract them.
    false
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