P2

• What is a line of inquiry?

  A question scientists ask about the world
• Where does the dependent variable go to on a graph?

  y-axis
• Where does the independent variable go on a graph go?

  x-axis
• Fill in the gaps:

  (Speed, distance and time)

  A) D

  B) S

  C) T

  
• What is relative motion?

  The speed of a moving object from the viewpoint of another moving object
• What unit do we use to measure time?

  seconds
• Fill in the gaps:

  A) Steady speed

  B) Fast, steady speed

  C) Stationary

  D) Returning to the start

  E) Getting faster

  
• What unit do we use to measure distance?

  Metres
• What does it mean when it says 1m/s?

  One metre is travelled per second
• What unit do we use to measure speed?

  m/s
• If two objects move in opposite directions, how do you calculate their relative speed?

  Add their speeds to each other
• If two objects move in the same direction, how do you calculate their relative speed?

  Subtract their speeds
• What is a distance-time graph?

  A graph showing how an objects speed changes over time
• What is speed?

  How fast an object is travelling
• What is the atmosphere?

  Thin layer of gases around the Earth
• What are fluids?

  Substances that flow like liquids and gases
• State the unit of force:

  Newtons
• What is a moment?

  The turning effect of a force
• Fill in the gaps:

  A) Constant acceleration

  B) Constant speed

  C) Constant deceleration

  
• How does a simple machine help us lift heavy weights ?

  We use a smaller force over a larger distance
• The steeper the gradient in a speed-time graph, the higher the acceleration
• What is the unit of pressure?

  N/m2
• What is a speed-time graph?

  A graph showing how an objects acceleration changes over time
• State 2 ways in which pressure on a surface can be increased

  Increase the force and/or decrease the surface area
• What does a negative acceleration mean?

  The object is slowing down
• What is the turning effect of a force?

  The moment
• What is a simple machine?

  lever
• How do you calculate moment?

  Force x distance from the pivot
• What is the relationship between pressure and area?

  As the surface area increases, the pressure decreases
• What is the unit for acceleration?

  m/s2
• What is the relationship between the moment of a force and the distance from the pivot?

  As the distance from the pivot increases, the moment increases too
• What is the relationship between the moment of a force and the size of the force?

  As the size of the force increases, the moment increases too
• What causes the pressure of a liquid in a container?

  The particles/molecules hitting the side of the container
• As an object goes deeper into the water, why does the pressure on it increase?

  There is a greater weight of water pressing on the surface of the object
• What is the relationship between altitude above sea level and atmospheric pressure?

  As the altitude increase, atmospheric pressure decreases
• What is the relationship between depth of water and pressure?

  As the depth of water increases, the pressure increases too
• Why does air pressure increase as an object moves lower down in the atmosphere?

  There is a greater weight of air pressing on the surface of the object
• What is the unit for moment?


  Nm
• What is the unit for area?

  m2
• How do you calculate the acceleration from a speed-time graph?

  change in speed / change in time