Memory Anchor:

• Super Challenge:

  Stretch:

  Challenge:

Key Questions:

1. What is pressure in fluids caused by?
   • Pressure in fluids is caused by the collision of Particles on the surface of an object.
2. What is the magnitude of the pressure in liquids equal to?
   • The magnitude of the pressure in liquids is equal to the weight of water above the object.
3. What happens to the pressure in liquids when depth is increased?
   • The pressure in liquids increases with depth.
4. What is the relationship between the upthrust force and the weight of the water?
   • The size of the upthrust Force is equal to the weight of the water displaced by the object.
5. To what point will an object sink to?
   • An object will sink until enough water is displaced to produce an upthrust to balance it's weight.
6. What causes an object to sink?
   • If the weight of the object is greater than the upthrust produced the object will sink.
7. What causes an object to float?
   • If the weight of the object is equal to the upthrust produced the object will float.
8. What is the density of water equal to?
   • The density of water is 1kg/l = 1g/ml
9. What effect do objects that are less dense than water have on the water?
   • Objects which are less dense than water will displace a greater weight of water than they have. Therefore they will float.
10. What effect do objects that are more dense than water have on water?
    • Objects which are more dense than water will displace a smaller weight of water than they have. Therefore they will sink.