Water resistance: plan | Science | Quizalize & Oak National Academy

Starter quiz

______ is the force which acts between a moving sledge and the snow, in the opposite direction to the movement.
- 'Friction' ✓
Long thin shapes have less air ______ because there is less area for air to bump into.
- 'resistance' ✓
What is the surface area of an object?
- The area of its smallest surface.
- The total area taken up by all of its surfaces added together. ✓
Match the object shape to the relative size of its surface area:
- long and wide
  
  ⇔
  
  large surface area ✓
- long and thin
  
  ⇔
  
  small surface area ✓
These shapes are all made with the same mass of sticky tack. Which one of them has the greatest surface area?
- a
- b
- c ✓
If you want to fall through the air as slowly as possible you should __________ your surface area.
- maximise ✓
- minimise

Which of these is not a liquid at room temperature?
- water
- air ✓
- milk
- oil
______ is a force which acts to slow down or stop objects that are moving through liquid.
- 'Water resistance' ✓
Scientists plan tests and control ______ to investigate water resistance.
- 'variables' ✓
Why might scientists ask questions about water resistance?
- To help them understand how cars move on different surfaces.
- To help them understand how planes move in the air.
- To help them understand how boats move in water. ✓
Water resistance acts in the ______ direction to the moving object.
- 'opposite' ✓
What type of force is water resistance?
- magnetic
- friction ✓
- gravitational
- tension

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Water Resistance is a force which acts to slow down or stop objects that are moving through liquid.
Water resistance acts in the opposite direction to a moving object.
Scientists ask questions about water resistance to help them to find out more about it.
Scientists control variables and plan tests to investigate water resistance.

All objects experience the same amount of water resistance, regardless of their size or shape.

Discussion and explicit teaching. The investigation they plan will, in the next lesson, show them that this is not true.

Force - A force is a push or a pull. Forces can make objects change speed, change direction or change shape.
Water resistance - Water resistance is a type of friction force which acts between a liquid and the surface of an object.
Comparative test investigation - In a comparative test, the thing that is being changed has labels, such as the types of materials.
Variables - A variable is something that can be changed, measured or kept the same in an investigation.