New GCSE AQA Physics lesson on ’ Pressure in Liquids’ written in line with new AQA Physics specification. All questions provided with answers within power point.
The lesson starts with a question on the dangers presented to deep sea divers.
How liquids exert a pressure is demonstrated with a visual of a series of containers with different heights of liquid inside whilst highlighting the liquid has mass and therefore weight - this is then linked back to pressure = force/area.
The importance of height in relation to pressure is further reviewed with a water bottle that has holes at different heights - the water jets shooting out is then discussed.
Finally reviewing the importance of density to mass to weight and therefore pressure leads to the formation of the equation, P= ρgh - practice of the use of the equation is provided by looking at the pressure beneath the sea at different depths.
The dangers of deep sea scuba diving are again discussed with the lesson knowledge gained.
The lesson is concluded with a set of review question.
Lesson Objectives:
- Explain how a liquid exerts a pressure.
- Explain how pressure exerted by a liquid can be increased.
- Explain how pressure varies at different points in liquid.
- Calculate the pressure in a liquid column.
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