P11 - Pressure

(Set 1 only)

Independent learning

Introduction

Air pressure acts on surfaces due to the collision of air molecules with that surface. In this unit you will learn how to calculate the pressure acting on a surface and in fluids, there is a reason your ears pop on aeroplanes and when you dive deep underwater. We will cover how pressure is related to depth and also the density of fluids and the implications this has on floating objects, such as ships.

Specification links:

Task 1: Know

Task 1a: Use look, cover, write check to learn the answers to the core questions and the keywords for this topic.

P11 Knowledge Organiser - HCS

Task 1b: Listen to the podcast to get an overview of this topic:

Learn

Task 2: Pressure and Surfaces

Task 2a: Read through the slides and the BBC bitesize page:

Lesson 1 - Pressure and Surfaces - Default

Task 2b: Make notes that:

  • Define pressure

  • Give the equation to calculate pressure and Give the unit.

  • Define the unit of pressure

  • Explain why it is possible to lie on a bed of nails without injury.

Task 2c: Complete these questions (answers are on slide 18)

Task 2d: Complete the exam questions

Task 3: Pressure in a liquid at rest

Task 3a: Watch the 2 videos:

Task 3b: Read through the slides and the BBC Bitesize pages

Lesson 2 - Pressure in a liquid - Default

Task 3c: Make notes that:

  • Explain how pressure is related to depth,

    • Copy and Label the diagram below to help your explanation.

  • Give the equation to calculate the pressure in a column of liquid

  • Explain why liquids flow - Draw a diagram as part of your answer.

  • Draw a labelled diagram of a manometer

  • Explain how a manometer can be used to measure gap pressure.

Task 3d: Work through the questions on slides 17 and 18.

Task 3e: Complete the Checkpoint Quiz

Task 4: Atmospheric Pressure

Task 4a: Watch the video

Task 4b: Read through the slides and the BBC Bitesize page

Lesson 3 - Atmospheric Pressure - Default

Task 4c: Make notes that:

  • Explain what causes atmospheric pressure, include a diagram.

  • Explain why the marshmallows expand in this video

  • Explain why the water boils in this video

  • Explain why the Magdeburg hemisphere can’t be pulled apart in this video

  • Explain how we use atmospheric pressure to move liquids up through a straw - include a diagram

Task 4d: Answer the questions (answers on slide 22)

Task 4e: Complete and mark the exam question

Task 5: Upthrust and Flotation

Task 5a: Watch the video

Task 5b: Read through the slides

Lesson 4, Upthrust and Flotation - Default

Task 5c: Make notes that:

  • Explain why helium balloons and hot air balloons float.

  • Define upthrust

  • Draw a diagram showing the relative size forces acting on a submerged object and the effect this will have.

  • Describe the conditions needed for an object to float.

  • Describe the conditions needed for an object to sink.

Task 5d: Answer the questions (answers on slide 20)

Task 5e: Complete the BBC Bitesize Quiz

Task 6: Summary

Task 6a: Watch the video:

Task 6b: Complete the Seneca task:

Task 6c: Make a mind map or single page revision summary of this topic. Use the specification links to help you.

Task 7: Check

Complete the quiz, ensuring you achieve the pass mark, to check your understanding of this unit.

Extend