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Pressure

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bernad
16 diapositives · 1.3K Views · Sep 16, 2011

Pressure. Ks3 Science. Aims. Aim;. Understand the relationship between; Force Area Pressure Write detailed explanations about pressure using scientific language. . FACT AIM. SKILL AIM. Odd one out. Which is the odd one out and why?. Simple definition. Pressure;.

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  1. Pressure Ks3 Science Aims

  2. Aim; • Understand the relationship between; • Force • Area • Pressure • Write detailed explanations about pressure using scientific language. FACT AIM SKILL AIM Odd one out

  3. Which is the odd one out and why? Simple definition

  4. Pressure; • When we talk about pressure in Science we use it as a measure of the ratio of how much push or force there is acting on a given surface area. • Simply put if a girl pushes by the same amount on a desk…. • The smaller the contact area the larger the pressure is. TRY IT! Low Pressure High Pressure Literacy

  5. Pressure; • Use the writing frames in the next slides to help explain what is happening in the two pictures underneath. • Pick from the options and construct a paragraph on your sheet. Footballers boot Camels foot Describe Answers

  6. Answers Create your sentences;     

  7. Answers Create your sentences;      

  8. Pressure; • Watch the two video clips about pressure and do the same task. • This time use your own explanations using your previous examples for reference. Describe Tank v Ballerina Nettle Stings Odd one out

  9. Which is the odd one out and why? Aims

  10. Aim; • Understand the relationship between; • Force • Area • Pressure • Write detailed explanations about pressure using scientific language. FACT AIM  SKILL AIM Odd one out

  11. Sharing/ Division? • If I have an apple and share it between 2 people or 4 people I can write mathematically as; • So each person either gets a half an apple or a quarter of an apple. The more people I share it with the less apple the get each. Simple definition

  12. Pressure; • What we have done is work out a qualitative idea for pressure; “the larger the area is the lower the pressure.” • However we can describe this mathematically; Force ( N, Newton) Area (m2 or cm2) Pressure (N/m2 or N/cm2)

  13. Pressure Examples; • A person pushes on a desk with a force of 10N. The contact area of their finger is 1 cm2. A = Area (m2 or cm2) Force ( N, Newton) P = Pressure (N/m2 or N/cm2)

  14. Pressure Examples; • A person pushes on a desk with a force of 10N. The contact area of their hand is 125 cm2. A = Area (m2 or cm2) Force ( N, Newton) P = Pressure (N/m2 or N/cm2)

  15. Pressure Comparison; • We can now see the relationship numerically or quantitatively. As the area increases the pressure decreases; A = Area (m2 or cm2) Force ( N, Newton) P = Pressure (N/m2 or N/cm2)

  16. Aim; • Understand the relationship between; • Force • Area • Pressure • Write detailed explanations about pressure using scientific language. FACT AIM   SKILL AIM Odd one out