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## PowerPoint Slideshow about 'pressure' - bernad

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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;

- 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

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

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

Aim;

- Understand the relationship between;
- Force
- Area
- Pressure
- Write detailed explanations about pressure using scientific language.

FACT AIM

SKILL AIM

Odd one out

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

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)

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)

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)

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)

Aim;

- Understand the relationship between;
- Force
- Area
- Pressure
- Write detailed explanations about pressure using scientific language.

FACT AIM

SKILL AIM

Odd one out

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