1. Question: Why do camels have big feet?

2. Pressure
Aim: To investigate how much pressure our feet exert on the ground.
Method:
Use graph paper to measure the area (cm2) of one foot.
Multiply by 2.
Convert the area into m2 (divide by )
Calculate your weight in Newtons (F = m.g).
Divide your weight (N) by the area of both feet (m2).

3. Pressure equation and units
Pressure is a measure of how much force is applied over a certain area.
Pressure = Force (N) / Area (m2)
Units N/m2
1 N/m2 = 1Pa (pascal)
Task: Draw a triangle to show the relationship between force, area and pressure.

4. Reducing pressure

5. Air pressure Aim: To observe the effect and strength of air pressure.
Method:
Fill an aluminium can with 1cm of water.
Boil water over bunsen.
Tip upside-down in ice cold tub of water.

6. Atmospheric pressure 1 atmosphere = 101.3kPa About 100,000 N/ m2.
Equates to 10,000 kg/m2.

7. Water pressure What happens when diving suits loose pressure?

8. Deep sea fish are able to cope with high pressure
Deep sea fish are able to cope with high pressure. Task: Find out what the pressure is at a depth of 3000m where Hairy Angler fish live.