Muscles pull on bones but they cannot push. They work together in pairs of antagonistic muscles. Tendons join muscles to bone and ligaments hold bones together.

http://www.arrowvale.worcs.sch.uk/sportscollege/muscles.htm

These materials contain one substance ( the disperse phase) spread throughout another ( the continuous phase) .

Examples are:

• Gels ( a liquid in a solid)
• Emulsions ( a liquid in a liquid)
• aerosols ( a liquid in a gas)
• foams ( a gas in a liquid)

http://en.wikipedia.org/wiki/Colloid

How much exercise will you need to do to burn off the energy in a kit kat?

There are 1102 kJ in a bar of Britains’ best selling chocolate.

That is 1,102,000 Joules of energy.

We worked out how many joules of energy we used to do squats for one minute.

We multiplied our weight ( in Newtons) by the distance from floor to hip ( in metres) by the number of squats in one minute. This was the energy we used in one minute.

If we divide 1102000 by our energy in one minute we can work out how many minutes of exercise it would take to burn the energy!

Jesse worked out it would take him 27 minutes, but most other people would take longer than Jesse. Why?

http://www.divshare.com/download/2264638-46a

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