energy
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PowerPoint 152. Energy. Sources of Energy. Energy. Food is the body’s source of energy. Food provides energy. We need energy to grow, be active and maintain health. Different types of food provide different amounts of energy. Energy is measured in kilojoules – kJ. - PowerPoint PPT PresentationTRANSCRIPT
© Food – a fact of life 2008
Energy
PowerPoint 152
© Food – a fact of life 2008
Sources of Energy
© Food – a fact of life 2008
Energy
Food is the body’s source of energy.
Food provides energy.
We need energy to grow, be active and maintain health.
Different types of food provide different amounts of energy.
Energy is measured in kilojoules – kJ.
© Food – a fact of life 2008
100g of these foods provide …
922 kJ
73 kJ3059 kJ
195 kJ
© Food – a fact of life 2008
Which food provides the least energy?
587 kJ
891 kJ
627 kJ
158 kJ
All foods per 100g.
© Food – a fact of life 2008
Which food provides the most energy?
199 kJ
3059 kJ
291 kJ
1725 kJ
All foods per 100g.
© Food – a fact of life 2008
Uses of energy
Different activities use different amounts of energy.
Which activity uses the most energy?
swimming
walking football
cooking
357kJ/15mins
114kJ/15 mins
196 kJ/15 mins
85kJ/15 mins
© Food – a fact of life 2008
Uses of energy
Different activities use different amounts of energy.
Which activity uses the least energy?
gymnastics horse riding standing
sleeping
153kJ/15mins 144kJ/15
mins42kJ/15 mins
35kJ/15 mins
© Food – a fact of life 2008
Portions
Different amounts of food provide different amounts of energy.
The amount of food is known as a portion.
We eat different amounts of different types of food.
Margarine
Per 100g = 3039kJ
On toast (5g) = 152kJ
Orange
Per 100g = 158kJ
Small (120g) = 190kJ
© Food – a fact of life 2008
Foods providing 400kJ of energyWholemeal bread – 44g
Milk -205 ml
Jacket potato -69g
Orange -253g
Egg – 65g
Butter -13g
Ham - 35g
Tomatoes -548g
© Food – a fact of life 2008
Uses of 400kJ
Swimming -about 24 minutes
Cycling -about 17 minutes
Running -about 17 minutes
Sitting -about 96 minutes
Sleeping -about 116 minutes
Walking -about 31 minutes
© Food – a fact of life 2008
Energy needs are different
Different people need different amounts of energy.
The amount of energy they need depends on their age, job, how active they are and their health.
baby girl 9 year old boy
36 year old man
65 year old woman
2,160 kJ/day
8,240 kJ/day
10,600 kJ/day
7,960 kJ/day
© Food – a fact of life 2008
For further information, go to:www.foodafactoflife.org.uk