Activity Sheet 2 Name:_______
How much energy do you need?
In activity 1 we calculated how much work was done running up stairs. Where did that energy for this work come from? There are various different types of energy. Chemical energy comes from the food we eat and drink provides the energy for our bodies to do work.
Food energy
Let’s look at the energy content, in kJ, of some foods and drinks. We can then calculate how much energy they supply and how much work can be done. Have a look at the nutritional information panels provided by your teacher. They have an energy rating, given in kJ or kJ per serving per 100g. This is the amount of chemical energy that the food or drink provides to your body.
Energy used in various activities (kilojoules)
Activity 15 min 30min 45min 60min
Sitting quietly 15 35 50 70
Writing 15 35 50 70
Standing 20 40 65 85
Vacuuming 115 225 340 450
Walking 140 285 425 570
Running 295 585 880 1170
Swimming 330 660 990 1320
Using the table above to calculate how many minutes of each activity you could do with the kJ in 100g of food.
Example: 100g of Wheatbix gives 1490 kJ of energy.
This means I can do 21.2 hours of sitting quietly.
100g of ______ gives _______kJ means I can do ______ minutes/hours of sitting.
100g of ______ gives _______kJ means I can do ______ minutes/hours of writing.
100g of ______ gives _______kJ means I can do _____minutes/hours of standing.
100g of ______ gives _______kJ means I can do ___minutes/hours of vacuuming.
100g of ______ gives _______kJ means I can do _____ minutes/hours of walking.
100g of ______ gives _______kJ means I can do _____ minutes/hours of running.
100g of ________ gives _______kJ means I can do ______ minutes/hours of swimming.
Credits
Activity Sheet 2 modified with materials from Glimpses of Science (Connor, etal, 2010) and the Surfing Scientist (ABC Science Online, 2006).
How much energy do you need?
In activity 1 we calculated how much work was done running up stairs. Where did that energy for this work come from? There are various different types of energy. Chemical energy comes from the food we eat and drink provides the energy for our bodies to do work.
Food energy
Let’s look at the energy content, in kJ, of some foods and drinks. We can then calculate how much energy they supply and how much work can be done. Have a look at the nutritional information panels provided by your teacher. They have an energy rating, given in kJ or kJ per serving per 100g. This is the amount of chemical energy that the food or drink provides to your body.
Energy used in various activities (kilojoules)
Activity 15 min 30min 45min 60min
Sitting quietly 15 35 50 70
Writing 15 35 50 70
Standing 20 40 65 85
Vacuuming 115 225 340 450
Walking 140 285 425 570
Running 295 585 880 1170
Swimming 330 660 990 1320
Using the table above to calculate how many minutes of each activity you could do with the kJ in 100g of food.
Example: 100g of Wheatbix gives 1490 kJ of energy.
This means I can do 21.2 hours of sitting quietly.
100g of ______ gives _______kJ means I can do ______ minutes/hours of sitting.
100g of ______ gives _______kJ means I can do ______ minutes/hours of writing.
100g of ______ gives _______kJ means I can do _____minutes/hours of standing.
100g of ______ gives _______kJ means I can do ___minutes/hours of vacuuming.
100g of ______ gives _______kJ means I can do _____ minutes/hours of walking.
100g of ______ gives _______kJ means I can do _____ minutes/hours of running.
100g of ________ gives _______kJ means I can do ______ minutes/hours of swimming.
Credits
Activity Sheet 2 modified with materials from Glimpses of Science (Connor, etal, 2010) and the Surfing Scientist (ABC Science Online, 2006).
| energy_activity_sheet_2.doc |
