1. On a summer day 8 m² solar cells produce 5 kWh energy in average.

    In the summer of 2010 this amount was produced in 80 days.

    Question: How long could one household be supplied with 8 kWh?

    Solution: 5 kWh ............80 days

                         8 kWh ..............?__ __

                         1 kWh ................. 80 divided by 5 (=16)

                         8 kWh...................8 times 16 = 128

    Answer: With 8 kWh one household could be supplied for 128 days.

   With 1 kWh you can use a machine of 1000 W for one hour (a washing machine for example).

2.

1. Find the order according to size !
2. Draw the pie chart as a  vertical bar chart.

( It´s easyif you take 1 % as 1 mm)

3. Find the correct  order according to size !
4. Draw the pie chart as a  vertical bar chart.

(It´s easyif you take 1 % as 1 mm)

5. Which forms of energy are only used in Germany?

Which forms of energy are only used in Austria ?

6. Colour your vertical bar-chart, using the same colour for the same forms of enery!

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