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Wheat
and measurement - student activity
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Problem:
How many grains in one kilogram of wheat?
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Equipment:
Balance
or small kitchen scales, Wheat grains from seed merchants or health
food shops.
Follow
the steps and solve this problem:
| 1. |
Draw
a 10 cm square and look at a grain of wheat. |
| 2. |
Estimate
how many grains will fit flat into the 10cm square.Write answer
in table below. |
| 3. |
Spread
grains flat within 10 cm square, make sure there are no gaps,
and then weigh them. Write answer in table below. |
| 4. |
Count
how many grains in a 10 cm square by; |
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| a. |
Counting grains directly from 10 cm square. (If this seems
to be taking too long, you may like try (b) ) |
| b. |
Draw a 1 cm square and spread grains flat within square,
make sure there are no gaps. Count the grains and multiply
the number of grains by 100. This answer will give an
approximate number of grains as in a 10 cm square. Write
answer in table below. |
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| 5. |
Table
of results |
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Estimate
of grains in 10cm square
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Weight of grains in 10 cm square (g)
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Number of grains in 10 cm square
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| 6. |
Using
the information in the table, approximate how many grains in
a kilogram ? |
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A
field bin stores harvested grain in the paddock and is able
to hold 28 tonnes of wheat.
Imagine the huge number of wheat grains it stores !!!!!
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»
go
to wheat and measurement - teacher notes
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