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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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