Weather and Cookies (Biology Experiments)

Make the following cookies on two different days-one sunny and dry, the other rainy. The cookies will taste good on both days.
Things Required:
1/2 cup of butter or margarine
1/4 cup of sugar
1/2 tsp vanilla extract
Wooden spoon
1 cup (112 g) of flour plus 1 to 3 extra Tablespoon (8-24 g)
A mixing bowl
A cookie sheet

Directions:
Let the margarine stand at room temperature for 10 to 15 minutes. Then put it in a mixing bowl and add the sugar and vanilla extract. Cream the mixture well with a wooden spoon or in a food processor or electric mixer. Add the flour and continue mixing. When the dough is thoroughly mixed and smooth, remove it from the bowl and form a ball. If it is sticky, roll it in flour until it feels satiny.
Wrap the dough in wax paper and refrigerate for an hour or more.
Preheat the oven to 325°F (165°C).
Cut the ball in half and roll out two logs, adding flour if the dough is sticky.
Slice thin, and place the circles a half-inch apart on an ungreased cookie sheet. Bake in the centre of the oven for 20 minutes or until the bottoms of the cookies are slightly brown.

This Is What Happens:
On both the rainy day and the sunny day, you’ll end up with 4 to 5 dozen great cookies. But it takes several more tablespoonfuls of flour on the rainy day than it does on a dry, sunny day!
Science Behind It:
On a rainy day, the dough soaks up water from the air, gets sticky and is harder to handle. You, therefore, have to use more flour than on a dry day.

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