Problem to be Solved:
How does the amount of sugar affect bread rising?
Hypothesis:
The dough with one and a half teaspoons of sugar will rise the most
because it is the biggest amount of sugar out of the four groups of dough.
Procedure:
Recipe1:
Dissolve one package of dry yeast in warm water. Stir in one and
a half teaspoons of sugar, two thirds of a teaspoon of salt, one
tablespoon and one teaspoon of oil, and one and a half cups of the
flour. Beat until smooth. Mix in enough remaining flour to
make dough easy to handle.
Turn dough on lightly floured board; knead until smooth and elastic, 8
to 10 minutes. Place in lightly greased bowl; brush top with salad
oil. Cover; let rise in warm place until double, about 45 minutes
(Dough is ready if impression remains).
Punch down dough. Roll into small rectangles, 2 x 5 inches.
Roll up, beginning at short side. With side of hand, press each end
to seal. Fold ends under loaf. Place seam side down in small
greased loaf pan, 2 x 5 inches. Brush loaves with salad oil.
Let rise until doubled, about 1 hour.
Heat oven to 400 degrees. Bake about 335 minutes or until loaves
sound hollow when tapped.
Recipe 2: Repeat the directions above but only add one teaspoon of
sugar.
Recipe 3: Repeat the directions above but only add half a teaspoon of
sugar.
Recipe 4: Repeat the directions above but add no sugar.
After all four loaves of bread have been baked, measure their height
with a ruler (centimeters). Each loaf of baked bread should rise to
a different height. My control group is the standard recipe.
Conclusion:
My hypothesis was incorrect. The recipe with 1 teaspoon of sugar
had the biggest height out of the four recipes. The recipe with 1.5
teaspoons of sugar was very close in height to the recipe with 1 teaspoon
of sugar, but less than one teaspoon of sugar resulted in shorter bread
heights.
Biblical Application:
1 Corinthians 5:6-8 says, "Your boasting is not good. Do you
not know that a little leaven leavens the whole lump of dough? Clean
out the old leaven that you may be a new lump, just as you are in fact
unleavened. For Christ our Passover also has been sacrificed.
Let us therefore celebrate the feast, not with old leaven, nor with the
leaven of malice and wickedness, but with the unleavened bread of
sincerity and truth."
Just a little leaven leavens a whole lump of dough. If we have
bad influences in or life we should try to stay pure and not sin. A
bad influence can make you sin too and then we might spread sin on
others. We should try not to sin.
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2nd Place, 7th Life Science, PCA Science Fair