Energy Transformations in a Bakery
A busy bakery is opening for the day. The baker enters the kitchen and turns on the light. Her tasks in the morning are to make bread and make icing for cookies.
To make the bread, she adds flour, water, salt, and yeast into an electric mixer. She plugs in the mixer and the metal hook starts spinning, combining the ingredients together. When they are combined, she puts the dough into a loaf pan. She places some cold butter in the microwave and turns it on. She watches the bowl of butter spin around inside. When the microwave beeps, she removes the melted butter and drizzles it on top of the bread loaf. She sets a timer and places the bread loaf in the oven to bake.
Moving on to the cookies icing, she combines butter, powdered sugar, milk, and vanilla to a bowl. She uses her battery-powered hand mixer to whisk the ingredients together. She spreads the smooth icing on each cookie and tops each one with sprinkles. When she finishes the cookies, she hears the oven timer. The bread is baked and golden brown. She is ready to open the bakery.
Her bakery is shown.
Multiple Choice Question
What energy transformation is occurring while the bread is baking?
A.
Mechanical energy is transformed into heat energy.
B.
Electrical energy is transformed into thermal energy.
C.
Electrical energy is transformed into chemical energy.
D.
Thermal energy is transformed into mechanical energy.