An oven is being used to bake cookies in this house. What energy transformations occur when baking cookies in this house?
(1 point)
Responses
heat energy → light energy → chemical energy
heat energy → light energy → chemical energy
heat energy → chemical energy → light energy
heat energy → chemical energy → light energy
light energy → electrical energy → heat energy
light energy → electrical energy → heat energy
heat energy → electrical energy → chemical energy
heat energy → chemical energy → light energy
The total amount of energy in the universe never changes, but the availability of each different type of energy to do work can change tremendously. What best explains this change in available energy?(1 point)
Responses
Energy can only be created through nuclear reactions.
Energy can only be created through nuclear reactions.
Energy can only be transferred as heat.
Energy can only be transferred as heat.
Energy is always converted with 100 percent efficiency.
Energy is always converted with 100 percent efficiency.
Energy is regularly changing from one form into another.
Energy is regularly changing from one form into another.
What is the energy transformation that occurs when a smoke alarm goes off?(1 point)
Responses
sound to light
sound to light
potential to electrical
potential to electrical
electrical to potential
electrical to potential
electrical to sound
sound to electrical
whats the real answer
The real answer is actually electrical to sound. The smoke alarm has an electrical component that converts electrical energy into sound energy when it detects smoke.
You are cooking pasta and putting a pot of water on an electric stove. When the water starts to boil, you add the pasta. What energy transformation occurs to cook the pasta?(1 point)
Responses
nuclear energy to heat energy
nuclear energy to heat energy
mechanical energy to light energy
mechanical energy to light energy
electric energy to heat energy
electric energy to heat energy
heat energy to mechanical energy
electric energy to heat energy
The correct answer is: heat energy → chemical energy → light energy.
Explanation:
When baking cookies in an oven, several energy transformations take place:
1. Heat energy → chemical energy: The oven converts electrical energy into heat energy. This heat energy is transferred to the cookies, causing chemical reactions to occur in the ingredients. For example, the heat causes the proteins in the dough to denature and the starches to gelatinize, resulting in the cookies baking and becoming solid.
2. Chemical energy → light energy: As the cookies bake, the chemical reactions continue, releasing energy in the form of light. This is why the cookies change color and develop a golden or brown crust.
Therefore, the correct sequence of energy transformations when baking cookies in this house is heat energy → chemical energy → light energy.