The universe’s total amount of energy does not ever change, but the amount of this energy that is available to do work varies tremendously. What statement best explains the changes in available energy?(1 point) Responses The only way to create energy is through nuclear reactions. The only way to create energy is through nuclear reactions. Energy transfer always occurs through heat. Energy transfer always occurs through heat. 100% of energy is always converted with perfect efficiency. 100% of energy is always converted with perfect efficiency. Energy constantly changes from one form to another.

Answer 1

The statement that best explains the changes in available energy is: Energy constantly changes from one form to another.

This reflects the principle of energy conservation and transformation, where energy can change forms (e.g., from kinetic to potential energy, or from thermal energy to mechanical work), affecting its availability to do work.

Answer 2

When a match is struck, what forms of energy does the burning match give off?(1 point) Responses Light energy and thermal energy Light energy and thermal energy Nuclear energy and light energy Nuclear energy and light energy Solar energy and nuclear energy Solar energy and nuclear energy Thermal energy and solar energy

Answer 3

When a match is struck, it gives off light energy and thermal energy.

The combustion of the match produces heat (thermal energy) and light, which are the primary forms of energy released during the burning process.

Answer 4

A light is connected to a battery as shown below. What type of energy transfer occurs? (1 point) Responses Chemical energy to electrical energy Chemical energy to electrical energy Chemical energy to mechanical energy Chemical energy to mechanical energy Electrical energy to mechanical energy Electrical energy to mechanical energy Mechanical energy to electrical energy

Answer 5

The correct response is: Chemical energy to electrical energy.

In this scenario, the battery stores chemical energy, which is converted into electrical energy to power the light.

Answer 6

When an electric fan is plugged into a wall outlet, the fan blades spin as a result. What energy transformation occurred?(1 point) Responses Mechanical energy is created, but electrical energy is destroyed. Mechanical energy is created, but electrical energy is destroyed. Electrical to mechanical Electrical to mechanical Mechanical to electrical Mechanical to electrical Electrical energy is created, but mechanical energy is destroyed. Electrical energy is created, but mechanical energy is destroyed.

Answer 7

The correct response is: Electrical to mechanical.

In this scenario, electrical energy from the wall outlet is transformed into mechanical energy, which causes the fan blades to spin.