Energy Conversions

What is an example of energy conversion in photosynthesis?

• Light energy is converted into thermal energy.

• Light energy is converted into mechanical energy.

• Light energy is converted into chemical energy stored in glucose.

• Light energy is converted into electrical energy.

What type of energy conversion occurs when a rock falls off a cliff?

• From kinetic energy to thermal energy

• From gravitational potential energy to kinetic energy

• From elastic potential energy to kinetic energy

• From chemical energy to mechanical energy

What is the significance of energy efficiency in energy conversions?

• It measures the total energy consumed in a process.

• It indicates how much useful energy is obtained from a process compared to the energy input, minimizing waste.

• It focuses solely on renewable energy sources.

• It is irrelevant to energy conservation efforts.

How does a battery convert energy?

• A battery converts chemical energy into electrical energy.

• A battery converts electrical energy into thermal energy.

• A battery converts mechanical energy into chemical energy.

• A battery converts solar energy into electrical energy.

What is kinetic energy?

• Kinetic energy is the energy of an object in motion.

• Kinetic energy is the energy stored in an object at rest.

• Kinetic energy is the energy associated with an object's temperature.

• Kinetic energy is the energy released during a chemical reaction.

What is the role of friction in energy conversion?

• Friction increases kinetic energy without any loss.

• Friction converts kinetic energy into thermal energy, often resulting in heat.

• Friction has no effect on energy conversion.

• Friction only affects potential energy.

What type of energy conversion occurs in a hydroelectric power plant?

• Gravitational potential energy to kinetic energy to electrical energy

• Chemical energy to thermal energy to electrical energy

• Nuclear energy to thermal energy to mechanical energy

• Solar energy to electrical energy to kinetic energy

What is energy conversion?

• The process of changing one type of energy into another type of energy.

• The process of creating energy from nothing.

• The process of storing energy for future use.

• The process of measuring energy in different forms.

What is an example of energy conversion in a light bulb?

• Electrical energy is converted into sound energy and light energy.

• Electrical energy is converted into light energy and thermal energy.

• Chemical energy is converted into electrical energy and light energy.

• Mechanical energy is converted into electrical energy and thermal energy.

What is potential energy?

• The energy of an object in motion.

• The energy stored in an object due to its position or state.

• The energy released during a chemical reaction.

• The energy required to change the temperature of an object.