Question 1: What is the unit of energy in the International System of Units?

Answer: Joule

Question 2: Which of the following is an example of kinetic energy?

Answer: A moving car

Question 3: Which energy transformation occurs in a battery-powered flashlight?

Answer: Chemical to electrical to light energy

Question 4: True or False: Energy can be created and destroyed.

Answer: False

Question 5: True or False: A boulder at the top of a hill has potential energy due to its position.

Answer: True

Question 6: Describe what happens to energy when a car brakes suddenly.

Answer: Kinetic energy is converted into thermal energy through friction.

Question 7: Explain the energy transformation in a hydroelectric power plant.

Answer: Potential energy of stored water is converted to kinetic energy as water flows, which then turns turbines generating electrical energy.

Question 8: Calculate the gravitational potential energy of a 5 kg object raised to a height of 10 m. Use the formula: GPE = mgh (where g = 9.8 m/s²).

Answer: 490 Joules

Question 9: Match the following forms of energy to their examples.

Answer: See full answer key

Question 10: Order the following steps for converting wind energy to electrical energy.

Answer: See full answer key

Question 11: Fill in the blank: The _______ energy of an object is related to its motion and mass.

Answer: kinetic

Question 12: Discuss the importance of energy conservation and provide examples of how energy can be conserved in everyday life.

Answer: Energy conservation is crucial for reducing resource depletion and environmental impact. Examples include using energy-efficient appliances, reducing water heating costs, and using renewable energy sources.