Conservation of Energy in Grade 5

What is the law of conservation of energy?

• Energy cannot be created or destroyed, only transformed from one form to another.

• Energy can only be transformed into matter

• Energy is not affected by any physical laws

• Energy can be created and destroyed at will

Give an example of potential energy and kinetic energy conversion.

• A car driving on a flat road

• A ball rolling on a flat surface

• Roller coaster car going down a hill

• A rock sitting on the ground

Explain the concept of energy transformation with an example.

• When a ball is thrown into the air, the potential energy of the ball is transformed into heat energy as it moves upward.

• When a ball is thrown into the air, the potential energy of the ball is transformed into light energy as it moves upward.

• When a ball is thrown into the air, the potential energy of the ball is transformed into kinetic energy as it moves upward, and then back into potential energy as it reaches its highest point.

• When a ball is thrown into the air, the potential energy of the ball is transformed into sound energy as it moves upward.

What are the different forms of energy? Provide examples for each.

• Kinetic energy, potential energy, static energy

• Mechanical energy, thermal energy, chemical energy, electrical energy, electromagnetic energy, nuclear energy, and sound energy

• Solar energy, wind energy, water energy

• Light energy, dark energy, colorful energy

How does friction affect the conservation of energy?

• Friction converts mechanical energy into thermal energy

• Friction increases mechanical energy

• Friction has no effect on conservation of energy

• Friction converts mechanical energy into electrical energy

Discuss the role of energy conservation in everyday life.

• Energy conservation is only important for large businesses, not for individuals

• Energy conservation does not lead to any cost savings

• Energy conservation has no impact on the environment

• Energy conservation helps in reducing energy consumption, saving money, and protecting the environment.

Explain the difference between renewable and non-renewable sources of energy.

• Renewable sources are more expensive than non-renewable sources

• Renewable sources are only used in developing countries

• Non-renewable sources are better for the environment than renewable sources

• Renewable sources can be replenished naturally, while non-renewable sources cannot be easily replenished and will eventually run out.

What is the impact of energy conservation on the environment?

• Has no impact on the environment

• Increases the demand for fossil fuels and increases greenhouse gas emissions

• Causes more pollution and harm to the ecosystem

• Reduces the demand for fossil fuels and decreases greenhouse gas emissions

Describe the concept of energy efficiency and its importance.

• Using energy without any consideration for conservation

• Using less energy to provide the same service

• Using more energy to provide the same service

• Energy efficiency has no importance

How can individuals contribute to energy conservation at home and in the community?

• By using energy-efficient appliances, turning off lights and electronics when not in use, using public transportation or carpooling, and participating in community clean-up and recycling programs.

• Leaving all lights and electronics on 24/7

• Using old and inefficient appliances

• Throwing recyclable materials in the regular trash