Energy Sources
What is a renewable energy source?
A source of energy that can be replenished naturally, like solar or wind energy.
What is conduction?
The transfer of heat through direct contact between materials.
What is kinetic energy?
The energy of an object in motion.
What does it mean to conserve energy?
To use less energy by being more efficient or reducing waste.
What is an example of energy being converted from one form to another?
A toaster converts electrical energy into thermal energy to toast bread.
Name one nonrenewable energy source.
Fossil fuels, such as coal, oil, or natural gas.
Define convection in terms of energy transfer.
The transfer of heat through the movement of fluids (liquids and gases) caused by temperature differences.
Define potential energy.
The stored energy of an object due to its position or state.
Name one way to conserve energy at home.
Turning off lights when not in use.
How do plants use energy from the sun?
Through photosynthesis, plants convert solar energy into chemical energy.
How does solar energy work?
Solar energy is harnessed from the sun using solar panels that convert sunlight into electricity.
What is radiation?
The transfer of energy through electromagnetic waves, such as heat from the sun.
What is thermal energy?
The total kinetic and potential energy of particles in an object, related to temperature.
Why is it important to conserve energy?
It helps to protect the environment, saves money, and preserves resources for future generations.
What happens to energy when you ride a bicycle?
Your body converts chemical energy from food into kinetic energy to move the bike.
What is geothermal energy?
Energy obtained from the heat stored beneath the Earth's surface.
Describe an example of energy transfer in a light bulb.
Electrical energy is converted into light energy and thermal energy in a light bulb.
Give an example of chemical energy.
Energy stored in food or batteries, released during chemical reactions.
What role do energy-efficient appliances play in conservation?
They use less energy to perform the same tasks, leading to reduced energy consumption.
Describe how a roller coaster demonstrates energy transformation.
At the top of a hill, the coaster has potential energy, which converts to kinetic energy as it descends.
Explain how biomass (plants or animals) can be used as an energy source.
Biomass is organic material that comes from plants and animals, and it can be burned or converted to produce energy.
How do sound waves transfer energy?
Sound waves transfer energy through vibrations in the air.
How is electrical energy produced?
Electrical energy is produced by the movement of electrons, often generated in power plants.
Explain how public transportation can help conserve energy.
It reduces the number of individual vehicles on the road, leading to lower overall fuel consumption.
How does a wind turbine generate energy?
Wind energy turns the blades of the turbine, converting kinetic energy into electrical energy.