energy Flashcards
(24 cards)
What is energy?
Energy is the ability to do work or cause change.
True or false: Energy can be created or destroyed.
False. The law of conservation of energy states that energy cannot be created or destroyed, only transformed from one form to another.
What are the two main types of energy?
The two main types of energy are kinetic energy and potential energy.
What is kinetic energy?
Kinetic energy is the energy of motion.
What is potential energy?
Potential energy is stored energy that has the potential to do work.
What is the SI unit of energy?
The SI unit of energy is the joule (J).
What is the formula for calculating kinetic energy?
The formula for calculating kinetic energy is KE = 0.5 * mass * velocity^2.
What is the formula for calculating potential energy?
The formula for calculating potential energy is PE = mass * gravity * height.
What is thermal energy?
Thermal energy is the internal energy of a system due to the kinetic energy of its atoms and/or molecules.
What is the first law of thermodynamics?
The first law of thermodynamics states that energy cannot be created or destroyed, only transferred or transformed.
What is the second law of thermodynamics?
The second law of thermodynamics states that entropy in a closed system tends to increase over time.
What is nuclear energy?
Nuclear energy is the energy released during nuclear reactions, such as fission or fusion.
What is renewable energy?
Renewable energy is energy that comes from resources that are naturally replenished, such as sunlight, wind, and water.
What is non-renewable energy?
Non-renewable energy is energy that comes from finite resources, such as fossil fuels.
What is the energy source for photosynthesis?
The energy source for photosynthesis is sunlight.
What is the energy source for cellular respiration?
The energy source for cellular respiration is glucose.
What is the energy source for geothermal power?
The energy source for geothermal power is heat from the Earth’s interior.
What is the energy source for hydroelectric power?
The energy source for hydroelectric power is moving water.
What is the energy source for wind power?
The energy source for wind power is moving air.
What is the energy source for fossil fuels?
The energy source for fossil fuels is organic matter that has decayed and been transformed over millions of years.
What is the energy source for nuclear power?
The energy source for nuclear power is nuclear reactions, such as fission or fusion.
What is the energy source for solar power?
The energy source for solar power is sunlight.
What is the energy source for biomass energy?
The energy source for biomass energy is organic materials, such as wood or agricultural waste.
What is the energy source for tidal power?
The energy source for tidal power is the gravitational pull of the moon and sun on Earth’s oceans.
