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Energy and its Transformations - Elementary/Primary
Transcript of Energy and its Transformations - Elementary/Primary
Types of Energy
Kinetic and Potential Energy
Mechanical Waves have to move through something to transfer energy.
Energy and its Transformations
The Law of Conservation of Energy
Mr. Chinua Mosley
Energy is the ability to do work
Energy CANNOT be created or destroyed. It can only be changed from one form of energy to another form of energy.
Potential Energy is energy an object has because of where it is located or what it is made out of.
If you hold a cell phone above the ground, you give it the potential energy for falling to the ground.
Dynamite has potential energy because it is made out of chemicals that have the potential to explode.
Kinetic Energy is the energy of movement.
When objects are still, they have potential energy. When objects move, they have kinetic energy. Objects are constantly going back and forth between having kinetic energy and having potential energy.
The Different Forms of Energy
Potential: Stored Energy
Kinetic: Energy in Motion
Chemical Energy is energy stored in matter like in food or fuel.
Nuclear Energy is energy from the atoms that make matter. It's used in nuclear power plants.
Gravitational Energy comes from an item's position like being at the top of a hill or being in your hand.
Stored Mechanical Energy is energy stored in a object by adding a force to it like holding down a spring or pulling back a rubber band.
Electrical Energy is from moving electricity.
Radiation is energy that travels in invisible waves like microwaves, x-rays and light.
Sound Energy is from vibrating objects.
Mechanical Energy is from motion and work like wind or walking.
Thermal Energy is from the energy of heat.
Stop your notes
here for now.
Conduction is transfer of heat by direct contact. When you put a spoon in boiling water, the spoon gets hot because of conduction.
Convection happens when a gas or liquid heats and cools in a cycle. Ovens and boiling water have convection
Radiation happens when heat is sent through electromagnetic waves. The sun heats the Earth with radiation. The heat you feel from a fire is radiation.
Electromagnetic waves can transfer energy through empty space
Wavelength is the length of one full wave.
Amplitude is the distance from the midpoint of a wave to its top of bottom
Pitch is the property of sound that changes with the frequency.
High pitch sounds have high frequency and a short wavelength. Low pitch sounds have low frequency and a long wavelength.
Volume is affected by amplitude. The higher the amplitude, the higher the volume. The lower the amplitude the lower the volume.
Reflection is when light bounces off of an object.
Refraction is when light changes direction when it goes through an object.
Diffraction is when light bends around a barrier.
Light is absorbed when it enters and object and stays.
The colors that you see are being reflected by the objects that you are looking at.
Don't copy these instructions.
These are notes.
Write everything that isn't red.