Unit One: Energy and its Transformation Darya Raeisghasem
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Phase Change
Melting point
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Energy Conversion
sublimation
freezing point
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radiation
once water reaches its freezing point, it becomes ice
a freezing point is the temperature at which a liquid will become a solid.
The temperature at which a solid will become a liquid
When ice reaches its melting point, it becomes water.
changing a solid to a gas, without reaching the liquid state.
as snowflakes hit a human, they often evaporate into steam.
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convection
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When a newtons cradle stops, it has not lost its energy. Only transferred it into the air around it and into other types of energy.
energy conservation is the law that energy cannot be created nor destroyed, only transferred.
the act of one state of matter changing into another
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plasma
fire is a common type of plasma
plasma is a state of matter that does not fit into the other 3. It is ionized gas
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Energy
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Types of energy
Kinetic energy
types
thermal energy
energy created by heating an object up
heating up water will create greater thermal energy, and will result in water vapor.
Definition
energy determined by mass times speed
Examples
a ball rolling down a hill has kinetic energy, while a stationary ball does not
Potential energy
Definition
Energy determined by height times mass
types
gravitational potential energy
energy an object has in relation to objects around it. The gravitational pull something has
the earth has les gravitational energy than the sun
elastic potential energy
examples
pulling back a slingshot builds up potential energy.
elastic energy is potential energy by bending, stretching, pulling, or deforming an object impermanently. Like a spring!
Examples
a ball at the top of a hill will have a greater potential energy than one at the bottom
Definition
Energy is power derived from chemical and physical sources, used to create light, heat, movement, and more.
Examples
Heat, light, machinery
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THERMAL ENERGY
Thermal energy is a type of potential energy categorized by the use of temperature and heat.
TRANSFER
conduction
convection
Radiation
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the sun heating up the ground is radiation energy
radiation thermal energy is created without making direct contact
energy created by making direct contact with an object
touching hot metal and being burned is an example of conduction
Convection is energy created by the heating and cooling of air or liquid. Density, rising, and cooling
boiling water is an example of convection