Forms of Energy
What is Energy?
The ability to do work or cause change
What happens when energy changes from one form to another?
A Transformation occurs
What is the law of conservation of energy?
Energy cannot be created or destroyed, only changed in form
What energy change happens when you charge your phone?
Electrical ----- Chemical
What is the main source of energy for Earth?
The Sun
What type of energy is stored in food and fuel?
Chemical Energy
When you eat food and then run, what energy transformation happens?
Chemical-Kinetic
True or False: Energy can disappear completely.
False
When a toaster heats bread, what energy change happens?
Electrical → Heat
What type of energy is used to power homes?
Electrical energy
What kind of energy comes from moving objects?
Kinetic Energy
What energy transformation happens when you turn on a lamp?
Electrical → Light (and Heat)
When energy seems to be lost, where does it usually go?
It turns into heat energy
When you play music on a speaker, what energy change happens?
Electrical → Sound
True or False: All energy transformations are 100% efficient.
False
What type of energy is stored in an object due to its position or height?
Potential Energy
When a car engine burns gasoline, what energy transformation happens?
Chemical → Mechanical
If a roller coaster slows down, what form of energy increases?
Thermal energy due to friction
When a wind turbine spins, what energy change happens?
Mechanical → Electrical
What type of energy is released during combustion?
Heat and Light
Light, heat, and sound are all forms of what kind of energy?
Radiant energy (a form of kinetic energy)
A solar panel changes sunlight into what kind of energy?
Electrical energy
Name two types of energy involved when a ball is thrown upward.
Kinetic and Potential energy
What energy transformation happens in photosynthesis?
Light → Chemical
What type of energy transformation happens when you rub your hands together?
Mechanical-----Thermal