Science Test Flashcards
What is energy?
The ability to cause change
Measured in Joules ( J )
What is kinetic energy?
What is potential energy?
Energy in motion
Stored energy
Formula for kinetic energy
KE = 1/2 mv(squared)
Mass is measured in…
Velocity is measured in…
kg
m/s
What are the three types of potential energy?
Elastic, Chemical, and Gravitational.
Elastic Potential Energy
energy stored in objects being compressed or stretched (Ex. Bow and arrow, spring, slingshot)
Chemical Potential Energy
energy stored in chemical bonds of compounds. (Ex. Firewood, Battery. Food)
Gravitational potential energy
energy stored in objects that are above Earth’s surface.
Height is measured in…
Acceleration due to gravity is measured in…
m (meters)
(m/s) squared
Name the 6 forms of energy
Radiant, thermal, electrical, sound, nuclear, electromagnetic
Mechanical energy
the total amount of kinetic and potential energy in a system.
Conduction
transfer of energy through matter by direct contact of
particles. (Solids are best
conductors of heat.)
Convection
transfer of energy by the movement of heated particles.
(Occurs in liquids and gases.)
Conductors
materials that allow heat to flow
easily
Insulators
materials that do not allow heat to flow easily
Specific heat / change in thermal energy / heat formula
Q=mcAt (The A is a delta)
c = specific heat ( J/kg C )
Q = change in thermal energy ( J
Change in temperature (Delta T)
( T final - T initial )
Work formula
W = Fd
Measurements ( J = Nm )
Power formula
P = W / t
Measurements ( W or J/s = Js )
