9th grade physical science semester 2 final review
motion
An objects change in position relative to reference point
why does velocity affect KE more than Mass?
Because it is squared in the equation
Chemical energy
Bonds between atoms break apart
Renewable energy
Can be replaces within a human lifespan
What two things affect the PE of an object?
Mass and Height
What two things affect the KE of an object?
Mass and Velocity
who is the father of physics
Newton
Kinetic Energy
The energy of a moving object due to the objects motion
electricity energy
The flow of energy through electrons
conduction
Transfer of energy or heat through a material
insulator
a material that prevents unwanted energy transfer
electric field
a region in space around a charged object that causes a stationary charge to experience an electric force
3rd law
action and reaction
resistance
anything that opposes current from flowing
magnetic field
area surrounding a magnet that will cause an attractive or repelling force when another magnet enters it
Non-renewable energy
cannot be replaces within a human lifespan
3 contributions that Newton contributed to science
defined gravity, defined 3 laws of motion, discovered calculus
speed
distance traveled divided by the time it took to get there
static electricity
electrically charged particles that are not moving
2nd law
f=ma
kinetic friction
friction between moving surfaces
1st law
law of inertia
what two things affect an objects momentum
mass and velocity
parallel circuit
more than one pathway for current
acceleration
rate at which velocity changes over time
series circuit
single pathway for current
conductor
substance that allows thermal energy to travel through it easily
energy
the ability to do work
radiation
the energy that is transferred as electromagnetic waves
electric force
the force of attraction or repulsion between two objects due to force
temperature
the measure of the average KE of a substance
convection
the movement of fluids due to the differences in density that are caused by temperature variations
current
the rate at that electric charges move through a conductor
inertia
the resistance of any physical object to any change inits state of motion
velocity
the speed of an object in a particular direction
what affects inertia
unbalanced forces
Which affects KE more, Mass or Velocity?
velocity
work
A force acting through a distance
3 natural magnets
Fe, Ni, Co
Nuclear energy
Fission- splitting of atom Fusion- putting together atoms
state the "law of conservation of energy"
Energy cannot be created or destroyed, it can only change form
Potential energy
Energy of position because it results from the relative position of objects in a system
heat energy
Energy transferred between objects that are at different temperatures
