unit 1
what are protons, neutrons, and electrons?
protons are a positively charged particle, neutrons are neutrally charged, electrons are negatively charged
what is motion?
the change in an objects position
how can energy be described as?
the ability to do work
what is static electricity?
the accumulation of excess electric charge
what are fossil fuels?
fuels that are composed of dead organisms
what were the atomic models that were used over the years?
400 BCE Democritus model, 1904 Thomas model, 1911 Rutherford model, 1913 Bohr model
how do you calculate speed?
speed= distance/time
what is a system?
can be single, like a baseball, or multiple, like the solar system
what is electric fields?
what are renewable energy sources?
sources that are easily replenished
how do energy levels work?
electrons absorb energy, and release the energy
how do you calculate acceleration?
acceleration= change in velocity/time
how do you calculate for kinetic energy?
kinetic energy= .5mass * speed2
what is a conductor?
moves electric charges easily
what are non-renewable energy sources?
sources that take millions of years to replenish
how does the electron cloud model work?
the electrons pair in twos, going up from 2 to 8, 8 to 18, 18 to 32
how do you calculate for momentum?
momentum= mass * velocity
what is potential energy?
stored energy
what is an insulator?
does not move electric charge easily
are non-renewable energy sources good for the environment?
no, they release greenhouse gasses and could cause acid rain
what is a quark?
a small particle that forms protons and neutrons
how do you calculate change in velocity?
change in velocity= final velocity - initial velocity
how do you calculate for gravitational potential energy?
gravitational potential energy= mass*gravity*height
what is the law of conservation of charge?
charge can be transferred from object to object, but cannot be created or destroyed
are renewable energy sources good for the environment?
yes, they don't produce greenhouse gasses