Vocab Part 1
the transfer of thermal energy by molecular and electronic collisions within a substance
conduction
any bending of light by means other than reflection or refraction
diffraction
In what direction does thermal energy pass?
warmer to cooler
what side of the magnet is positive?
North
In what direction do transverse waves move?
side to side
the transfer of energy by means of electromagnetic waves
radiation
an electric circuit with 2 or more devices connected in such a way that the same voltage travels across all of them
parallel circuit
How do molecules move when substances are warmer?
faster
What do conductors allow to pass through?
free electrons
what do you call the high point of a wave?
crest
the transfer of thermal energy in a gas or liquid by means of currents in the heated fluid. the fluids flow carrying energy with it
convection
an electric current that repeatedly reverses its current
alternating current
in what 3 ways does heat transfer?
conduction
convection
radiation
What happens to current if resistance is increased?
it decreases
at what speed does light move
300,000 kilometers per second
the total energy (kinetic and potential) of the microscopic particles that make up a substance (often call internal energy)
thermal energy
the number of vibrations per unit time
frequency
What is kinetic theory?
The kinetic theory of matter is that matter is made up of tiny particles that are always moving.
In what direction do alternating currents move?
1st in one direction then the other
If a ray of light is reflected in which direction will it travel?
back to the object it came from
the bending of waves due to change in wave speed
the bending of waves due to change in wave speed
refraction
the continuous range of electromagnetic waves that extends in frequency from radio waves to gamma rays
electromagnetic spectrum
Fill in the missing words: Molecules are __________ together when temperature is warmer, and move __________ when colder.
closer; apart
match the particles to the charges.
proton neutral
neutron positive
electron negative
proton- positive
neutron-neutral
electron- negative
What causes a bend in the image of a pencil in water?
diffraction