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58 terms

Science Final

STUDY
PLAY
scientific method
state problem,gather info,hypothesis,test,observe data,state conclusion,repeat work
adhesion
water molecules stick together
polarity
+/- charges
surface tension
adhesion of water molecules on a surface
meter
unit of measurement for length
liter
unit of measurement for volume of a liquid
gram
unit of measurement for mass
mass
amount of matter in an object
operational definition
statement that describes how a particular variable is to be measured
weight
measurement of the pull of gravity of the mass of an object
density
measure of amount of mass in a certain volume
mass divided by volume equals
density
motion
when an object's distance from its reference point is changing
reference point
place or object used for comparison to determine if something is in motion
distance divided by time equals
speed
velocity
speed in a given direction
acceleration
rate at which velocity changes
newton's first law
object stays at rest/stays in motion until an outside force acts upon it
newton's second law
object accelerates when a force acts upon it
newton's third law
for every action there is an equal and opposite reaction
inertia
resistence to change
net force
overall force on an object after all forces are added together
allele
one gene for a trait
homozygous
both alleles are the same
heterozygous
two different alleles
two kinds of energy
kinetic,potential
kinetic energy
motion
potential energy
stored
forms of energy
mechanical,thermal,chemical,electrical,electro-magnetic,nuclear
mechanical energy
associated with motion or position of an object
thermal energy
total energy of the particals in an object
chemical energy
potential energy stored in chemical bands that hold chemical compounds
electrical energy
moving electrical charges carry
electro-magnetic energy
travels in waves/the light you see
nuclear energy
stored in the nucleus of an atom/released during nuclear reactions
crest
top of the wave
trough
bottom if the wave
amplitude
height of the wave
wavelength
distance between 2 crests
frequency
number of waves in a given space
angle of incidence
where light strikes surface
angle of reflection
where light bounces off
opaque
no light gets through
heat
transfer of thermal energy from a substance at a higher temperature to a substance at a lower temperature
conduction
process when heat is transferred from one particle to another without movement of matter
convection
movement that transfers heat within liquid
convection current
circular flow when hot water rises and cool water takes its place
radiation
transfer of energy by electro-magnetic waves
conductor
material that conducts heat well
insulator
material that does not conduct heat well
evolution
gradual change in species over time
adaptation
trait that helps an organism survive and reproduce
gradualism
evolution occurs slowly but steadily
punctuated equilibria
species evolve during short periods of rapid change
homologous structures
similar body structures that related species have inherited from a common ancestor
cast
mold that becomes filled in with hardened materials
characteristics of living things
made of cells,reproduction,respond to environment,metabolism,movement,life span
needs of living things
food,oxygen,water,living space,energy,homeostasis