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45 Cards in this Set

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  • Back
inertia
tendency of a moving body to remain in motion or a stationary body to remain at rest until an outside force acts on it.
speed
the act or state of moving swiftly
velocity
the rate of change of position along a straight line with respect to time
acceleration
the rate of change of velocity with respect to time; also : change in velocity
force
: strength or energy put forth : active power
gravity
the force of attraction between all matter and the universe
chemical bond
force that holds together the atoms that make up a compound
compound
two or more atoms that have been chemically combined
electron
subatomic particle with a negative electrical charge
electron cloud
region of space around the nucleus of an atom in which electrons may be found
energy level
arrangement of electrons within the electron cloud of an atom
gas
physical form of matter that does not have a definate volume or shape
isotope
atom of an element that has the same atomic number but different atomic mass of another atom of that element
liquid
physical form of matter with a definate volume but no definate shape
mass number
sum of the numbers of protons and neutrons in an atom
neutron
subatomic particle with no electrical charge
nucleus
region in the center of an atom that contains the protons and neutrons
solid
physical form of matter with a definate shape and volume
hypothesis
possible explanation of a problem that is based on facts
observation
act of using the senses to gather information
scientific law
rule that correctly describes a natural phenomenom
scientific methods
organized, logical approaches to scientific research
theory
hypothesis or set of hypotheses supported by the results of the experimentation and observation
variable
factor in an experiment that can be changed
aphelion
point in the orbit of a planet at which the planet is farthest from the sun
autumnal equinox
begining of the fall season
daylight savings time
system in which clocks are set one hour ahead of standard time from April to October
international date line
line running from north to south through the Pacific Ocean where the date changes from one day to the next.
perihelion
point in the orbit of a planet at which it is closest to the sun
revolution
movement of a planet around the sun
rotation
spinning of a planet on its axis
seismic wave
vibration that travels through the earth
standard time zone
one of 24 regions of the earth in which noon is set as the time when the sun is highest over the center of the region
vernal equinox
the begining of spring
winter solstice
the begining of winter
contour line
line on a map connecting points with the same elevation
elevation
height above sea level
great circle
any circle that divides the globe in half
latitude
angular distance north or south of the equator
legend
list of map symbols and their meanings
longitude
angular distance east or west of the prime meridian
meridian
semicircle on the earth that runs from pole to pole
parallel
any circle that runs east and west around the earth parallel to the equator
Prime Meridian
the meridian that pass through Greenwich, England designated as O degrees
scale
relationship between distance shown on a map and actual distance