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science finals

everything science

earth science study of earth and of the universe around it
geology study of the orgin history processes and structure of the solid earth
oceanogrphy study of earths oceans
meteorology study of earths atmosphere
astronomy study of the universe beyond earth
galaxy large collection of stars
astronomical unit approximates the average distance between earth and sun
electromagnetic spectrum all of the wavelengths of electromagnetic radiation
perihelion point at which planet is closest to sun
aphelion point at which planet is farthes away from sun
days in one year 365 1/4
leap year every 4 years the 1/4 day adds up and puts a extra day on febuary
solstices seasons of summer and winter begin on days
equinox the sasons fall and spring begin on days
autumnal equinox begins on september 22 or 23 of each year
vernal equinox begins on march 21or 22 of each year
summer solstice june 21-22
winter solstice 21-22
solar system consists of the sun the planets and all of the other bodies that revolve around the sun
planets the primary bodies that orbit the sun
satellite a body that orbits a larger body
mare dark areas on the moon
craters bowl shaped depressions on the moon
rilles long deep channels on the moon
rays streaks that extend outward from the impact site on the moon
regolith rock and dust on moons surface
eclipse occurs when one celestial body passes trhough the shadow of another
umbra sunlight is completely blocked
penumbra sunlight is only partially blocked
solar eclipse when the moon is directly between the sun and part of earth
lunar eclipse occurs when earth is positioned between the moon and the sun.
star ball of gases
light year distance traveled in one year
apparent magnitude brightness of a star as it appears to us on earth
absolute manitude the true brightness of a star
matter anything that takes up space and has mass
element substance that cannot be broken down into simpler
atom smallest unit of an element that has the chemical properties of that element
isotope atom that has the same number of protons as other atoms of the same element do but has a different number of neutrons
average atomic mass weighted average of the atomic masses of the naturally occuring isotopes of an element
atomic number number of protons in the nucleus of n atom
mass number sum of the number of protons and neutrons in an atom
compound substance that is made of two or more elements that are joined by chemical bonds between the atoms of those elements
chemical bond forces that hold together the atoms in molecules
ion particle such as an atom or molecule that carries a charge
ionic bond attractive force between oppositely charged ions that result from the transfer of electrons from one atom to another
covalent bond a bond that is formed by the attraction between atoms that share electrons
mineral a natural usually inorganic solid that has a characteristic chemical compsition an orderly internal structure and a characteristic set of physical properties
luster light that is reflected from a minerals surface
cleavage tendency of a mineral to split along specific planes of weakness to form smooth flat surfaces
fracture break unevenly into pieces that have curved or irregular surfaces
Created by: mktmac