7th Grade Science Ch 1
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24 Terms
astronomy
the study of physical things beyond the earth's atmosphere
earth science
the study of the earth and the universe around it
environmental science
the study of the relationship between organisims and the enviroment
geology
the study of the solid earth
meterology
the study of the atmosphere
oceanography
the study of the earth's oceans
carbon-14 dating
method used to determine the absolute age of remains that were once living
naturalism
the belief that matter and energy are all that exist and that undriected natrual processes formed the universe
theism
the belief that the universe was created pruposefully by a supernatural being
varves
the light and dark layers of sediments deposited in a yearly cycle
contour line
a line on a map that joins points of equal elevation
latitude
the distance in degrees north or south of the equator
longitude
the distance in degrees east or west of the prime merdian
projection
a system of lines drawn on a flat surface to represent curves
mineral
a naturally occurring inorganic solid with a definite chemical composition and crystalline structure.
mineralogy
the study of minerals, including their composition, properties, and classification.
nonsilicate mineral
a mineral composed of elements or bonded groups of elements other than bonded silicon and oxygen
silicate mineral
a mineral formed by bonded silicon and oxygen atoms
cleavage
a mineral’s tendency to split along definite, flat surgaces
density
the mass per unit of volume of a substance
fracture
a mineral’s tendency to break along irregular lines
hardness
a mineral’s resistance to being scratched
luster
the way a mineral reflects light, which can be described as metallic or non-metallic
streak
the color of the powder left by a mineral when it is rubbed against a hard, rough surface