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Chapter 2 E.S.
Environmental Science
Question | Answer |
---|---|
astronomical distances are measured in units | light-years |
star cluster, a family between a million and a trillion stars | galaxy |
when planets travel around the sun in elliptical paths | orbits |
the divisions of the year and are also loosely based on the time it takes the moon to complete its cycle of phases | months |
the bulging of the ocean | high tide |
occurs between the two high-tide bulges | low tides |
when the sun and moon are in line, during the new moon and full moon phases, their gravitational force combine to produce very high tides | spring tides |
when the sun and moon are at a right angle to the Earth, during first- and third quarter phases, the result is lower than normal tides | neap tides |
when it takes the Earth 365.25 days to complete one revolution around the sun | year |
an imaginary line around the earth that divides it into northern and southern halves, called hemispheres | equator |
the time it takes earth to make one rotation on its axis | day |
the day where it has the longest period of daylight | summer solstice |
the shortest period of daylight in the Northern Hemisphere | winter solstice |
when the sun is directly overhead at the equator | spring and autumnal equinox |
doesn't need oxygen | anarobic |
needs oxygen | arobic |
what are the 3 distinct areas of the Earth? | lithosphere, hydrosphere, atmosphere |
the solid portion of the earth | lithosphere |
the water on or surrounding the earth | hydrosphere |
the sea of gasses the earth has trapped | atmosphere |
basic building block for all matter | atom |
what are the levels of matter | 1.sub-atomic parts 2.forms an atom 3.element 4.mixtures 5.compounds (simple-inorganic, complex-organic) |
what are the levels of living units | 1.cell orginellis 2.cells 3.tissue 4.organs 5.organ systems 6.organism-a species 7.populations 8.communities 9.ecosystem 10.biomes 11.biosphere 12.earth 13.solar system 14.galaxy 15.universe |