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| ways machines can make work easier |
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| change distance, change force, change direction |
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| sliding, fluid, static, rolling |
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measures acidity of substance on a scale of 1-14
<7 acid, 7 neutral, >7 base |
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| percentage of atmosphere that is oxygen |
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| percentage of atmosphere that is carbon dioxide |
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| percentage of atmosphere that is nitrogen |
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| number of different animals in an area; all connected to one another - without one, all affected |
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| study of where organisms live |
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| chemical formula for water |
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| find volume of irregular shaped object by measuring water it displaces |
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| chemical formula for carbon dioxide |
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| a molecule with an electronically charged area (i.e. water molecules) |
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| substance being dissolved |
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| 1970s, Niagara Falls, toxic waste "dioxin" dumped by a petroleum company leaked out and caused birth defects and miscarriages |
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| could die out soon; soon to be endangered |
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| ways to determine size of a population |
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| direct observation (count), indirect observation (nests), sampling, mark & recapture, estimate |
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| force applied to confined fluid, pressure distributed equally |
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| gravitational acceleration |
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| length of a butterfly leg |
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| volume of a swimming pool |
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| earth, sun, moon alignment |
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| attraction of molecules of the same substance (water sticking together) |
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| attraction of molecules of different substances |
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| attraction of molecules causing it to move up against the force of gravity (water from roots get to leaves) |
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| unstable atom loses energy |
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| time required for one half of the atoms in a sample to decay |
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| help geologist match rock layers to tell relative age |
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| hollow area in the sediment in the shape of an organism or part |
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| solid copy of the shape of an organism |
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| provide evidence of the activities - footprints, trails, burrows |
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| principle that states that older rocks are underneath younger rocks |
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| millimeters in a centimeter |
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| continental ridge, trench, abyssal plain, continental shelf |
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| changes at bottom of ocean |
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| pressure increases, temperature decreases, light decreases |
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| what are the 6 simple machines |
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| lever, pulley, inclined plane, wheel & axle, wedge, screw |
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| percentage of fresh water |
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| percentage of water in ocean |
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| percentage of water available for use |
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| example of a inclined plane |
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| example of a wheel & axle |
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| cancer fighting drug made from the pacific yew tree |
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| feeding mice with diff food, independent variable |
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| feeding mice with diff food, dependent variable |
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| feeding mice with diff food, control |
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| temperature, water, size of cage |
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| mass of a substance contained in a given volume |
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| changes as a reaction to independent variable |
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| objects with greatest densities are near the bottom |
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| as the speed of a moving fluid increases, the pressure within the fluid decreases |
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| industry, household, agriculture, transportation, recreation |
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| force that is exerted on an object that causes it to move some distance |
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| highest amount of organisms living in an area |
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| when carrying capacity is reached |
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| crowded; competition for food and home occurs |
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| amount of matter in object v. gravitational pull on an object |
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| desert, rain forest, tundra, boreal forest, grasslands, deciduous forest |
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| importance of protecting the everglades |
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| prevent floods, protect species |
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| where fresh and salt water meet |
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| process of removing salt from saltwater |
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| ocean more dense at the ... |
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| North pole, not equator b/c water is more dense the colder it gets (ice or deeper in ocean) |
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| measures density of water |
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| eras in geological history |
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| cenozoic, mesozoic, paleozoic |
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| oxygen/carbon dioxide cycle |
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| plants, consumers, photosynthesis, waste |
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| transpiration, precipitation, condensation, evaporation, evapo-transpiration, surface run-off, infiltration |
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| atmosphere, animal proteins, plant proteins, decaying matter, waste, bacteria, nitrogen fixation |
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| major divisions in geologic time |
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| cenozoic, mesozoic, paleozoic, precambrian |
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| water that is given off by plants |
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| rate at which work is done |
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| An object at rest tends to stay at rest; an object in motion tends to stay in motion; unless acted upon by an outside force. |
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| For every action there is an equal and opposite reaction. |
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| nursery for young marine organisms, filtration of dirt and pollution, recreation |
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| movement of a substance from high to low concentration |
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| diffusion of water from high to low concentration |
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| the tendency of an object in motion to stay in motion |
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| danger in drinking salt water |
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| body's cells will dry out |
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| Calculate force needed to move a 50kg object at an acceleration of 10 m/s/s? |
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| 50kg x 10 m/s/s = 500 kgm/s/s or Newton |
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| the unit of force required to accelerate a mass of one kilogram one meter per second per second |
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| job of an organism in the food chain |
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| Fox eats snake >snake eats bunny> bunny eats clover |
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| theory that all land was one land mass or continent |
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| things can move through (sponge) |
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| things cannot move through (concrete) |
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| nonpoint source pollution |
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| source cannot be identified |
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| measure of mineral material contained in water |
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| importance of hardness of water |
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| stores water fro human use |
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| separation of hydrogen and oxygen |
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| changes chemically; photosynthesis |
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| changes physically; water to ice to steam |
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| distance an object travels over a period of time vs. speed and direction in same direction |
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| any force keeping an object in a circular motion; water in frisbee |
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| bad! very, very bad! chlorofluorocarbons that protect us from radiation while destroying the ozone |
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| when area becomes a desert due to a lack of rainfall |
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| deflection of water and atmosphere |
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| types of renewable energy |
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| wind, solar, water (hydro, ocean), geothermal, biomass |
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| trough, wavelength, crest, wave height |
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| potential vs. kinetic energy |
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| containing energy vs. energy in motion |
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| trapping of heat in the atmosphere |
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| hypothesis, trials, results, conclusion |
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| ozone is good thing when... |
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| keeps oxygen in the atmosphere |
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| ozone is a bad thing when... |
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| CFCs create a hole and ultraviolet rays break through the atmosphere |
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| as it nears the shore, wavelength |
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| as it nears the shore, wave height |
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| magma comes to the surface and creates new crust |
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| process by which plants create their own food |
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| needs chlorophyll, sunlight, water, carbon dioxide and nutrients |
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| fills chamber with water to sink, pumps water out (fills with air) to rise |
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| energy created by the earth, 8ft below surface constant 50 degrees |
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| industrial revolution in england tree bark turned from white to brown. moths that used to be white to blend in to habitiat of tree turned brown to camouflage themselves mutation for protection of the species |
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| atlantic ocean is becoming wider |
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