27 1/2 days - ANS-moon completes an entire revolution around the earth
acid - ANS-substance that gives up positively charged hydrogen ions(H+) when dissolved in
water
ex: vinegar, lemon juice
alcohol - ANS-substance that is readily absorbed through the walls of the stomach
alveoli - ANS-this is where the blood receives oxygen during the process of respiration
anemometer - ANS-measures the wind speed
angiosperm - ANS-produces flowers
arteries - ANS-carry blood from the heart to the tissues of the body
arthropods - ANS-invertebrates with segmented bodies and jointed legs
asteroids - ANS-a.k.a. "meteoroids", when they fall into the earth's gravitational field, they
are seen as falling stars called "meteors"
atom - ANS-smallest component of an element that still retains the properties of the element
autonomic nervous system - ANS-part of the peripheral nervous system; regulates
involuntary activities
base - ANS-substance that gives up negative charged hydroxyl ions(OH-) when dissolved in
water. tastes bitter ex: soap, baking soda
bile - ANS-produced by the liver aids in the physical digestion of emulsifying fat
biofact - ANS-object found at an archaeological site signifying that it was once a living
organism
biome - ANS-species bound together by similar climate, vegetation & animal life
biosphere - ANS-zone of planet earth where life naturally occurs, including land, water & air
cappilaries - ANS-permit the exchange of materials between the blood & the body's cells
catalysts - ANS-substance that hasten chemical reaction time without themselves
undergoing change
cellulose - ANS-main difference between plant and animal cell, component of the cell wall of
plants
cerebellum - ANS-concerned with the mascular coordination of the brain
chordata - ANS-vertebrates animals; includes man
CO2 - ANS-correct formula for dry ice
cold front - ANS-when a cold air mass meets and replaces the warm air mass
comets - ANS-sometimes called dirty snowballs or icy mudballs
commensalism - ANS-the relation between two different kinds of organisms when one
receives benefits from the other without damaging it
concave lens - ANS-one that is thicker on the edges than it is in the middle; also called
"diverging lens"
concave mirror - ANS-converging mirror
conduction - ANS-simplest method of heat transfer; it is accomplished by direct contact such
as placing your finger on a hot iron
convection - ANS-transfer of heat unevenly in a liquid or gas, lowering the density of the
heated liquid or gas, w/c causes it to rise & the cooler liquid or gas to fall