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| a pure substance that consists entirely of one type of atom |
element |
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soccerchick138 Mon, 19 Jan 2009 21:30:32 GMT |
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| a compound that produces hydroxcide ion s in solution |
base |
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soccerchick138 Mon, 19 Jan 2009 21:30:51 GMT |
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| measurement scale that indicates the concentration fo H+ ions in a solution |
pH scale |
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soccerchick138 Mon, 19 Jan 2009 21:31:43 GMT |
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| the substance in which the solute dissolves |
solvent |
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soccerchick138 Mon, 19 Jan 2009 21:32:12 GMT |
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| mixture of two or more substances in which the molecules of the substances are evenly distributed |
solution |
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soccerchick138 Mon, 19 Jan 2009 21:32:41 GMT |
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| an attraction between molecules of different substances |
adhesion |
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soccerchick138 Mon, 19 Jan 2009 21:33:05 GMT |
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| an attraction between molecules of the same substance |
cohesion |
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soccerchick138 Mon, 19 Jan 2009 21:33:25 GMT |
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| forms when electrons are shared between atoms |
covalent bond |
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soccerchick138 Mon, 19 Jan 2009 21:33:43 GMT |
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| formed when one or more electrons are transferred from one atom to another |
ionic bond |
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soccerchick138 Mon, 19 Jan 2009 21:34:23 GMT |
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| atoms of the same element that differ in the number of neutrons they contain |
isotope |
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soccerchick138 Mon, 19 Jan 2009 21:34:44 GMT |
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| a negatively charged particle with 1/1840 mass of a proton |
electrons |
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soccerchick138 Mon, 19 Jan 2009 21:35:03 GMT |
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| positively charged particles that are located in the center of the atom |
protons |
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soccerchick138 Mon, 19 Jan 2009 21:35:22 GMT |
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| the process that releases energy by breaking down food molecules in the presence on oxygen |
cellular respiration |
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soccerchick138 Mon, 19 Jan 2009 21:35:38 GMT |
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| genetic code |
DNA |
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soccerchick138 Mon, 19 Jan 2009 21:35:57 GMT |
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| tissues, organs, and organ systems |
groups of cells/tissue/organs |
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soccerchick138 Mon, 19 Jan 2009 21:36:20 GMT |
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| individual living thing |
organism |
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soccerchick138 Mon, 19 Jan 2009 21:36:56 GMT |
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| group of organisms of one type that live in the same area |
population |
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soccerchick138 Mon, 19 Jan 2009 21:37:18 GMT |
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| populations that live together in a defined area |
community |
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soccerchick138 Mon, 19 Jan 2009 21:38:51 GMT |
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| community and its nonliving surroundings |
ecosystem |
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soccerchick138 Mon, 19 Jan 2009 21:39:22 GMT |
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| the part of Earth that contains oll ecosystems |
biosphere |
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soccerchick138 Mon, 19 Jan 2009 22:48:27 GMT |
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| grams |
weight/mass |
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soccerchick138 Mon, 19 Jan 2009 22:48:44 GMT |
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| meter |
length |
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soccerchick138 Mon, 19 Jan 2009 22:49:00 GMT |
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| seconds |
time |
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soccerchick138 Mon, 19 Jan 2009 22:49:21 GMT |
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| liter, m3 |
volume |
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soccerchick138 Mon, 19 Jan 2009 22:49:38 GMT |
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| a deciaml system of measurement whose units are based on certain physical standards and are scaled on multiples of 10 |
system of international units |
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soccerchick138 Mon, 19 Jan 2009 22:50:00 GMT |
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| hypothesis that may become so well supported that scientists consider it______ |
theory |
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soccerchick138 Mon, 19 Jan 2009 22:50:18 GMT |
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| the variable that is observed |
responding/dependant variable |
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soccerchick138 Mon, 19 Jan 2009 22:50:36 GMT |
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| the variable that is deliberatly changed |
manipulated/independant variable |
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soccerchick138 Mon, 19 Jan 2009 22:50:54 GMT |
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| the factors in an experiment that can change |
variables |
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soccerchick138 Mon, 19 Jan 2009 22:51:36 GMT |
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| whenever possible, a hypothesis should be tested by an experiment in which only one variable is changed at one time and all the other variables should be kept unchanged |
controlled experiment |
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soccerchick138 Mon, 19 Jan 2009 22:52:06 GMT |
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| involves numbers |
quanitative observations |
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soccerchick138 Mon, 19 Jan 2009 22:52:30 GMT |
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| involve characteristics that cannot be easily measured or counted |
qualitative observations |
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soccerchick138 Mon, 19 Jan 2009 22:53:07 GMT |
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| a possible explanation for a set of observations or an answer to a scientific question |
hypothesis |
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soccerchick138 Mon, 19 Jan 2009 22:53:26 GMT |
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| weak acids or bases that can react with strong acids or bases to prevent sharp, sudden changes in pH |
buffer |
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soccerchick138 Mon, 19 Jan 2009 22:53:49 GMT |
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| any compound that forms H+ ions in solution |
acid |
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soccerchick138 Mon, 19 Jan 2009 22:54:07 GMT |
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| materials that do not dissolve when placed in water but separates into pieces so small they do not settle out |
suspension |
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soccerchick138 Mon, 19 Jan 2009 22:54:34 GMT |
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| the substance that is dissolved |
solute |
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soccerchick138 Mon, 19 Jan 2009 22:54:51 GMT |
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| the smallest unit of most compounds |
molecule |
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soccerchick138 Mon, 19 Jan 2009 22:55:10 GMT |
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| a material composed of two or more elements or compounds that are physically mixed together but not chemically combined |
mixture |
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soccerchick138 Mon, 19 Jan 2009 22:55:32 GMT |
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| when molecules are close together, a slight attraction can develop between the oppositely charged regions of nearby molecules |
van der waals forces |
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soccerchick138 Mon, 19 Jan 2009 22:56:01 GMT |
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| positevly and negatively charged atoms |
ion |
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soccerchick138 Mon, 19 Jan 2009 22:58:51 GMT |
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| a substance formed by the chemical combination of two or more elements in definite proportions |
compound |
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soccerchick138 Mon, 19 Jan 2009 22:59:13 GMT |
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| strong forces bind protons together to form the nuecleus which is at the center of the atom |
nuecleus |
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soccerchick138 Mon, 19 Jan 2009 22:59:35 GMT |
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| carry no charge and make up the nuecleus along with protons |
neutrons |
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soccerchick138 Mon, 19 Jan 2009 22:59:54 GMT |
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| basic unit of matter |
atoms |
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soccerchick138 Mon, 19 Jan 2009 23:00:20 GMT |
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| allows light to pass through the specimen and use two lenese to form on image |
light microscope |
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soccerchick138 Mon, 19 Jan 2009 23:00:37 GMT |
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| two compound microscopes which focus on the same point from slightly different angles which gives a three demensional look to the specimen |
stereomicroscope |
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soccerchick138 Mon, 19 Jan 2009 23:01:51 GMT |
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| the variables taht are kept unchanged throughout the experiment |
controlled variables |
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soccerchick138 Mon, 19 Jan 2009 23:02:22 GMT |
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| the idea that life could arise form nonliving matter |
spontaneous generation |
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soccerchick138 Mon, 19 Jan 2009 23:02:47 GMT |
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| a logical interpretation based on prior knowledge and experience |
inference |
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soccerchick138 Mon, 19 Jan 2009 23:03:04 GMT |
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| the information gathered from observation |
data |
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soccerchick138 Mon, 19 Jan 2009 23:03:20 GMT |
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| involesg one or more of the sense- sight, hearing, touch, smell, and sometimes taste- to gather information |
observation |
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soccerchick138 Mon, 19 Jan 2009 23:03:51 GMT |
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| the process by which organisms keep their internal conditions relatively stable |
homeotasis |
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soccerchick138 Mon, 19 Jan 2009 23:04:12 GMT |
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| the combination of chemical reactions through which an organism builds up or breaks down materials as it carries out its life processes |
metabolism |
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soccerchick138 Mon, 19 Jan 2009 23:04:48 GMT |
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| use energy from the enviroment to fuel the assembly of simple inorganic molecules into complex molecules |
producer |
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soccerchick138 Mon, 19 Jan 2009 23:05:05 GMT |
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| organisms taht rely on other organisms for their energy and food supply |
comsumer |
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soccerchick138 Mon, 19 Jan 2009 23:05:22 GMT |
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| cells in an organism become different |
develop |
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soccerchick138 Mon, 19 Jan 2009 23:05:39 GMT |
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| increase in size |
grow |
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soccerchick138 Mon, 19 Jan 2009 23:05:54 GMT |
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| change over time |
evolve |
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soccerchick138 Mon, 19 Jan 2009 23:06:11 GMT |
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the new organism has a single parent
1. a single-celled organism divides in half to form to two new organisms
2. a portion of the of an organism splits off to form a new organism |
asexual reproduction |
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soccerchick138 Mon, 19 Jan 2009 23:06:36 GMT |
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| two cells from different parents unite to produce the first cell of the new organism |
sexual reproduction |
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soccerchick138 Mon, 19 Jan 2009 23:07:02 GMT |
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| organisms produce new organisms |
reproduction |
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soccerchick138 Mon, 19 Jan 2009 23:07:22 GMT |
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| many celled organisms |
mulicellular |
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soccerchick138 Mon, 19 Jan 2009 23:07:39 GMT |
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| single celled organism |
unicellular |
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soccerchick138 Mon, 19 Jan 2009 23:08:00 GMT |
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| collection of living matter enclosed by a barrier that separates tge cell from its surroundings |
cell |
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soccerchick138 Mon, 19 Jan 2009 23:08:24 GMT |
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| the science taht seeks to understand the living world |
Biology |
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soccerchick138 Mon, 19 Jan 2009 23:08:43 GMT |
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