8th Science MCT2 terms- set 1
About this set
Created by:
mgwoodruff on March 15, 2011
Classes:
LBMS MCT2 Study Sets, LBMS 8th science, Melanie Jones, Long Beach Middle School
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30 terms
Terms | Definitions |
|---|---|
 abiotic factor | a nonliving part of an ecosystem |
| acceleration | the rate of change in an object's speed, direction, or both |
| acid | a substance that releases hydrogen ions (H +) in solution |
| adaptation | any characteristic of an organism that helps it survive in a certain environment |
| air mass | a large volume of air with about the same temperature and humidity throughout |
| air pressure | the weight of the air pressing at a given location |
| alleles | different forms of the same gene |
| anemometer | a tool used to measure wind speed |
| antibiotic | a substance used to kill bacteria that cause disease |
| asthenosphere | the soft layer within the mantle that flows like a very thick liquid |
| atmosphere | the mass of gases that surrounds Earth |
| atom | the smallest particle of an element that retains all the properties of that element |
| atomic mass | the mass of one atom of an element, equal to the number of protons and neutrons in the atom |
| atomic number | the number of protons in the nucleus of one atom of an element |
| axis | an imaginary line that runs through the center of a planet from one pole to the other |
| bacteria | (singular bacterium) single¬celled organisms that do not have a nucleus |
| balanced equation | a chemical equation that shows the same number of atoms of each element on each side of the equation |
| barometer | a tool used to measure air pressure |
| base | a substance that releases hydroxide ions (OH -) in solution |
| big bang theory | the theory of the origin of the universe which holds that all matter and energy were once compacted in a tiny particle smaller than a piece of dust, which suddenly started to expand |
| biome | a large group of ecosystems that have similar climates and organisms |
| biotechnology | the manipulation of living things, such as by changing their genetic information, to make useful products |
| biotic factor | a living part of an ecosystem |
| black hole | a region of space in which gravity is so strong that nothing can escape its pull |
| carbon cycle | the continuous movement of carbon between living things and the environment |
| cell | the smallest unit of life that tarries out all the functions of a living, thing |
| trait | an characteristic of an organism |
| transformer | a device that increases or decreases electric voltage |
| trophic level | the feeding level of an organism |
| tropical zone | the climate zone closest to the equator |
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