2nd Semester Science Exam Words
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Created by:
Partyrockin on May 16, 2012
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24 terms
Terms | Definitions |
|---|---|
 respiration | the process by which cells break down simple food molecules to release the energy they contain |
| conductor | a material through which charges can easily flow |
| electrode | a metal part of an electrochemical cell, which gains or loses electrons |
| series circuit | an electric circuit with a single path |
| screw | a simple machine that is an inclined plane wrapped around a central cylinder to form a spiral |
| compound machine | a device that combines two or more simple machines |
| electric circuit | a complete, unbroken path through which electrons flow |
| voltmeter | a device used to measure voltage, or electrical potential energy difference |
| parallel circuit | an electric circuit with multiple paths |
| switch | a device that is used to open and close the circuit |
| ramp | a simple machine that is a flat, sloped surface |
| Pangaea | all of today's continents apart of one large landmass 225 million years ago |
| genotype | an organism's genetic makeup, or allele combinations |
| chlorophyll | a green pigment found in the chloroplasts of plants, algae, and some bacteria |
| fulcrum | the fixed point around which a lever pivots |
| genes | the sets of information that controls a trait; a segment of DNA on a chromosome that codes for a specific trait |
| hybrid | an organism that has two different alleles for a trait; an organism that is heterozygous for a particular trait |
| probability | a number that describes how likely it is that an event will occur |
| Punnett Square | a chart that shows all the possible combinations of alleles that can result from a genetic cross |
| homozygous | having two identical alleles for a trait |
| mutation | a change in a gene or chromosome |
| allele | the different form of a gene |
| subduction | the process by which oceanic crust sinks beneath a deep ocean trench and back into the mantle |
| heterozygous | having two different alleles for a trait |
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