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PCS Liv Env

Vocabulary for Topic 9 - Laboratory Skills

TermDefinition
Balance a tool that measures mass by comparing the unknown mass of an object with an object of known mass
Chromatography a laboratory technique used to separate mixtures of molecules (Lab Hint: This is when you put enzyme drops on a piece of paper and then let the paper soak in water. You saw several different colors going up the paper.)
Compound Light Microscope a tool that uses more than one lens and a light source to magnify an object
Dichotomous Key a guide that compares pairs of observable traits to help the user identify an organism (Lab Hint: Used during the lab when you had to figure out the type of lizard or type of leaf.)
Dissection the act of cutting apart a dead organism to examine its internal structure
Electronic Balance a balance that measures mass automatically
Electrophoresis a tool that allows scientists to separate mixtures of molecules according to size (Lab Hint: This was used when comparing DNA. Remember the smaller DNA fragments move farther.)
Graduated Cylinder a tool used to measure the volume of a liquid
Indicator a substance that changes color when it encounters certain chemical conditions
Magnification the ability of a microscope to make an object appear larger
Mass a measure of the quantity of matter in an object
Metric Ruler tool used to measure the length of an object
Microscope tool that uses a lens or a combination of lenses to magnify an object (Always start on low power first)
Stain a chemical used to make cell structures more visible when viewed under a microscope
Stereoscope a microscope that use two eyepieces; often used for dissections
Triple-Bean Balance a tool, with a single pan and three bars calibrated in grams, used to measure mass
Volume the space occupied by something
Created by: Ms.Sala
 

 



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