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use of one of more of the senses-sight, hearing, touch, smell, and sometimes taste-to gather information.
possible explanation for a set of observations or possible answer to a scientific question.
factor in an experiment that a scientist purposely changes; also known as a responding variable.
factor in an experiment that a scientist wants to observe, which may change because of the manipulated variable; also known as a responding variable.
A piece of information known to be true because it has been verified by observation or measurement, NOT based on inference.
a method of investigation involving observation and theory to test scientific hypotheses
any compound of carbon and another element or a radical, covalent bonding, can be large with many atoms, associated with living things
compound made up of carbon, hydrogen, and oxygen atoms; major source of energy for the human body
A chemical reaction in which two molecules covalently bond to each other with the removal of a water molecule.
fat in which all three fatty acid chains contain the maximum possible number of hydrogen atoms
A lipid made from fatty acids that have at least one double bond between carbon atoms
any of various compounds composed of fatty acids and phosphoric acid and a nitrogenous base
macromolecule that contains carbon, hydrogen, oxygen, and nitrogen; needed by the body for growth and repair and to make up enzymes
compound with amino group (-NH2) on one end and a carboxyl group (-COOH) on the other end
monomer of nucleic acids made up of a 5-carbon sugar, a phosphate group, and a nitrogenous base
a complex carbohydrate found in many plants and used as a sweetening agent (glucose+fructose)
a monosaccharide sugar that has several forms; the form of sugar that circulates in the blood and provides the major source of energy for body tissues. When its level is low, we feel hunger.
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