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Chapter 3

Vocab

TermDefinition
Matter any material that has mass and occupies space is called matter.
Atom the basic unit of matter; the smallest unit that maintains the chemical properties of an element
Element a chemical substance with a unique set of properties that cannot be broken down into substances with other properties
Nucleus The central core of an atom; consists of protons and neutrons.
Molecule a combination of two or more atoms
compound a substance combining atoms of two or more different elements.
hydrocarbons an organic compound combining hydrogen and carbon
solution a mixture in which all the ingredients are evenly distributed
macromolecules a large organic molecule; includes proteins, nucleic acids, carbohydrates, and lipids
Proteins an organic compound made up of carbon, oxygen, hydrogen, nitrogen, and sometimes sulfur.
Nucleic acids the macromolecule that carries hereditary information; includes DNA and RNA
carbohydrate an organic compound that consists of atoms of carbon, hydrogen, and oxygen
Lipids chemically diverse compound that does not dissolve in water
Ph a measure of the acidity or alkalinity (basicity) of a solution
feedback loop a circular process that describes how an event is both a cause and an effect in the same system; can be positive feedback loop or a negative feedback loop
erosion the removal of soil by water, wind, ice, or gravity
geosphere all of the rock at and below Earth's surface
lithosphere sphere of Earth made up of the hard rock on and just below Earth's surface; the outermost layer of both Earth and its geosphere
biosphere the Earth and all of its organisms and environments
atmosphere the thin layer of gases that surrounds Earth
hydrosphere all of the water- salt water and fresh water, in the form of liquid, ice, or vapor- above and in the atmosphere
Created by: rahnaemumford
 

 



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