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chapt 3 lesson 1&2
| Term | Definition |
|---|---|
| matter | any material that has mass and can take up space |
| atoms | the basic unit of matter |
| element | a chemical substance with a unique set of properties that cannot be broken down with other properties |
| nucleus | the central core of a atom consists of protons and neutrons |
| molecule | a combination of two or more atoms |
| compound | a substance combining atoms of two or more |
| hydrocarbons | the primary source of gasoline |
| Macromolecule | a large organic molecule; includes proteins, nucleic acids, carbohydrates, and lipids |
| proteins | an organic compound made up of carbon, |
| nucleic acids | the macromolecule that carries hereditary information; includes DNA and RNA |
| carbohydrates | an organic compound that consists of atoms of carbon, hydrogen, and oxygen |
| lipids | chemically diverse compound that does not dissolve |
| 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 a 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 |
| 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 below Earth's surface and in the atmosphere |
Created by:
TylerTheCreator2011