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Chapter 3 Lesson 1,2

Vocabulary

TermDefinition
Matter All material in the universe that mass and occupies space
Atoms Are the basic units of matter
Element Is a chemical substance with a given set of properties that cannot be broken down into substances with other properties
Nucleus The central core, containing particles called protons and neutrons
Molecule Is a combination of two or more atoms of the same type or of different types joined by covalent bonds.
Compound A substance composed of atoms of two or more different elements
Hydrocarbons Are organic compounds containing only hydrogen and carbon
Solution A mixture in which all the ingredients are evenly distributed
Macromolecules Proteins, nucleic acids, carbohydrates, and lapids
Proteins Are polymers that serve many functions in organisms
Nucleic Acids Are macromolecules that direct protein production
Carbohydrates Are polymers that consist of atoms of carbon, hydrogen, and oxygen
Lipids are a chemically diverse group of macromolecules that are classified together because they do not dissolve in water
PH The acidity or alkalinity of a solution
Feedback Loop Sometimes an event is both a cause, or input, and an effect, or output, in the same system, a cyclical process
Erosion The removal of soil by water, wind, ice, or gravity, can lead to a positive feedback loop
Geosphere Is made of all the rock at and below Earth's surface
Lithosphere Is the hard rock on and just below Earth's surface-the outermost layer of the geosphere
Biosphere Consists of all the planet's living or once-living things and the nonliving parts of the environment with they interact
Atmosphere Consists of the layers of gases surrounding our planet
Hydrosphere Encompasses all water-salt, fresh, liquid, ice, and vapor-on Earth's surface, under ground, and in the atmosphere
Created by: user-1863746
 

 



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