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PCS Liv Env

Nature of Matter - Chapter 1-2

acid higher concentration of H+ ion than pure water
amino acid building blocks of proteins
carbohydrates sugars, starches; contain C, H, O; used by cells for energy
chemical bonds atoms join together to make these
compound a substance made of one or more elements in a definite proportion
dependent variable the variable that is observed and measured
element an entirely pure substance consisting of one type of atom. Each atom has an abbreviation of 1 or more letters. (on periodic chart)
excretion removing metabolic wastes
hypothesis a possible explanation for a set of observations; always a statement
independent variable the variable being changed; I change this variable
inference a logical interpretation based on prior knowledge and experience
lipids fats, oils and waxes; contain C, H, O; stores energy
nucleic acid DNA and RNA; contains CHON and phosporous; used to store and transmit hereditary information
nutrition getting and using materials from the environment
observation using your senses to gather information
organic compounds that always contain both the elements C (carbon) and H (hydrogen); make up living organisms
regulation controlling the cells activities
synthesis creating large molecules from small ones
respiration releasing energy from food molecules
atom basic unit of matter
Created by: cboula