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PCS Liv Env
Nature of Matter - Chapter 2
Term | Definition |
---|---|
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 |