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Science vocab
1.3 and 1.4 RG 15 word vocab 7-8 Brandy Ermini
15
Science
7th Grade
12/19/2011

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Term
Element
Definition
An element is any substance that cannot be broken down into simpler substances.
Term
Carbohydrate
Definition
A carbohydrateis made up of carbon, hydrogen, and oxygen. Carbohydrates give energy to the body.
Term
Lipids
Definition
Lipids contain carbon, hydrogen, and oxygen. Lipids store energy for the body
Term
Proteins
Definition
Proteins contain carbon, hydrogen, oxygen, nitrogen, and sulfur. Proteins make up most of the cell and speeed up chemical reactions.
Term
Nucleic acids
Definition
Nucleic acids contain carbon, oxygen, hydrogen, nitrogen, and phosphorus. Nucleic acids carry out the functions of life.
Term
RNA
Definition
RNA is a Ribonucleic acid that plays an important role in the production of proteins
Term
DNA
Definition
DNA is the genetic material that carries information about an organisum and is passed from parent to offspring.
Term
Enzyme
Definition
Enzymes is a type of protein that speeds up a chemical reaction in a living thing
Term
Diffusion
Definition
Diffusion is the main method by which small molecules move across the cell membrane.
Term
Selectively Permeable
Definition
Selectively permeable means that some substances can pass through the cell membrane while others can not.
Term
Omosis
Definition
Omosis is the diffusion of water molecules through a selectively permeable membrane. Because cells can not function properly without adequate water, many cellular processes depend on omosis.
Term
Passive transport
Definition
Passive transport is the movement of disolved materials through a cell membrane without using cellular energy
Term
Active transport
Definition
Active transport is the movement of materials througha cell membrane using cellular energy
Term
Amino acid
Definition
Amino acids are protein molecules made up of smaller molecules.
Term
Compound
Definition
A compound is when two or more elements combine chemically, they form a compound.
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