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new unit 2
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Biology
9th Grade
11/30/2010

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Term
Volume
Definition
the amount of space
Term
matter
Definition
Something that takes takes up space
Term
solid
Definition
A substance that has a fixed shape and volume
Term
Liquid
Definition
A substance that has no fixed shape but does have a fixed volume
Term
gas
Definition
A substance that has no fixed volume and no fixed shape
Term
atom
Definition
The fundamental unit of any kind of matter
Term
element
Definition
A negative charged located outside the nucleus
Term
Proton
Definition
A positive charged located in the center
Term
Neutron
Definition
A uncharged an located in the neutron
Term
electron
Definition
A negative charged located outside the nucleus
Term
ion
Definition
A charged species that results from the gain or lost of electrons
Term
Chemical Bond
Definition
A attractive force between two atoms that hold them together
Term
Covalent Bond
Definition
An attractive force between two atoms two atoms come from sharing eletrons
Term
Ionic Bond
Definition
An attractive force between two ions that comes from their opposite charges
Term
Chemical Reaction
Definition
a process that results results
Term
Reactant
Definition
A substance that is used up in a chemical reactions
Term
product
Definition
A substance re formed during chemical reactions as reagents are consumed
Term
Compound
Definition
Something created by mixing two or more thing
Term
Periodic Table
Definition
Slow chemical element
Term
Macromolecule
Definition
A gaint molecule formed by joining thousands of molecules together.
4 types : a) carbohydrate b)nucleic acid c) lipid d)proteins
Term
Carbohydrate
Definition
Mono=1
Saccharide=sugar
1 sugar
A basic unit of a carbohydrate
Term
disaccharide
Definition
2
Saccharide= sugar
Term
Nucleic acid
Definition
A compound made up of long chains of molecule that carries a code for living organism or cells
Term
nucleotide
Definition
The basic unit of a nucleic acid
Made up of: 1. phosphate group 2. sugar ring 3. Nucleotide base
Term
Lipid
Definition
A long chain of fatty acids
Term
fatty acid
Definition
The building blocks of lipid.
1. Saturated fatty acid consists of only SINGLE carbon
2. Unsaturated fatty acid consist of BOTH single and double carbon to carbon bonds
Term
Amino acid
Definition
A small, organic molecule that links with other amino acids in long chains to form proteins.
It contains an amino group, a carboxylic acid group, and a side chains
Term
enzyme
Definition
A globular protein that catalyzes(speed up) chemical reaction
Term
Amino acid
Definition
A small, organic molecule that links with other amino acids in long chains to form proteins.
It contains an amino group, a carboxylic acid group, and a side chains
Term
Acid
Definition
A long chain of fatty acids
A compound that transfers hydrogen ions to water
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