Biology, Prentice Hall Chapter 4 Vocab

Front 1

Matter Bio Chap 4

Back 1

Anything that occupies space and has mass Bio Chap 4

Front 2

Element Bio Chap 4

Back 2

A pure substance that can not be broken down into other subsatnces. Bio Chap 4

Front 3

Trace Element Bio Chap 4

Back 3

elements that make up less than 0.01% of your body Bio Chap 4

Front 4

Compound Bio Chap 4

Back 4

A substance containing two or more elements that are chemically combined in a fixed ratio Bio Chap 4

Front 5

Atom Bio Chap 4

Back 5

The smallest part of an element Bio Chap 4

Front 6

Proton Bio Chap 4

Back 6

positively charged particle Bio Chap 4

Front 7

Electron Bio Chap 4

Back 7

Negatively charged particle Bio Chap 4

Front 8

Neutron Bio Chap 4

Back 8

Neutrally charged particle Bio Chap 4

Front 9

Nucleus Bio Chap 4

Back 9

A Central core Bio Chap 4

Front 10

Atomic Number Bio Chap 4

Back 10

The number of protons in that specific element Bio Chap 4

Front 11

Isotope Bio Chap 4

Back 11

An alterenate form of an element Bio Chap 4

Front 12

Radioactive Isotope Bio Chap 4

Back 12

A decaying particle that gives off radioacticve energy in the form of energy and mass Bio Chap 4

Front 13

Ionic Bond Bio Chap 4

Back 13

Occurs when an atom transfers an electron to another atom. Bio Chap 4

Front 14

Ion Bio Chap 4

Back 14

Groups of atoms Bio Chap 4

Front 15

Covalent Bond Bio Chap 4

Back 15

When two atoms share electrons Bio Chap 4

Front 16

Molecule Bio Chap 4

Back 16

Two or more atoms held together by covalent bonds Bio Chap 4

Front 17

Chemical Reaction Bio Chap 4

Back 17

When a chemicla bond creates a new substance Bio Chap 4

Front 18

Reactant Bio Chap 4

Back 18

The starting materials for a reacion Bio Chap 4

Front 19

Product Bio Chap 4

Back 19

End result of the combination of reactants Bio Chap 4

Front 20

Polar Molecule Bio Chap 4

Back 20

A molecule in which opposite ends have opposite electric charges Bio Chap 4

Front 21

Hydrogen bond Bio Chap 4

Back 21

weak attraction between the hydrogen atom of one molecule and a slightly negative within another molecule Bio Chap 4

Front 22

cohesion Bio Chap 4

Back 22

The tendency for molecules to stick together Bio Chap 4

Front 23

adhesion Bio Chap 4

Back 23

An attraction of water and unlike molecules Bio Chap 4

Front 24

thermal energy Bio Chap 4

Back 24

the total amount of energy associated with the random movement of atoms and molecules in a sample of matter Bio Chap 4

Front 25

temperature Bio Chap 4

Back 25

A measure of the average energy of ranom motion of the paricles in a substance. Bio Chap 4

Front 26

solution Bio Chap 4

Back 26

A uniform mixture of two or more substances Bio Chap 4

Front 27

solvent Bio Chap 4

Back 27

Substance that disolves another Bio Chap 4

Front 28

Solute Bio Chap 4

Back 28

The sobstance that is dissolved Bio Chap 4

Front 29

aqueous solution Bio Chap 4

Back 29

When water is the solvent Bio Chap 4

Front 30

acid Bio Chap 4

Back 30

A compound that donates H+ ions to a solution Bio Chap 4

Front 31

Base Bio Chap 4

Back 31

A compound that removes H+ ions from a solution Bio Chap 4

Front 32

pH Scale Bio Chap 4

Back 32

describes how acidic or basic a solution is Bio Chap 4

Front 33

Buffer Bio Chap 4

Back 33

Substances that resist change in pH content Bio Chap 4