building block of matter

• atom

• cell

• organelle

• tissue

Tags

NGSS.MS-PS1-1

NGSS.MS-PS1-5

compound

• pure substance formed when two or more different elements combine

• electrical attraction between two oppositely charged atoms

• center of an atom; contains neutrons and protons

• particle without a charge in an atom's nucleus

Tags

NGSS.MS-PS1-1

proton

• positively charged particle in an atom's nucleus

• particle without a charge in an atom's nucleus

• negatively charged particle that occupies space around an atom's nucleus

• pure substance composed of only one type of atom; cannot be broken down into another substance by physical or chemical means.

molecule

• compound whose atoms are held together by covalent bonds

• pure substance formed when two or more different elements combine

• atom that is negatively or positively charged because it has lost or gained one or more electrons

• negatively charged particle that occupies space around an atom's nucleus

Tags

NGSS.MS-PS1-1

attractive forces between molecules.

• van der Waals force

• molecule

• compound

• isotope

process by which atoms in substances are reorganized into different substances.

• chemical reaction

• activation energy

• substrate

• active site

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

the starting substances in a chemical reaction

• reactant

• product

• catalyst

• substrate

Tags

NGSS.HS-PS1-7

enzyme

• special proteins that are biological catalysts

• the minimum amount of energy needed for reactants to form products

• The specific location where a substrate binds on an enzyme.

• process by which atoms in substances are reorganized into different substances.

Tags

NGSS.HS-LS1-7

molecules that have an uneven distribution of charge and have oppositely charged regions.

• polar molecule

• solution

• acid

• pH

a substance in which another substance is dissolved (i.e. water)

• solvent

• solute

• acid

• base