Science Vocabulary Study Guide- Matter & Chemical Change
Atom- the smallest unit of an element that has the properties of the element
Molecule-a group of two or more atoms that are joined chemically
Element- a substance made of only one kind of atom
Change of State- a physical change that occurs when matter changes from one state to another, such as from a liquid to a gas
Physical Change- a change in which a substance remains the same substance
Mixture- a combination of two or more different substances
Physical Property –a trait –such as color, shape, or hardness, that describes a substance by itself
Chemical Property- a property that involves the ability of a substance to react with other materials to form new substances
Chemical Reaction – a change in which one or more new substances are formed
Compound- a substance made of two or more different elements
Law of Conservation of Mass- the mass of the products of a chemical reaction equals the mass of the reaction.
Balance- a tool that measures an object’s mass
Matter- is what all objects are made of, it is anything that has mass & takes up space.
Mass – is the amount of matter that is in an object.
Length- is the distance between two points
Weight – is the force of gravity between Earth & an object
Solid- a form of matter that has a definite shape & takes up a definite amount of space
Solubility- the ability of a substance to be dissolved by another substance
Solute- a substance that is dissolved by another substance to form a solution
Solution- a mixture of substance that are blended so completely that the mixture looks the same everywhere
Solvent- a substance that dissolves one or more other substances to form a solution
Property- a characteristic of matter that can be observed, such as mass, volume, weight, or density
Volume- a measure of how much space an object takes up space
Neutron- a particle in the nucleus of an atom that has no net electrical charge
Gas- a form of matter that does not take up a definite amount of space &has no definite shape
Electron- a particle in the space outside the nucleus of an atom that carries one unit of negative electric charge
Density- a measure of how tightly packed the matter in an object is