Science Grade 5 Physical Chapter 1

Front 1

element

Back 1

a substance that cannot be broken down into other substances by heat, light, or electricity

Front 2

periodic table

Back 2

a chart that classifies elements by their properties

Front 3

atom

Back 3

smallest particle of an element that has the properties of the element

Front 4

nucleus

Back 4

center of an atom where protons and neutrons are located

Front 5

protons

Back 5

particle in an atom that has a positive electrical charge

Front 6

neutrons

Back 6

particle in an atom that has no charge

Front 7

electron

Back 7

particle in an atom that has a negative electrical charge

Front 8

molecule

Back 8

two or more atoms joined together-- the smallest unit of many substances

Front 9

compound

Back 9

a substance made up of atoms of more than one element joined together in a molecule

Front 10

mixture

Back 10

two or more substances that are mixed together but can be separated out because their atoms are not combined

Front 11

solution

Back 11

mixture in which substances break up into their most basic particles, which are too small to be seen and spread evenly through another substance.

Front 12

physical property

Back 12

a way of describing an object using traits that can be observed or measured without changing the substance into something else.

Front 13

physical change

Back 13

change in one or more physical properties

Front 14

chemical property

Back 14

describes the way a substance reacts with another substance

Front 15

chemical change

Back 15

change that produces new substances with new properties

Front 16

chemical reaction

Back 16

process that produces one or more substances that are different from the original substances