Matter

True of False: A mixture is always made up of a combination of elements

False

True or False: An element can be broken down into a simpler substance.

False

Heterogeneous material

Wood, Lucky Charms, dirt, pizza, milk

In a compound the (atoms/molecules) are (chemically/physically) combined so that the elements that make up the compound (retain/lose) their identities and (do/do not) take on a new set of properties.

atom, chemically, lose, do

Homogeneous material

black coffee, water, salt, air, gold

How to separate sugar and water in solution

boil, water leaves sugar behind

chemical properties

burns easily, not affected by acids, reacts badly with chlorine

In a mixture the substances involved (can/cannot) be separated by a simple physical process.

can

In a compound the elements involved (can/cannot) be separated by a simple physical process because the elements are (physically combined/chemically bonded).

cannot, chemically bonded

Examples of compounds

carbon dioxide, alcohol, water, sugar, salt

Compound examples

carbon dioxide, water, sulfuric acid, a pencil

Physical properties

color, density, boiling point, good conductor of heat, dissolves easily in water, melting point, malleable

How to separate alcohol and water

different boiling points, boil one away

Chemical changes

dissolving zinc in acid, combusting gasoline, making hydrogen from water

The smallest identifiable unit of a compound is a(n) _______,which is made up of ________ which are chemically bonded.

element, atoms

Physical changes

grinding chalk into powder, dissolving salt in water, tearing a piece of paper, stretching copper into wire, hammering gold into foil, melting ice

A mixture (is/is not) a chemical combining of substances

is not

Chemical changes

pancakes cook, milk sours, paper burns, food is digested, grass grows

heterogeneous mixture

raisin, bread, an orange

In a mixture, the substances (lose/ retain) their identities

retain

Physical changes

salt dissolves in water, copper cut in half, sugar cube ground up, water changes to steam, ethyl alcohol evaporates, clouds form in the sky

Examples of elements

silver, chromium, hydrogen, carbon, nitrogen, oxygen, gold, magnesium, nickel, sulfur

How to separate sand and water

use a filter, water passes through

Examples of pure substances

water, mercury, sugar, oxygen, grain alcohol, gold

solution examples

water/ instant coffee, air, gasoline

Examples of mixtures

wood, air, gasoline, salt water