bonds connecting atoms in products and reactants break

bonds connecting atoms in products and reactants form

bonds connecting atoms in reactants form, and bonds connecting atoms in products break

bonds connecting atoms in reactants break, and bonds connecting atoms in products form

Ethylene is made into polyethylene, which is then molded into jugs.

Used jugs are collected, cleaned, and shredded.

Ethylene is produced from petroleum, which is extracted from the earth.

Jugs are filled with milk and sent to markets.

3

5

2

6

2, 1, 1

1, 2, 2

2, 1, 2

1, 1, 2

Energy is released by some reactions and absorbed by others

Products of a chemical reaction have different properties than the reactants.

When two reactants form one product, the reaction is spontaneous.

Reactants are more dangerous than products.

Plastics use renewable natural resources, compared with nonrenewable resources for metals

Fewer natural resources are affected by the use of plastics, compared with metal.

Plastics recycle easier so are able to reduce the use of natural resources.

Plastics use shifts natural resource use from mining lands to drilling for oil.

An aspirin tablet is crushed into a fine powder.

Water droplets form on the outside of a cold drink glass.

An antacid tablet is added to water and bubbles are produced.

Salt mixes with water and dissolves.

abundance

density

reactivity

hardness

Mg + O $\rightarrow$ MgO

Mg + O2 $\rightarrow$ MgO2

Mg + 2O $\rightarrow$ 2MgO

2Mg + O2 $\rightarrow$ 2MgO

Austin uses only physical changes to separate the mixture’s components.

Austin uses only chemical changes to separate the mixture’s components.

Austin uses both physical and chemical changes to separate the mixture’s components.

Austin uses neither physical nor chemical changes to separate the mixture’s components.

disposal

production

consumer use

distribution