1. What is a compound machine? Section 5-6

2. Compound Machines Machines that combine two or more simple machines. Most machines you use every day. They do more complicated jobs and have a large MA dependent upon the MA of all of the simple machines.

3. Examples Scissors Bicycle

4. People and machines Machines have been used for thousands of years. 1. Early humans used simple tools 2. Agricultural societies used machines to water their crops, crush grain and cut wood 3. Steam power replaced horse power during the Industrial Revolution as a source of energy for machines. Today fossil fuels and nuclear power are energy sources.

5. H.W. p. 87 check/apply 1-7 wkst. 5-6 simple machines lab pgs. 88-90 reading critically, critical thinking, interpreting a diagram.

6. Ch. Review unit 5 tech term rev. enrichment wkst. 20 pgs. 88-89 matching, definitions, m/c, completion.