Chapter 8 Machines
261
1. Gears are considered an improvement
over pulleys because the teeth on a gear
prevent a belt or chain from slipping.
Why, then, are pulleys still in use today?
2. Which would work better for lubricating
a rusty lock so that a key turns in it more
easily: an oil with high, low, or medium
viscosity? Why?
1. Design and build a robotic arm that will
move an AA dry cell from one location
to another. Use syringes and tubing in
your design.
2. Design and build a mechanism that will
make a loud noise. Your solution must
contain at least two simple machines.
3. Design and build a method of measuring
the mass of a series of weights from 1 oz
(25 g) to 16 oz (500 g).
4. Consult your library or the Internet
(www.macchinedilenoardo.com) to
learn about the mechanical inventions
of Leonardo da Vinci. Which of his
mechanical inventions are somewhat
similar to the machines and vehicles
we see today? Write a technical report
explaining how innovations have been
made to his machines over time to
arrive at the products we use today.
Evaluate the innovations that have been
made. How did each innovation meet
the needs of people at the time?
5. Research green alternatives to lubricants
that are available in your area. Analyze
each option to determine its advantages
and disadvantages. Prepare a slide show
or multimedia presentation and present
it to the class to share the information
you have found.
6. Research the principles of an atomic
clock. Use library and Internet sources
to find manuals that explain how an
atomic clock works, or talk with people
who are experienced in working with or
repairing these clocks. Write a technical
report explaining how atomic clocks
work and describing any shortcomings
or features you think can be improved.
7. Research one career related to the
information you have studied in this
chapter. Create a report that states the
following:
• The occupation you selected
• The education requirements to enter
this occupation
• The possibilities for promotion to a
higher level
• What someone with this career does
on a daily basis
• The earning potential for someone
with this career
You might find this information on the
Internet or in your library. If possible,
interview a person who already works
in this field to answer the five points.
Finally, state why you might or might
not be interested in pursuing this
occupation when you finish school.
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Chapter 8 Machines
261
1. Gears are considered an improvement
over pulleys because the teeth on a gear
prevent a belt or chain from slipping.
Why, then, are pulleys still in use today?
2. Which would work better for lubricating
a rusty lock so that a key turns in it more
easily: an oil with high, low, or medium
viscosity? Why?
1. Design and build a robotic arm that will
move an AA dry cell from one location
to another. Use syringes and tubing in
your design.
2. Design and build a mechanism that will
make a loud noise. Your solution must
contain at least two simple machines.
3. Design and build a method of measuring
the mass of a series of weights from 1 oz
(25 g) to 16 oz (500 g).
4. Consult your library or the Internet
(www.macchinedilenoardo.com) to
learn about the mechanical inventions
of Leonardo da Vinci. Which of his
mechanical inventions are somewhat
similar to the machines and vehicles
we see today? Write a technical report
explaining how innovations have been
made to his machines over time to
arrive at the products we use today.
Evaluate the innovations that have been
made. How did each innovation meet
the needs of people at the time?
5. Research green alternatives to lubricants
that are available in your area. Analyze
each option to determine its advantages
and disadvantages. Prepare a slide show
or multimedia presentation and present
it to the class to share the information
you have found.
6. Research the principles of an atomic
clock. Use library and Internet sources
to find manuals that explain how an
atomic clock works, or talk with people
who are experienced in working with or
repairing these clocks. Write a technical
report explaining how atomic clocks
work and describing any shortcomings
or features you think can be improved.
7. Research one career related to the
information you have studied in this
chapter. Create a report that states the
following:
• The occupation you selected
• The education requirements to enter
this occupation
• The possibilities for promotion to a
higher level
• What someone with this career does
on a daily basis
• The earning potential for someone
with this career
You might find this information on the
Internet or in your library. If possible,
interview a person who already works
in this field to answer the five points.
Finally, state why you might or might
not be interested in pursuing this
occupation when you finish school.

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