Chapter 8 Machines
227
Finding the Meaning of Unknown Words
Before you read this chapter, skim through it briefly and identify any
words you do not know. Record these words using the Reading Target
graphic organizer at the end of the chapter. Then read the chapter
carefully. Use the context of the sentence to try to determine what each
word means. Record your guesses in the graphic organizer also. After
you read the chapter, follow the instructions with the graphic organizer
to confirm your guesses.
reading this chapter, you will be able to: After f
Identify the six simple machines.
Describe types of gears and list uses for each type.
Explain methods of applying pressure to increase or decrease effort
applied to an object.
Design and make a product that incorporates one or more
mechanisms.
Explain how friction can be reduced or overcome in a system.
friction
gear
hydraulics
inclined plane
lever
linkage
lubrication
machine
mechanical advantage
mechanism
moment
pneumatics
power
pressure
pulley
screw
torque
velocity
viscosity
wedge
wheel and axle
work
Useful Web sites:
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