Compound machine: a combination of two or more simple machines Mini Glossary
Her You Read
force
offidency: measure of how much work put into a machine is changed
mechanical advantage: the ratio of the output fonce to the in
into useful output by the machine
machine: a device that makes doing work easier
simple machine: does work with just one movement of the machine
work: the application of a force through a distance
Review
. Review the terms in the Mini Glossary. Write one sentence using the terms efficiency and
mechanical advantage.

a rain shadow is a dry region of land on the side that is protected against the prevailing winds of a mountain range. the prevailing winds are the winds that occur most of the time in a particular place of the earth

prevailing winds carry air toward the mountain range. as the air rises up over a mountain range, the air cools, water vapor condenses, and clouds form. on this side of the mountains, called the windward side, precipitation falls in the form of  rain  or snow. this dry air produces a  rain shadow.

"record the time to complete a chemical reaction" would most likely be part of a lab procedure.

the cold front replaces the warmer air at the ground level changing the wind to be breezy and denser.there is also an immediate drop in the temperature.