MS-+Achievement+Test

Name: Total Points: Unit Test: Simple Machines

Multiple Choice: Write the letter of the best answer.
__C__ 1. The force that makes a rolling ball slow down and stop is _. A. energy B. weight C. friction

__B__ 2. When a wedge is pushed down between objects, the objects. A. press together B. move apart C. do not move.

__C__ 3. A tool with few or no moving parts that helps people do work is a. A. load B. pyramid C. simple machine

True-False: If the statement is true, put a “T” on the line, if the statement is false, put an “F” on the line.
__T__ Force is a push or pull on an object. __T__ Energy is the ability to do work. __F__ A wedge is a sloping surface used to move heavy loads up or down.

Short Answer: Fill in the blank with the correct word that best completes the sentence.

1. A __pulley__ is a wheel with a groove that a rope or wire fits into.

<span style="font-family: Arial,Helvetica,sans-serif;">2. Two or more simple machines can be combined together to make a __complex__ __machine__.

<span style="font-family: Arial,Helvetica,sans-serif;">3. A ramp is an example of __inclined__ __plane__.

===<span style="font-family: Arial,Helvetica,sans-serif;">Matching: Match each description in the first column with the correct item in the second column. Write the letter of the item on the line before the description. ===


 * __D__ A sloping surface used to move heavy loads up or down || A. wheel and axle ||
 * __E__ An object with a wide end and a pointed or sharp edge || B. lever ||
 * __B__ A stiff bar that turns on a fulcrum and is used to move heavy objects || C. screw ||
 * __A__ A wheel or set of wheels fastened to a bar or rod || D. inclined plane ||
 * __C__ An inclined plane that is wrapped around a shaft or pole || E. wedge ||

<span style="font-family: Arial,Helvetica,sans-serif;">Essay: Answer the question to the best of your ability, using 1-3 sentences.
<span style="font-family: Arial,Helvetica,sans-serif;">1. Describe in your own words what a pulley is used for. Give at least one example of a pulley. //<span style="font-family: Arial,Helvetica,sans-serif;"> (Possible Answer) A pulley is a simple machine that is used for lifting heavy objects or moving objects up and down or side to side. Some examples of pulleys include: flag poles, sailboats, clothes lines, blinds, crane. // <span style="font-family: Arial,Helvetica,sans-serif;">2. Explain how Elijah McCoy was instrumental in the evolution of simple machines. //<span style="font-family: Arial,Helvetica,sans-serif;">(Possible Answer) Elijah McCoy invented the oil cup; the oil cup is used to help lubricate the wheels of a steam engine, ultimately reducing the friction and allowing the wheel to turn more efficiently. //