Apologia Exploring Creation with General Science Module 4
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| the goal of science | to find out why; motivated by curiosity
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| the goal of applied science | to make something better
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| technology | the invention of a new process or machine that makes life better or makes a job easier
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| simple machine* | a device that reduces the amount of force needed to perform a task or changes the direction of a force
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| force* | a push or pull that changes the motion of an object
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| lever | a rigid bar that rotates around a fixed point called a fulcrum
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| mechanical advantage* | the amount by which force or motion is magnified in a simple machine
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| first-class lever | magnifies and changes direction of the effort
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| second-class lever | magnifies but does not change direction of the effort
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| third-class lever | magnifies speed but does not magnify or change direction of the effort (effort is greater)
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| mechanical advantage of a lever = | (distance from fulcrum to effort) ÷ (distance from fulcrum to resistance)
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| diameter* | the length of a straight line that travels from one side of a circle to another, while passing through the center of the circle
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| mechanical advantage of a wheel and axle = | (diameter of the wheel) ÷ (diameter of the axle)
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| wheel and axle | a large circular wheel attached to a smaller cylinder (the axle)
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| pulley | a grooved wheel that rotates freely on a frame which is usually called a block, with a rope in the groove
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| block and tackle | a system of multiple pulleys
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| mechanical advantage of one pulley | 1
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| mechanical advantage of two pulleys | 2
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| mechanical advantage of an inclined plane, wedge, or double wedge = | (length of slope) ÷ height
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| screw | an inclined plane wrapped around the axle of a wheel and axle
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| pitch of a screw | the vertical distance between the threads
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| mechanical advantage of a screw = | circumference ÷ pitch
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| circumference* | the distance around a circle, equal to pi (approximately 3.1416) times the circle's diameter
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| pi | a number that is approximately 3.1416
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Review the information in the table. When you are ready to quiz yourself you can hide individual columns or the entire table. Then you can click on the empty cells to reveal the answer. Try to recall what will be displayed before clicking the empty cell.
To hide a column, click on the column name.
To hide the entire table, click on the "Hide All" button.
You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
To hide a column, click on the column name.
To hide the entire table, click on the "Hide All" button.
You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
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Created by:
ginnie
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