4th grade Harcourt Science Unit F Ch 3 Simple Machines
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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| effort force | force you put into a simple machine
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| wedge | two inclined planes placed back-to-back
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| simple machines | basic machines that make up other machines
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| work | result of a force moving an object through a distance
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| inclined plane | flat surface that has one end higher than the other
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| fulcrum | fixed point of a lever
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| pulley | rope or chain and the wheel it fits around
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| screw | inclined plane wrapped around a pole
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| lever | bar that turns around a fixed point
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| efficiency | how well a machine changes effort into work
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| wheel and axle | large wheel attached to a smaller wheel or rod
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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.
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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:
crandolph
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