Section 2
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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| Water exerts fluid pressure on | all sides of an object
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| Pressure exerted horizontally on one side of an object is | equal to the pressure exerted on the opposite side
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| Buoyant force is not affected by | weight
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| An object in fluid will sink if | its weight is greater than the buoyant force
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| Ice cube floats on water because | it is less dense than water
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| Balloon floats with helium because | helium has one-seventh the density of air
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| Secret of how a ship floats | is its shape
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| Hollow shape increases | volume of the ship
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| (changing mass) Submarines have | ballast tanks that can be opened to allow sea water to flow in
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| Three methods to change the overall density of an object | Change shape, change mass, change volume
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| Changing volume - bony fishes have an organ called a swim bladder (inflated swim bladder increases fishes volume) that is filled with | gasses produced in the blood
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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:
jean2454
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