Review all the vocabulary from the 1st semester.
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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| atoms | basic unit of a chemical element
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| elements | a substance that cannot be broken down by chemical mean
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| nucleus | The core or the central part around which other parts are grouped or gathered.
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| electron shells | a grouping of electrons surrounding the nucleus of an atom
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| protons | a stable subatomic particle with a positive charge
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| neutrons | a subatomic particle of about the same mass as a proton but without an electric charge
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| electrons | a stable subatomic particle with a charge of negative electricity
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| atomic number | the number of protons in the nucleus of an atom
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| atomic mass | the mass of an atom of a chemical element expressed in atomic mass units, equal amount to protons and neutrons.
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| valance electrons | the outer shell of an atom which can combine with other atoms to form molecules
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| speed | refers to "how fast an object is moving."
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| velocity | refers to "the rate at which an object changes its position."
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| acceleration | increase in the rate or speed of something
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| force | a push or a pull, strength or energy as an attribute of physical action or movement
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| balanced force | the forces pushing (or pulling) an object in one direction are the same size as the forces acting in the opposite direction.
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| unbalanced force | refers to a force that together can equal a certain number and will make a change of the object's motion.
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| direction | a course along which someone or something moves.
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| Newton's 1st law | an object at rest stays at rest. an object in motion stays in motion unless force is acted upon it.
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| Newton's 2nd law | sum of the forces on an object is equal to the total mass of that object multiplied by the acceleration of the object
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| Newton's 3rd law | a force equal in magnitude and opposite in direction to that of the first body.
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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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