How to do a speech
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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| How can you identify a physical change? | You can identify a physical change if you can still identify the substance. If it retains its original identity, it is a physical change.
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| Physical change or chemical? #1 | Butter melting in a pan is Physical
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| Physical change or chemical? #2 | Salt dissolves in water Physical
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| Physical change or chemical? #3 | Paper is shredded is physical
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| Physical change or chemical? | Grass cut Physical
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| Physical change or chemical? | A candle is burned is chemical
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| Physical change or chemical? | Fireworks explode is chemical
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| Physical change or chemical? | An apple turns brown is chemical
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| In the equation Na + O2 → Na2O, what is/are the product(s)? | The compound Na2O is the only product in the reaction.
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| Why do nuclear changes require more energy than chemical changes? | To change the nucleus, you must overcome more attractive forces than in a chemical change. Nuclear changes affect the protons in the nucleus; chemical changes affect the electrons surrounding the nucleus.
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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:
Kanekixuta
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