Twenty First Century Science
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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| real difference | you can be sure that the difference between two mean values is real if their ranges do not overlap | molecule | two or more atoms bonded together | nitogen dioxide | a gas which causes acid rain and makes breathing problems worse
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| best estimate | the mean of a set of data | catalyst | speeds up a chemical reaction without being used up itself | carbon dioxide | a gas produces when fossil fuels are burned
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| accuracy | how close a measurement is to the true value | element | a substance made from just one type of atom | sulphur dioxide | a gas which causes acid rain
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| mean value | the average value | combustion | a chemical reaction with oxygen (burning) | methane | a gas produced by cows and rice fields which causes the greenhouse effect
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| range | difference between the highest and lowest value in a set of measurements | reactants | chemical which react together | emissions | a polluting gas given out from a chemical reaction
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| outlier | an odd measurement, very different from the rest, taht you suspect is wrong | products | new chemicals formed atthe end of a chemical reaction | primary pollutant | a harmful chemical that human activity adds directly to the atmosphere
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| hydrocarbons | a chemical made from carbon and hydrogen atoms | particulates | microscopic soot particles | atom | smallest particle of a substance
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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:
j.punter
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