Numbers and Units

Numbers and Units

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Some Basic Rules for Working with Numbers

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Some Basic Rules for Working with Units

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Video Resource

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Quick Quiz

1) Read the following sentence and select the correct style for the number in it: ______________ years ago, the Earth’s rainforests were in a much better state.
2) Read the following sentence and select the correct style for the number in it: Now, due to deforestation, experts predict that up to _____________ species go extinct each year.
3) Read the following sentence and select the correct style for the number and unit in it: This means that ____________ of all species might be gone by 2065.
4) Read the following sentence and select the correct style for the number and unit in it: As a measure of how rapidly forests can be lost, logging in Amazonian Brazil rose by ________________ in just 12 months, between 2007 and 2008.
5) Read the following sentence and select the correct style for the number and unit in it: The Amazon is an example of a tropical rainforest, which means plastic water holders are filled with at least ________________ of rain each year.
6) Read the following sentence and select the correct style for the number and unit in it: Incredibly, in some years, these forests receive more than __________________ of rain.
Read the following four statements (A, B, C and D below) and rank these in order from best to worst in the way that they deal with numbers and units. Hint: Think about which of those that contain errors are more problematic than others.

A) Please pass me those 10 10 ml pipettes.
B) I need to shake the reagents within 10 after they first mixed.
C) If we wait longer, there is a 50% chance that the data will be inaccurate.
D) Inaccuracies would be a problem, especially because these results might influence a decision that affects over 600000 people.

For questions 7, 8, 9, and 10, simply input the number that indicates your ranking of this statement (1 = best, 2 = second best, 3 = second worst, 4 = worst). Hint: Only assign each ranking score once (e.g. Q7 and Q8 cannot both be ranked 1)
7) A) Please pass me those 10 10 ml pipettes.
8) B) I need to shake the reagents within 10 after they first mixed.
9) C) If we wait longer, there is a 50% chance that the data will be inaccurate.
10) D) Inaccuracies would be a problem, especially because these results might influence a decision that affects over 600000 people.
Which institution (school/college/university) are you studying at?
Which course(s) are you studying?
What point of study are you at (e.g. second-year undergraduate)?

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Numbers and Units