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Chemistry 1110 > Measurements in Chemistry > Flashcards

Measurements in Chemistry Flashcards

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1
Q

Measurements are an important tool used by scientists to understand matter
True or false?

A

True

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2
Q

Does a qualitative observation use numbers

A

No, it uses senses and is expressed using words rather than numbers

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3
Q

A_______ is produced when a quantitative observation or measurement is made

A

Number

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4
Q

To completely describe a substance one or more___________ measurements must be used.

A

Quantitative

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5
Q

Measurements always have a_______ and a________.

A

Number, unit

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6
Q

Is a measurement useful without a unit?

A

No

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7
Q

True or false?
Measurements can be made using any units

A

True

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8
Q

Which system is used for scientific measurements?

A

Metric

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9
Q

What are the units for the following quantitative measurements?
22.4 liters, 55 meters, 48 minutes

A

Liters, meters, minutes

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10
Q

How many basic units are there for each type of measurement in the metric system?

A

1

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11
Q

What are the abbreviations for liter and gram?

A

L, g

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12
Q

A______ is used to indicate how smaller and larger units in the metric system relate to the basic unit

A

Prefix

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13
Q

How much smaller is a millimeter than a meter?

A

1/1,000

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14
Q

How many centigrams are there in 1g

A

100

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15
Q

True or false
There’s always an uncertainty or error associated with any measured number.

A

True

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16
Q

_________ are numbers that do not have uncertainties associated with them.

A

Exact numbers

17
Q

The measure of how closely individual measurements agree with each other

A

Precision

18
Q

How close the individual measurements are to the true value?

A

Accuracy

19
Q

The terms_______and_______are used to discuss the uncertainties in measured numbers

A

Precision, accuracy

20
Q

What does the prefix nano denote in the metric system?

A

One- Billionth

21
Q

What does the prefix micro denote in the metric system

A

One-Millionth

22
Q

What does the prefix deci denote in the metric system?

A

One-tenth

23
Q

What does the prefix kilo denote in the metric system?

A

1,000

24
Q

What does the prefix mega denote in the metric system?

A

One million

25
Q

What does the prefix giga denote in the metric system?

A

1 billion

Chemistry 1110 (4 decks)

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