Significant Figures, Scientific Notation, Measurements, and the Scientific Method Flashcards

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0
Q

How many sig. figs.? 3874

A

4 sig. figs.

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1
Q

How many sig. figs.? 80.00

A

4 sig. figs.

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2
Q

How many sig. figs.? 0.0245

A

3 sig. figs.

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3
Q

How many sig. figs.? 3.207

A

4 sig. figs.

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4
Q

How many sig. figs.? 5,400

A

2 sig. figs.

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5
Q

How many sig. figs.? 4 marbles

A

unlimited sig. figs.

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6
Q

What is the rule with sig. figs. when multiplying and dividing numbers?

A

The number of sig. figs. in an answer is rounded to be the same number of sig. figs. in the number with the least amount of sig. figs.

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7
Q

What is the rule with sig. figs. when adding and subtracting numbers?

A

The number of sig. figs. in an answer is limited by the smallest number of decimal places.

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8
Q

Express 5345 in scientific notation

A

5.345 x 10^3

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9
Q

Express .005785

A

5.785 x 10^-3

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10
Q

What do you do with the exponents when multiplying in scientific notation?

A

Add the exponents.

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11
Q

What do you do when you divide in scientific notation?

A

Subtract the exponents.

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12
Q

What must be true about the exponents when adding and subtracting scientific notation?

A

The exponents must be the same. Then add the bases.

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13
Q

What two things must a measurement have?

A

It must have a number and a unit.

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14
Q

Where does a measurement go to?

A

The measurement goes to the first uncertain digit.

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15
Q

How many decimeters are in a meter?

A

10 decimeters are in a meter.

16
Q

How many centimeters are in a meter?

A

100 centimeters in a meter.

17
Q

How many meters are in a kilometer?

A

There are 1,000 meters in a kilometer.

18
Q

How many millimeters are in a meter?

A

There are 1,000 millimeters in a meter.

19
Q

How many nanometers are in a meter?

A

10^9 nanometers are in a meter.

20
Q

How many micrometers are in a meter?

A

There are 10^6 micrometers in a meter.

21
Q

How many meters are in a megameter?

A

1,000,000 meters are in a megameter.

22
Q

Measurements should have how many decimal places?

A

2 no matter what.

23
Q

What are the four main steps in the scientific method?

A

Observations, hypothesis, experiment, and a conclusion are the four main components.

24
Q

What is a theory?

A

It is a well tested explanation for a broad set of ideas.

25
Q

What is a scientific law?

A

Summarises observations and experiments