Counting Significant Figures Flashcards Preview

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Flashcards in Counting Significant Figures Deck (66):
1

284

has how many significant figures?

284

Has 3 sig figs

2

28.5

has how many significant figures?

28.5

Has 3 sig figs

3

1.20

has how many significant figures?

1.20

Has 3 sig figs

4

0.719

has how many significant figures?

0.719

Has 3 sig figs

5

What is the "Mantissa" of this number?

1.25

6

0.0004

has how many significant figures?

0.0004

Has 1 sig fig

7

0.00090

has how many significant figures?

0.00090

Has 2 sig figs

8

770

has how many significant figures?

770

Has 2 sig figs

9



930,020

Which digit above is the uncertain digit?

930,020

10

0.73666

has how many significant figures?

0.73666

Has 5 sig figs

11

What is the exponent of this number?

The 3 (or the 103)

12


670.45

Which digit above is the uncertain digit?

670.45

13

80000

has how many significant figures?

80000

Has 1 sig fig

14

What is meant by the words

"The Uncertain Digit?"

The "Uncertain Digit" is usually the farthest digit on the right.

 

74.2

0.770

574

92.000 

 

 

 

15

3000

has how many significant figures?

3000

Has 1 sig fig

16

12

has how many significant figures?

12

Has 2 sig figs

17


What is the "Mantissa" of this number?

1.38502

18


.0080

Which digit above is the uncertain digit?

.0080

19

600783

has how many significant figures?

600783

Has 6 sig figs

20

559.832

has how many significant figures?

559.832

Has 6 sig figs

21

What is the "Big Digit?"

The "Big Digit" is the farthest left, non-zero, digit in a number.

 

250.9

30337

0.000344 

 

 

22

1.003

has how many significant figures?

1.003

Has 4 sig figs

23

49.924

has how many significant figures?

49.924

Has 5 sig figs

24


What is the exponent of this number?

-1 (or the 10-1)

25

37.003

has how many significant figures?

37.003

Has 5 sig figs

26

1234500

has how many significant figures?

1234500

Has 5 sig figs

27

0.012345

has how many significant figures?

0.012345

Has 5 sig figs

28

37982

has how many significant figures?

37982

Has 5 sig figs

29


If a number has a

zero with a line over it...

 

Where is the uncertain digit?

(This is an important exception to some other rules you might see on these flash cards.

The zero with the line over it is the uncertain digit.

30

0.0442

has how many significant figures?

0.0442

Has 3 sig figs

31

When a scientist writes down a number how many "uncertain digits" do they typically keep.

One

This will usually be the last digit on the right.

 

454.07

32

20

has how many significant figures?

20

Has 1 sig fig

33

55

has how many significant figures?

55

Has 2 sig figs

34

0.033

has how many significant figures?

0.033

Has 2 sig figs

35


2000

 

Which digit above is the uncertain digit?

2000

36

37.07

has how many significant figures?

37.07

Has 4 sig figs

37

3.96

has how many significant figures?

3.96

Has 3 sig figs

38

0.0308

has how many significant figures?

0.0308

Has 3 sig figs

39

When we ask

"How many digits wide is a number?"

 

What do we mean?

We mean

how many digits from the Big Digit to the Uncertain Digit.

 

This number is 5 digits wide:

 

603.04

40


You pick 3 tennis balls out of a bin.  What is the uncertainty associated with the number 3 in this case.

There is no uncertainty.

You can be sure you have "EXACTLY" 3 tennis balls. 

You counted to 3, you did not "measure" 3 tennis balls.

41

0.0020

has how many significant figures?

0.0020

Has 2 sig figs

42

25000

has how many significant figures?

25000

Has 2 sig figs

43

30

has how many significant figures?

30

Has 1 sig fig

44

930

has how many significant figures?

930

Has 2 sig figs

45

400

has how many significant figures?

400

Has 1 sig fig

46

 

.008

Which digit above is the uncertain digit?

.008

47

20.05

has how many significant figures?

20.05

Has 4 sig figs

48

1234567

has how many significant figures?

1234567

Has 7 sig figs

49

800.0008

has how many significant figures?

800.0008

Has 7 sig figs

50

1.6

has how many significant figures?

1.6

Has 2 sig figs

51

156

has how many significant figures?

156

Has 3 sig figs

52


An "EXACT NUMBER" has how many sig figs?

Unlimited

 

An exact number is not a measurement, thus, it has no uncertainty.

53

6

has how many significant figures?

6

Has 1 sig fig

54

9.82

has how many significant figures?

9.82

Has 3 sig figs

55

5988

has how many significant figures?

5988

Has 4 sig figs

56

9.7703

has how many significant figures?

9.7703

Has 5 sig figs

57

30.0004

has how many significant figures?

30.0004

Has 6 sig figs

58

0.007

has how many significant figures?

0.007

Has 1 sig fig

59

4328.9

has how many significant figures?

4328.9

Has 5 sig figs

60

81.909

has how many significant figures?

81.909

Has 5 sig figs

61

2807

has how many significant figures?

2807

Has 4 sig figs

62

2005

has how many significant figures?

2005

Has 4 sig figs

63

987.4

has how many significant figures?

987.4

Has 4 sig figs

64

48923.4

has how many significant figures?

48923.4

Has 6 sig figs

65

0.05

has how many significant figures?

0.05

Has 1 sig fig

66

0.08800

has how many significant figures?

0.08800

Has 4 sig figs