1.
How many significant figures are in: 3.10e23 cm
Explanation
OCEAN METHOD explanation: Decimal is PRESENT - so PACIFIC OCEAN (left side of number) - find the first number that is not a zero, it is a (3) - once it is found that number is significant and everything after it is also significant
RULES METHOD explanation: Rule 4) Trailing zeros are only significant if there is a decimal
2.
How many significant figures are in: 0.0058 cm
Explanation
OCEAN METHOD explanation: Decimal is PRESENT - so PACIFIC OCEAN (left side of number) - find the first number that is not a zero (5) - once it is found that number is significant and everything after it is also significant
RULES METHOD explanation: RULE 3) Leading zeros are never significant
3.
How many significant figures are in: 1.4500 cm
Explanation
OCEAN METHOD explanation: Decimal is ABSENT - so Atlantic OCEAN (right side of number) - find the first number that is not a zero, it is a (5) - once it is found that number is significant and everything after it is also significant
RULES METHOD: Trailing zeros are only significant if there is a decimal.
RULE METHOD explanation: RULE 4) Trailing zeros are only significant if there is a decimal
4.
How many significant figures are in: 7.108e2 cm
Explanation
OCEAN METHOD: Decimal is ABSENT - so Atlantic OCEAN (right side of number) - find the first number that is not a zero, it is an (8) - once it is found that number is significant and everything after it is also significant
RULES METHOD: Zeros sandwiched between numbers 1 thru 9 are significant.
RULES METHOD: RULE 2) Zeros smashed between 1-9 are significant.
5.
How many significant figures are in: 14.6 cm
Explanation
OCEAN METHOD explaination: Decimal is PRESENT - so PACIFIC OCEAN (left side of number) - find the first number that is not a zero, it is a (1) - once it is found that number is significant and everything after it is also significant
RULES METHOD explaination: The numbers 1 thru 9 are always significant
RULES METHOD: RULE 1) Numbers 1,2,3,4,5,6,7,8,9 are ALWAYS significant.
6.
How many sig figs are in the measurement 100 miles?
Explanation
OCEANS explanation: the decimcal if absent, so start on the Atlantic ocean side and find your first number that is a 1,2,3,4,5,6,7,8,9. The 1 is the only number that qualifies.
RULES explanation: Trailing zeros are only significant if there is a decimal. No decimal, so those 2 zeros are not significant.
7.
There are 512 students enrolled at Bushland HS. How many sig figs are in that number?
Explanation
Sig figs are only in measurements. You can count students, counting is NOT a measurement.
8.
Only __________ have sig figs?
Explanation
Sig figs, or significant figures, are a way to indicate the precision or accuracy of a measurement. They are used to show the number of reliable digits in a measurement. Therefore, only measurements have significant figures, as they are the values that are being measured and have a certain level of precision associated with them. Other types of data or information may not have sig figs as they may not involve measurements or quantifiable values.
9.
Which measurement has 6 sig figs?
Correct Answer
C. 5.47832 centimeters
Explanation
The question says find the measurement with 6 sig figs. The number of people is not a measurement. It is a counting number.
10.
There are 420 apples on the apple tree. 420 apples has 2 sig figs.
Correct Answer
B. False
Explanation
Only measurements have sig figs. 420 apples has NO sig figs because it is NOT a measurement. Things you can count do NOT have sig figs. Counting is not a measurement
11.
Find all numbers with no sig figs.
Correct Answer(s)
C. 2.3e1 atoms
E. 0.10 cents
Explanation
Only measurements have sig figs. Atoms and cents are not measurements, therefore do not have sig figs.