Chapter 3-1 and 3-2 vocab

Question 0

Scientific Notation

Answer 0

• A given number is written as the product of two numbers

- Uses a coefficient, power, and exponent

Question 1

Measurement

Answer 1

• A quality that has both a number and a unit

- Example: 55 inches, 2 centimeters

Question 2

Coeffient

Answer 2

• multiplied by the power and exponent

- Great than 1 and less than 10

Question 3

Exponent

Answer 3

• Above the power

- always an integer (1-, 2)

Question 4

What does a positive exponent indicate?

Answer 4

-How many times the power is multiplied by 10

Question 5

What does a negative exponent indicate?

Answer 5

-How many times the power is divided by 10

Question 6

Lars

Answer 6

• Left
• Add
• Right
• Subtract

Question 7

Accuracy

Answer 7

-A measure of how close a measurement comes to the true value

Question 8

Percision

Answer 8

-A measure of how close a series of measurements are to one another

Question 9

Accepted value

Answer 9

• The established value for a measurement based on reliable references

Question 10

Experimental value

Answer 10

-The value measured in the lab

Question 11

Error

Answer 11

-The difference between the experimental value and the accepted value

Question 12

Percent Error

Answer 12

-A measure that is the absolute value of the error divided by the accepted value then multiplied by 100%

Question 13

Significant figures

Answer 13

-All the digits that are known, plus the last digit that is estimated

Question 14

Known Measured Values

Answer 14

• Values that are known and can be seen with the eye

- Not estimated

Question 15

How to round when adding and subtracting decimals

Answer 15

• Answer should be rounded to the same number of decimals as the measurement with the least number of decimal places
• Count to right of decimal

Question 16

How to round decimals when multiplying and dividing

Answer 16

• Round the answer to the same number of significant figures as the measurement with the least number of significant figures
• Decimal point does not matter

Question 17

Formula to find error

Answer 17

-Experimental value - Accepted Value

Question 18

How to find percent error

Answer 18

• error divided by accepted value X 100 percent

Question 19

In order to have a good lab, your percent error should be equal to or below what?

Answer 19

-5%

Question 20

Rule #1 for determining sig figs

Answer 20

Every nonzero digit in a measurement is significant

Question 21

Rule 2 for determining sig figs

Answer 21

Zeros appearing between nonzero digits are significant

Question 22

Rule 3 for determining sig figs

Answer 22

• Leftmost zeros are not significant

- Act as place holders

Question 23

Rule 4 for determining sig figs

Answer 23

-Zeros at the end of number and to the right of a decimal point are always significant

Question 24

Rule 5 for determining sig figs

Answer 24

• Zeros at the rightmost end of a measurement that lie to the left of an understood decimal point are not significant if they serve as placeholder

Question 25

Rule 6 for determining sig figs

Answer 25

-If such zeros were know measured values, then they would be significant

Question 26

Rule 7 for determining sig figs

Answer 26

-Counting has an unlimited number of significant figures

Question 27

Rule 8 of determining sig figs

Answer 27

-Exact qualities have unlimited number of significant figures