1 - Measurements

Question 1

A comparison between a known or standard quantity vs. an unknown quantity.

Answer 1

Measurements

Question 2

This is a figure formed by two rays or lines sharing a common endpoint.

Answer 2

Angle

Question 3

The word angle came from the word ________, meaning _______.

Answer 3

Angulus, corner

Question 4

What do you call two rays of an angle?

Answer 4

Sides

Question 5

This is a common endpoint of two rays

Answer 5

Vertex

Question 6

How many letters can be used in labelling an angle?

Answer 6

3

Question 7

Angles can be measured positively (counterclockwise) or negatively (clockwise) if examined from a ___________.

Answer 7

Line

Question 8

What type of angle goes in a counterclockwise direction?

Answer 8

Positive angle

Question 9

What type of angle goes in a clockwise direction?

Answer 9

Negative angle

Question 10

An angle less than 90°

Answer 10

Acute angle

Question 11

An angle at exactly 90°

Answer 11

Right angle

Question 12

An angle greater than 90° but less than 180°

Answer 12

Obtuse angle

Question 13

An angle at exactly 180°

Answer 13

Straight angle

Question 14

An angle greater than 180° but less than 360°

Answer 14

Reflex angle

Question 15

Measuring exactly 360°; a full circle

Answer 15

Full angle

Question 16

Considered as uncertainties in measurement, occurring in two types

Answer 16

Errors

Question 17

An error caused by an instrument or a measuring technique

Answer 17

Systematic error

Question 18

This is a chance difference between the observed measurement and the actual value of a physical quantity

Can also occur in two types: environmental and observational

Answer 18

Random error

Question 19

A kind of random error that involves a differing measurement from the actual value due to a misread by the observer (lower meniscus)

Answer 19

Parallax error

Question 20

Refers to how close a measurement is to the true or accepted value

Answer 20

Accuracy

Question 21

Refers to how close measurements of the same item are to each other

Answer 21

Precision

Question 22

Data measurements are NOT exact values because of the limitations in the measuring instrument and the observer’s skill in making the instrument.

Answer 22

True

Question 23

Inclusion of all known digits and one digit that is estimated to introduce uncertainty

Answer 23

Significant figures

Question 24

S/NS: All nonzero digits are _________ .

Answer 24

S

Question 25

T/F: Since exact numbers have an infinite number of figures, they do not have any certainty.

Answer 25

True

Question 26

T/F: In every measurement, errors exist.

Answer 26

True

Question 27

A ratio of the uncertainty to the measured quantity.

Answer 27

Relative uncertainty

Question 28

Calculated to quantitatively describe errors in the measurement or deviation from the actual or true value.

Answer 28

Percent deviation, Percent error

Question 29

How the precision of a measurement can be determined.

Answer 29

Percent difference

Question 30

2 reasons why sigfigs are important so that the precision of a value does not exceed either

Answer 30

Precision of the equipment used to obtain it

The least precise number used in a calculation