Ch. 01 Making measurements

Question 1

standard

Answer 1

is an absolute or primary reference or measurement

Question 2

precise

Answer 2

when several readings are close together when measuring the same value

Question 3

calibrated

Answer 3

should agree closely with a standard or agrees when a correction has been applied

Question 4

volume

Answer 4

the space occupied by an object

Question 5

meniscus

Answer 5

curved upper surface of a liquid

Question 6

displace

Answer 6

moving something to another place so water is moved out of the way (upwards) when an object is lowered into it.

Question 7

immerse

Answer 7

to cover something in a fluid (usually water) so the object is submerged

Question 8

mass

Answer 8

the quantity of matter a body is composed of; mass causes the object to resist changes in its motion and causes it to have a gravitational attraction for other objects.

Question 9

density

Answer 9

the ratio of mass to volume for a substance

Question 10

weight

Answer 10

the downward force of gravity that acts on an object because of its mass.

Question 11

parallax error

Answer 11

line of site must be perpendicular to the object.

Question 12

analogue

Answer 12

the display has hands (or a needle) and is often not very precise

Question 13

digital

Answer 13

the display shows numbers and is often precise

Question 14

plumb bob

Answer 14

a mass (usually lead) hanging from a string to define a verticle line.

Question 15

oscillation

Answer 15

is a periodic motion about a central position or state

Question 16

period

Answer 16

the time for one complete oscillation or wave; the time it takes an object to return to its original position.

Question 17

Periodic motion

Answer 17

is a movement that repeats in equal intervals of time.

Question 18

amplitude

Answer 18

displacement from a position of rest

Question 19

frequency

Answer 19

the number or oscillation per second. f = 1 ∕ T