Post on 31-Dec-2015
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Science and MeasurementScience and Measurement
Chapter 1.2The Foundations of Physical Science
Chapter 1.2The Foundations of Physical Science
Time in ScienceTime in Science
Time is used in two waysOne way is to identify a particular moment in the past or future
It is just a time of day This is the way “time” is used in everyday conversation
The second way is to describe a quantity of time
“How much time?” A time interval is also a quantity of time
Any calculation that you do will involve time intervals not time of day
Time is used in two waysOne way is to identify a particular moment in the past or future
It is just a time of day This is the way “time” is used in everyday conversation
The second way is to describe a quantity of time
“How much time?” A time interval is also a quantity of time
Any calculation that you do will involve time intervals not time of day
Time in secondsTime in seconds
Many problems in science use time in seconds
For calculations, you may need to convert hours and minutes into seconds
Many problems in science use time in seconds
For calculations, you may need to convert hours and minutes into seconds
How many seconds is this time interval? CONVERT ALL TO SECONDS
2 hr x 60 min x 60 sec = 7200 sec
1 hr 1 min
How many seconds is this time interval? How many seconds is this time interval?
CONVERT ALL TO SECONDS
HOURS: 2 hr x 60 min x 60 sec = 7200 sec
1 hr 1 min
MINUTES: 30 min x 60 sec = 1800 sec
1 min
SECONDS: 45 sec
NOW---ADD THEM ALL UP!!!!
7200 sec + 1800 sec + 45 sec = 9,045 seconds
CONVERT ALL TO SECONDS
HOURS: 2 hr x 60 min x 60 sec = 7200 sec
1 hr 1 min
MINUTES: 30 min x 60 sec = 1800 sec
1 min
SECONDS: 45 sec
NOW---ADD THEM ALL UP!!!!
7200 sec + 1800 sec + 45 sec = 9,045 seconds
DistanceDistance
Distance is the amount of space between two points
Distance is measured in units of length
The English system uses inches, yards, feet, miles
The SI basic distance unit is the meter Prefixes are added to the name to describe very large or small measurements
Distance is the amount of space between two points
Distance is measured in units of length
The English system uses inches, yards, feet, miles
The SI basic distance unit is the meter Prefixes are added to the name to describe very large or small measurements
Meter PrefixesMeter Prefixes
Prefixes are added to the names of basic SI units such as meter, liter and gram.
Prefixes describe very small or large measurements.
Prefixes are added to the names of basic SI units such as meter, liter and gram.
Prefixes describe very small or large measurements.