the metric system, equipment & graphing chapter one
TRANSCRIPT
The Metric System, Equipment & Graphing
Chapter One
Mathematics is the Language of Science.
• Quantitative vs. Qualitative– Quantitative includes NUMBERS– Qualitative is a description – feels
cold, bubbling, strong smell
• Scientists collect data using the METRIC SYSTEM.– Can you name a country (other
than the US) that does NOT use the Metric System??
The Metric System
• Kilo (K)
• Hecto (H) Large Measurements
• Deka (Dk)– Add a BASIC UNIT to the end of each prefix, such as
Gram, Meter, Liter, Second.
• Deci (d)
• Centi (c) Small Measurements
• Milli (m)
Metric Conversions
• Scientists often have to convert from one metric measurement to another.
• Example Problem: A roll of copper wire contains 15 m of wire. What is the length of the wire in centimeters?
• To answer the problem, use the LADDER method!
The Ladder Method*See Handout*
King
Henry
Died Problem: Convert meters to centimeters.
By -Start at meters (basic unit).
Drinking -Move decimal 2 places to the right.
Chocolate
Milk
Let’s try the handout!
Chemistry Equipment*See Handout*
• There are lots of equipment that you will need to recognize in the lab.
• You will have a few days to learn these names! Then….a quiz!
Organizing Data
• Line Graphs – used to show changes in data
• Bar/Pie Graphs – used to compare data
Anatomy of a Graph• X – axis – horizontal
– The Independent Variable
• Y – axis – vertical– The Dependent Variable
• Legend – identifies lines
• Title
• Axes Labels
Clients in the 1990’s
Years
Analyzing Data• Data often has to be
calculated. These are common calculations you should be able to do:
• Mean - average• Median – middle number• Mode – most repeated number• Range – largest minus
smallest number
• Calculate the following data:
• Student A 4
• Student B 3
• Student C 3
• Student D 2
Example Problem• Mean
• Median
• Mode
• Range
• Calculate the following data:
• Student A 4
• Student B 3
• Student C 3
• Student D 2
4+3+3+2 = 12
12 / 4 = 3
3 (it falls between 4 and 2)
3 (it’s the most repeated)
4 – 2 = 2
Can you make a line graph using Microsoft Excel?
• Make a graph using the Popcorn Lab data!
• *See Handout for directions*
• Be sure to include your calculations!