Measurement-a way to describe the world with numbers
How much, how long, how far, volume, mass, how fast, weight, how wide.
Estimation-rough measurement of an object
You use your knowledge of the size of something familiar to estimate the size of a new object.
EX. Horses were measured with hand width
Fabric was measured from tip of nose to tip of fingers
Estimation can also be used to see if an answer is reasonable. Run the 400m dash in 20 sec?
Precision-description of how close measurements are to each other
Ex. A clock with a second hand is more precise than a clock with just an hour hand.
Accuracy-when you compare a measurement to the real, actual, or accepted value
(Pg. 46 to show the difference between accuracy and precision)
Chapter 2 section 2:
SI units-International System of Units-scientists established these units to avoid confusion, it is a world wide standard of measurement
King Henry Died Drinking Chocolate Milk
Kilo Hecto Deca Deci Centi Mili
Base
Length-distance between two points
Meter stick in meters, centimeters, millimeters
Volume-the amount of space an object occupies
Meter stick-length x width x height=m3
Liquid volume-liters, milliliters
Mass-measures the amount of matter in an object
Weight-measurement of the force of gravity
Temperature-measure of kinetic energy or energy of motion, of the particles that make up matter
Time-the interval between two events
Rate-the amount of change of one measurement in a given amount of time
Mass never changes when you change locations, weight changes depending on the gravity in your location.
Chapter 2 Section 3:
Fill in the Blanks!!
______________________-can show you things you can't see, details, helps you picture images.
____________________-show objects exactly as they are at a single moment in time.
_______________-displays information in rows and columns so its easier to read and understand.
____________________-used to collect, organize, and summarize data in a visual way.
Three types of graphs:
1.__________ ___________-shows the relationship between two variables.
2. ________ __________-uses rectangular blocks or bars of varying sizes to show the relationships among variables.
3. ___________ _________-shows the parts of a whole also called pie graph.
360o=whole pie
180o=1/2 pie
90o=1/4 pie