Post on 25-Mar-2022
Introduction
Reference Table Page 1
Much of the information from this chapter is found on Page 1 in the Reference Table
Tuesday, January 5, 2010
Introduction
Observation
Interaction with the environment with your senses
Taste Smell Touch Hear See Example: This rock is black and shiny
Tuesday, January 5, 2010
Introduction
Instruments
Makes observations more reliable and accurate. They extend all 5 senses Examples: Ruler, graduated
cylinder, balance, etc.
Tuesday, January 5, 2010
Introduction
Inference
An interpretation of your observations Can be a conclusion or
explanation Example: This rock formed 10
million years ago
Tuesday, January 5, 2010
Introduction
Prediction
An inference regarding the future
A weather forecast is an example
Tuesday, January 5, 2010
Introduction
Classification
To organize data based on observable characteristics or common properties Animals are classified by fur,
feathers, scales, etc.
Tuesday, January 5, 2010
Introduction
Measurements
Describes observations using numbers Always has a unit
Basic (g, cm, mm, inches) Derived-Combination
(g/cm3, m/hr) Round to the TENTHS place!!!
Tuesday, January 5, 2010
Introduction
Percent Deviation
Measures how much you messed up a calculation Remember to put Accepted in
Denominator!!!!!!
Diff. b/w Accepted and Measured Value X 100%Accepted Value
Tuesday, January 5, 2010
Introduction
Graphs Provides the observer a visual
representation of data Direct Indirect Static Cyclic
Tuesday, January 5, 2010
Introduction
Graphs
Look at the Slope of Line... Steep Slope-Fast Change Gentle Slope-Slow Change
Tuesday, January 5, 2010
Introduction
Direct
As Independent Variable Increases, Dependent Variable IncreasesAs Latitude Increases, The Altitude of Polaris
Increases
Tuesday, January 5, 2010
Introduction
Indirect
As Independent Variable increases, Dependent Variable decreasesAs distance decreases between the Earth and Sun,
Gravity Increases between them
Tuesday, January 5, 2010
Introduction
StaticAs Independent Variable Increases, Dependent Variable
stays the sameDensity stays the same regardless of size and shape of
uniform substance
Tuesday, January 5, 2010
Introduction
How to determine
VolumeRegular sided objects:
V=L x W x H
Irregular objects: Water Displacement
Tuesday, January 5, 2010
Introduction
Density
How much material is contained in a certain amount of space
V
M
D
Tuesday, January 5, 2010
Introduction
Density (more)
D = Mass / Volume V = Mass / Density M = Density x Volume
The more dense something is, the more it is going to weigh...the heavier it will feel
Tuesday, January 5, 2010
Introduction
Mass vs. Weight
Mass is the amount of matter crammed into an objectWeight is the gravitational pull
on the matter
Tuesday, January 5, 2010
Introduction
Density and size/shape of object
Regardless of size and shape, substances of same material will have the same density!
Tuesday, January 5, 2010
Introduction
Water and Density
Most substances are most dense in the solid phase But water is the exception Liquid Water-Most Dense Solid Water (ice)-Middle Density Gas Water (Water Vapor)-Least
Dense
Tuesday, January 5, 2010
Introduction
Water and Density (more)
Water is most dense in the Liquid phase at 4 degrees C.
Density of water is 1.0g/cm3 Density greater than 1.0 will sink Density less than 1.0 will float
Tuesday, January 5, 2010
Introduction
Density and Pressure
As Pressure Increases, Density Increases...Direct Relationship
Tuesday, January 5, 2010