Lesson 1
Science
is the investigation and exploration of natural events and of the new information that results from those investigations.
is a spoken or written summary of observations.
Description
Variable
is any factor that can have more than one value.
is comparing what you already know with the information you are given in order to decide whether you agree with it.
Gusset
steel plates join the triangular and vertical truss elements to the overhead roadway beams.
the results of using one or more of your senses to gather information and taking note of what occurs.
Observation
Explanation
is an interpretation of observations.
is the factor that you want to test
independent variable
Scientific Law
is a rule that describes a repeatable pattern in nature.
uses numbers to describe what is observed
Quantitative Data
Inference
is a logical explanation of an observation that is drawn from prior knowledge or experience.
the internationally accepted system of measurement
International System of Units (SI)
dependent variable
is that factor you observe or measure during an experiment.
Control group
contains the same factors the as experimental group but the independent variable is not changed.
Science journal, Balances, Thermometers, Calculators, Computers, Glassware
a possible explanation for an observation that can be tested by scientific investigations
Hypothesis
Scientific notation
a method of writing or displaying very small or very large values in a short form.
are factors in an experiment that do not change.
Constants
Scientific Theory
is an explanation of observations or events that is based on knowledge gained from many observations and investigations.
What is a truss bridge?
spans a long distance and is supported only at its two ends but assembly of interconnected triangles or trusses strengthens it.
Prediction
is a statement of what will happen next in a sequence of events.
is the expression of error as a percentage of the accepted value.
Percent error
is used to study how a change in the independent variable changes the dependent variable
experimental group
uses words to describe what is observed.
What was the name of the bridge case study?
Minneapolis Bridge Failure