mrs fontenot case study quiz
independent variable
A factor in experiment that can have more than one value is called a
trusses
A truss bridge is supported only at it's to ends but is strengthened by an assembly of interconnected triangles or ____
controlled experiment
A type of scientific investigation that test how one factor affects another is called a ___
beam bridge
The simplest type of bridge is called a __ __, has one horizontal beam across 2 supports
quantitive data
The use of numbers to describe what is observed is called ____
dead load
a ___ is a force applied to a structure from the structure itself
over loaded
after through modeling and Analysis, investigators ruled out the idea that the bridge failed due to being ___
Constants
all the factors in an experiment that do not change are called ___
variable
any factor in an experiment that can have more than one value is called a
damaged
evaluating why the collapse occurred was difficult because emergency workers unintentionally ___ the bridge
scientific inquiry
in order for investigators to determine why the bridge failed they needed to use many parts of ___
gusset plates
inspection of recoverd _____ showed that some of the plates failed very early in the collapse
calculation
investigators could not determine if undersize gusset plates or use because of a mistaken ____ or some other error in the design process
possessions
investigators eventually recovered the entire structure and placed the various pieces in there relative original ___
video
investigators for more clues in a ____ from a motion activated security camera
collapsed
investigators studied various questions to determine why the bridge ____ or if a combination of factors cause the bridge to fall
long
one disadvantage of beam Bridges is that they tend to sag in the middle it there too___
live load
temporary Loads to a structure such as traffic, wind gust, or earthquakes are called ___
bridge
the center section of the interstate-35W (i-35W) ___ in the north Minneapolis, Minnesota suddenly gave way on August 1, 2007
Truss bridge
the i-35W bridge was a ____ designed in the early 1960s
qualitative data
uses words to describe what is observed
node
The area where the truss structure connects to the roadway portion of the bridge gusset plate is called a __
Gusset plates
The beams in the bridges deck in the triangular and vertical supports came together as structures know as ___ ___
dependant variable
The factor scientists observed or measured during experiment is called the ____
engineering
The failure of the bridge was a surprise because the design and ___ processes that bridges undergo supposed to ensure that bridges failures do not happen
Control group
The group that contains the same factors as the experimental group but the independent variable does not change is called the
experimental group
The part of controlled experiment used to study relationships among variables is the ____
