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 ____