- what is qualitative data

uses words to describe what is observed

what is quantitative data?

uses number to describe what is observed

- what is the difference between a scientific law and a scientific theory?

a scientific law does not state why or how the pattern happens, but only that it will happen. A theory states why or how and will never become a law

- what are the 3 branches of science? what do they do?

physical: study of matter and energy; physics and chemistry earth: the many processes that occur on earth and deep within earth life: study of all organisms and the many processes that occur in them

- what is the difference between description and an explanation?

when you describe something, you report your observations, but when you explain something you interpret your observations

- what is the difference between an independent variable and a dependent variable?

Difference: independent is what you change in an experiment to see if it effects the dependant and the dependant id the thing you change

- what factors did they think might have been the cause in the bridge collapse, then what actually was the cause?

They thought that the bridge collapsed because of an overload, but it actually collapsed because the gusset plates failed.

- whats the difference between a live load and a dead load?

Difference: live loads do not stay with it but dead loads do

- what is the scientific method in order?

Ask questions → hypothesize and predict → test hypothesis → analyze results → draw conclusions → communicate results.

- where is the point when you research?

right after you identify the problem or ask a question (you want to research before you hypothesize)

- what is a truss bridge?

Spans long distances; supported at 2 ends with triangles (or trusses) that strengthen it.

- what is a simple beam bridge?

Horizontal bridge over across 2 supporters; if too long they sag in the middle