Engineering Process
what a design needs to meet to be successful
criteria
When molecules rearrange to make or break bond, creating a new substance
chemical reaction
a characteristic of a substance that doesn't change
property
the starting material in a chemical reaction
reactant
this chemical reaction produced chunks of copper
cupric sulfate and aluminum foil
the best or ideal
optimal
when a chemical reaction releases energy - feel warm
exothermic
when a solid breaks apart into particles too small to see and completely mixes with a liquid
dissolve
the ending material in a chemical reaction
product
this chemical reactions was endothermic and produced a lot of foam
baking soda and vinegar
what our design cannot or should not do
constraint
when a chemical reactions absorbs energy - feel cold
endothermic
a substances ability to dissolve in a liquid
solubility
a physical model built to test and try out a design
prototype
this chemical reaction was activated when it touched air
steel wool and vinegar
entities like people, groups, or things that are impacted by design decisions
stakeholder
substance made of 2 or more elements bonded together
compound
the temperature in which food causes scald burns
160 degrees F
a homogeneous mixture made of two or more substances
solution
this chemical reaction included an indicator that (should have) changed colors
cabbage water and vinegar
when one decision directly affects another decision and you cannot do both
trade off
a group of 2 or more atoms alike or different bonded together
molecule
*Double Jeopardy*
the many possible changes that happen as a result of making a planned change
cascading consequence
a systematic series of investigations planned to answer specific questions
research
*Double Jeopardy*
what does an indicator tell you?
if something is an acid or a base depending on the color it changes to