Variables Review

Hypothesis

an educated guess about what you think will happen

Independent Variable

the variable that YOU change

Dependent Variable

the variable that you MEASURE

Controlled Variables

things that you keep the SAME

Scale

the numbers on the axes of a graph

Horizontal Axis

always put the Independent Variable here

Vertical Axis

always put the Dependent Variable here

Units

Every graph should have U___________

Graph Title

DV (units) vs. IV (units)

temperature

How does temperature affect the growth of mold? IV would be _________________________

growth of mold

How does temperature affect the growth of mold? DV would be _________________________

paper or plastic bags

Which can support more weight: paper or plastic grocery bags? IV would be ___________________

Which can support more weight: paper or plastic grocery bags? DV would be ___________________

amount of weight

organic or non-organic

Which stays fresher longer: organic or non-organic fruit? IV would be ____________________

which stays fresher longer

Which stays fresher longer: organic or non-organic fruit? DV would be ____________________

title

Every scientific graph must have a T____________

Key (or "legend")

only need this if you have more than one set of data

Growth of Mold (cm2) vs. Temperature (˚)

This would be the title of the graph if a student was testing how temperature affects growth of mold.

type of bread, temperature, placement of bread

Some controlled variables in our Mold Growth experiment

Color and Light

our next unit in Science class!