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Unit 1

Scientific Investigation and Reasoning

descriptive investigation A method of scientific exploration in which a hypothesis is not required.
comparative investigation A lab investigation that follows a plan to determine how changing one variable affects results; compares two or more things. You will manipulate a variable and form a hypothesis. Example:which shoe will hold up better on the basketball court?
experimental investigation a method of scientific exploration with a set hypothesis and controlled conditions
science An organized way of gathering and analyzing evidence about the natural and man-made world.
observation Information obtained through the senses.
inference A logical conclusion based on observations with past knowledge and experience
collect gather data
record saving data through written or technological devices
safety being protected from or unlikely to cause danger
Corrosive eating away gradually usually by chemicals (acid and bases)
Flammable Able to catch fire easily
Flush to spray or wash away
irritant a substance that causes slight inflammation or other discomfort to the body
qualitative Data in the form of words through senses
quantitative Data that is in numbers
variable A factor that can change in an experiment
independent variable a factor that can is changed or manipulated or the variable whose effect is being studied
dependent variable The outcome factor; the variable that may change in response to manipulations of another variable.
controlled variable Factor in an experiment that a scientist purposely keeps the same
controlled experiment An experiment in which only one variable is manipulated at a time.
theory A hypothesis that has been tested with a significant amount of data and is reliable
hypothesis A proposed answer to a question or a testable prediction or an educated guess
Created by: TPJH7