Chapter 1 Flashcards
(52 cards)
Scientific method
Identify the problem Gather data Form a hypothesis Experiment Analyze data Draw conclusions
What is science?
Organized way of using evidence to learn about the natural world.
Data?
Information gathered through the senses- taste, smell, see, hear, touch
Observations are
What you actually see
Inferences are
Conclusions based on facts you already know
Sampling…
Small part to represent the whole- has to be small and random
Hypothesis-
A proposed explanation for a set of observations. An educated statement is NOT the same as an educated guess and it can be tested.
Hypothesis’ explain
What might be true, they can lead to many predictions, and they must have the words- if and then. Cause and effect
Qualitative data
No numbers
Quantitative data
Numbers only
What action tests your hypothesis?
An experiment
Control group
Give a basis for comparison- the normal situation
Placebo
Something that is false or artificial- a sugar pill
Keeps the control group from knowing they are the control
Experimental group
Group that is actually being tested
Contains variable-
Something that causes a change in the experiment
Control and experimental groups are…
Exactly the same except for the variable
Manipulated variable (independent)
Thing I change on purpose
Responding variable(dependent)
Response to the manipulated variable change
How do you analyze data?
Through graphs and data tables
Draw conclusions…
Based on data from experiment. A. Was the hypothesis correct? B. or do we form a new hypothesis and start the process all over
Theory
A broad statement for what is thought to be true and backed by scientific evidence(experiment)
Scientific law
Theory that is considered true by the scientific community
Know the difference between a hypothesis, theory, and scientific law.
H- if, then; with no evidence.
T- statement backed by evidence
SL- theory considered true by scientific community
Graphing
Always use pencil
Always use a straight edge
Graph title
X and y title
