Sci. Method Steps
The use of your senses to gather quantitative or qualitative information
observation
Quantitative observations involve the use of
numbers
this group serves as the comparison group. It is the same as the experimental group, except that the one variable that is being tested is removed. This group is what has always been done.
control group
What type of graph is best for showing percentages?
pie
This type of graph is best when displaying data that involves change over time
line
a possible explanation for what you observe (that you might assume is true)
inference
Qualitative observation uses your ___________ to describe the results of evidence gathered
senses
How many experimental/test groups should you have for a good reliable test?
several
Which variable typically goes on the X-Axis?
Independent
If a scientist conducts an experiment to test the theory that a vitamin could extend a person's life-expectancy, then the independent variable is the amount of vitamin that is given to the subjects within the experiment. This is controlled by the experimenting scientist. What are the dependent and independent variables?
independent variable: vitamin
dependent variable: life span
the steps scientists use to create explanations based on the evidence they gather
Scientific Method
An experiment in which only one variable is changed at a time. All other variables should be unchanged or "controlled", is called a _____________________ experiment
controlled
In order to have good reliable test results how many variables should you have?
1
Which variable typically goes on the Y-Axis?
Dependent
A scientist studies the impact of a drug on a certain disease. What is the independent and dependent variables?
independent variable: administration of the drug.
dependent variable: impact the drug has on the disease
evidence gathered through observations (especially during experiments)
data
the variable that is changed or tested by the experimenter
independent
The part of the experiment that stays the same in each test group
controls
This type of graph shows quantitative measurements when counting in groups and is good for comparison
bar
You are interested in finding out which color, type, and smell of flowers are preferred by butterflies for pollination. You randomly choose an area you know to be inhabited by butterflies and note all the species of flowers in that area. You want to measure pollination of flowers by butterflies. What are the independent and dependent variables?
independent variable:flower color, type, and smell
dependent variable:pollination by butterflies
A hypothesis should be written in the form of an ____________ _______________________ statement.
If_____ Then _________
The variable that changes as a result of the independent variable. What you observe, measure, and record during the experiment. The results that are observed
Dependent variable
The variable that would be the results of your testing
Dependent
You are testing how different amounts of fertilizers affect plant growth and you use 5 grams, 10, 20, 25, 30, and 35 grams of fertilizer. You notice that the more fertilizer used the average height of plants grows taller. If you chart the data gathered in this experiment what would be the independent variable?
amount of fertilizer in grams
Who will be nominated to the homecoming court?
Whoever gets the majority of the votes (that is usually the way it works)