Scientific Method
In which step of the scientific method do we explain why we reject or accept our hypothesis? _____________________________
Conclusion
Is the statement an observation, inference or prediction:
My friend's backpack is super full on Monday morning. They must have been studying this weekend.
Inference
Data that describes an observation using words and the five senses is called ___________________________ data.
Qualitative
Name two things that every graph must have:
Title
Axis labels
Scale
Why do we do experiments?
We do experiments to test hypotheses.
We test hypotheses to answer scientific questions.
Scientists gain knowledge about the world using the __________________________ __________________________________.
Scientific method
Turn the question into a hypothesis:
What happens when I plant a quarter in the ground?
If I plant a quarter in the ground, then a money tree will grow.
What is the name for a variable that must remain the same across trials in an experiment? __________________________________________
Control variable
1)Draw and label an X and Y axis:
2) Which variable should be graphed on the X axis?
1) y |_ x
2) The independent variable
Design an experiment
Experiment has IV, DV, CVs
In which step of the scientific method do we test our hypothesis?
Experiment
Inference
Data that describes an observation using numbers and their units is called ________________________ data.
Quantitative
Data showing change over time or the relationship between two things is often graphed on a _________________________________.
line graph
Define frequency
Frequency is how often a data point occurs
What does it mean to accept or reject a hypothesis?
Accept: our prediction was correct
reject: our prediction was not correct
Rewrite as a good scientific question:
What is the best color?
1) What is the favorite color of some group
2) What is the most common color in some place
When designing an experiment, the ____________________________________________ is what is being measured by the scientist. This is the data collected during the experiment.
Dependent variable
Data comparing two or more groups is often graphed as a _______________________.
Bar graph
What is Ms. Landa's favorite color?
Purple
After asking a scientific question and doing research to find the answer, scientists write a ____________________________________, where they predict the outcome of an experiment that is designed to answer the question.
Hypothesis
Rewrite the prediction as a hypothesis:
The team is going to win the relay because they wore their lucky shoelaces.
If the team wears their lucky shoelaces, then they will win
Ms. Weiler wants to test the hypothesis: If Leo turns colors based on the food he eats, then he will turn red when he is fed tomatoes and green when he is fed cucumbers. What is the independent variable in Ms. Weiler’s experiment?
The food Leo eats
Ms. Luna took a survey of the color of students' hats at BASIS Mars. Her data includes: grade students are in, color of hat, number of students wearing that color hat.
What type of graph would best show Ms. Luna's data?
Bar graph
miligram
gram
kilogram