Scientific Method
Scientific Investigations
Application
Big Mistakes
Vocabualry
100
The question must be __________________. I cannot involve opinions, emotions, or values.
What is scientific?
100
A controlled experiment should have _______ variable(s)
What is one?
100
When testing the question " What is the effect of temperature on the surface tension of water," what is the manipulated variable?
What is temperature.
100
Joe is testing the effect of salt water on bean plants. He plants two plants, waters one with tap water and one with salt water. He controls all of the other variables. What is his big mistake?
His sample size is too small. His conclusion will be invalid.
100
What is using your senses to gather information about the world?
What is observation
200
This is the possible answer to a scientific question.
What is hypothesis?
200
This is the one variable that is changed to test a hypothesis.
What is the manipulated or independent variable
200
When testing to answer the question... Does adding sugar to water prolong the life of cut flowers? what is the responding/dependent variable?
What is how long the cut flowers last?
200
Mary is testing the effect of red light on plant growth. She plants 100 plants (50 in potting soil and 50 in soil from her yard) She places one group under red light and one group in sunlight. What is her big mistake?
Mary has two variables. It is not a controlled experiment. It is biased. Her conclusion will not be valid.
200
These are observations that are involve numbers or amounts. Give 2 examples.
What is quantitative = The elephant weighed one ton. The tree was 70 feet tall.
300
This is the summary of the results of the experiment. The hypothesis is determined to be valid or invalid.
What is conclusion.
300
This is the variable that responds to the change in the manipulated variable. It is the factor that is measured, counted,...
What is the responding/dependent variable?
300
When testing the effect of fertilizer on the growth of beans, how many beans would you plant? Why?
What is at least 100 because a large sample size is required.
300
Antonio is conducting an experiment to find out if dogs like chicken flavor or beef flavor. He sets up a perfectly controlled experiment, so what's the big mistake?
Antonio's question is not scientific. He cannot measure the "likes" of dogs.
300
These are rules that state what will happen under certain circumstances.
Scientific Laws
400
This is how scientists test their hypothesis and find an answer to their question.
What is investigation/experiment?
400
These are factors that can change in an experiment.
What is variables?
400
When setting up a controlled experiment, how many groups are require and what are they.
What is two - a control and test/experimental group?
400
Beth is setting up an experiment to determine if children score higher on tests if they listen to music while studying. She conducts a controlled experiment in which 100 of her 7th grade classmates take tests after studying with and without music. What is the big problem?
Beth's sample of !00 7th grade students does not represent the group she identified in her question. The sample must be representative of the population. She needs to change her question to 7th grade students or she needs to test children of all ages.
400
These are explanations of observations or events based on knowledge gained from many observations and investigations.
What is scientific theory/
500
This is sharing the results of the investigation by speaking or writing.
What is communicating?
500
These are the variables that the scientist must keep the same in an experiment.
What are constants or controlled variables?
500
How is the control group different from the test group and what is its purpose?
The control group is the standard of comparison in a controlled experiment. It is different because it does not have the manipulated variable.
500
Kamir is testing the hypothesis, "If honesty is important to 2nd graders, then they will not steal money that is left on the table." He sets up a controlled experiment. What's the problem?
The hypothesis is not testable. It involves the value of honest.
500
The practical use of scientific knowledge, especially for commercial or industrial use... the use of science to improve life or solve problems.
What is technology
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