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A teacher writes the following note on a student's experimental design: You did not identify and control variables. Why is it important to identify and control variables?
because a scientist must know which variable causes change
How much weight a new bridge can support...
Repeat the experiment to check for errors.
It helps scientists compare their results to a standard.
testing the hypothesis
identifying and controlling variables
A dog can jump higher than a cat.
False
A scientific method is a way to investigate a scientific problem. Although the order of steps may vary, the tasks performed during each step often stays the same. During which step of the scientific method would a scientist collect data?
because a scientist must know which variable causes change
How much weight a new bridge can support...
Repeat the experiment to check for errors.
It helps scientists compare their results to a standard.
testing the hypothesis
identifying and controlling variables
A dog can jump higher than a cat.
False
Scientists include controls in their experiments. Why is a control important?
because a scientist must know which variable causes change
How much weight a new bridge can support...
Repeat the experiment to check for errors.
It helps scientists compare their results to a standard.
testing the hypothesis
identifying and controlling variables
A dog can jump higher than a cat.
False
Which of the following is always an important part of an experiment?
because a scientist must know which variable causes change
How much weight a new bridge can support...
Repeat the experiment to check for errors.
It helps scientists compare their results to a standard.
testing the hypothesis
identifying and controlling variables
A dog can jump higher than a cat.
False
A hypothesis must be testable. Which one is testable?
because a scientist must know which variable causes change
How much weight a new bridge can support...
Repeat the experiment to check for errors.
It helps scientists compare their results to a standard.
testing the hypothesis
identifying and controlling variables
A dog can jump higher than a cat.
False
Angie conducts an experiment. Her results do not support her hypothesis. What should she do?
because a scientist must know which variable causes change
How much weight a new bridge can support...
Repeat the experiment to check for errors.
It helps scientists compare their results to a standard.
testing the hypothesis
identifying and controlling variables
A dog can jump higher than a cat.
False
Models allow scientists to test things that might be too expensive or difficult to test using the real item. Which of the following would be an investigation that uses a model?
because a scientist must know which variable causes change
How much weight a new bridge can support...
Repeat the experiment to check for errors.
It helps scientists compare their results to a standard.
testing the hypothesis
identifying and controlling variables
A dog can jump higher than a cat.
False
An investigation and experiment are exactly the same thing. True or false?
because a scientist must know which variable causes change
How much weight a new bridge can support...
Repeat the experiment to check for errors.
It helps scientists compare their results to a standard.
testing the hypothesis
identifying and controlling variables
A dog can jump higher than a cat.
False
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