Which points did you include in your response? Check all that apply.
Which points did you include in your response? Check all that apply.
Why are experimental investigations the best type of scientific investigation to demonstrate cause-and-effect relationships?
Experimental investigations are the best type of scientific investigation to demonstrate causeandeffect relationships because they allow the investigator to actively manipulate variables and control conditions. The independent variable can be isolated and manipulated, producing a change (or no change) in the dependent variable. This change can be measured to gather evidence to support or refute the causeandeffect relationship. Experimental investigations also use a control group (a group that does not receive the factor being tested) for comparison.
Which points did you include in your response? Check all that apply.
Huan wants to enter the science fair at his school. He has a list of ideas for his project. Which questions could be answered through scientific investigation? Check all that apply.Does pressure have an effect on the volume of a gas?Which physicist was the smartest?Is the information on the periodic table difficult to understand?Which brand of soap is the best for cleaning grease off dishes?Which laboratory experiment is the most fun to perform?
asking a questionperforming an investigation✔ collecting dataproviding explanationscommunicating results
asking a question✔ performing an investigationcollecting dataproviding explanationscommunicating results
asking a questionperforming an investigationcollecting dataproviding explanations✔ communicating results
✔ asking a questionperforming an investigationcollecting dataproviding explanationscommunicating results
asking a questionperforming an investigationcollecting data✔ providing explanationscommunicating results
In a laboratory, Nakisha mixes a sodium hydroxide solution with an indicator called phenolphthalein. When combined, they create a pink solution. Nakisha wonders if mixing other solutions with phenolphthalein will also create this pink color. How could Nakisha use the scientific inquiry process to determine whether mixing other solutions with phenolphthalein will also create a pink color? Check all that apply.by making qualitative observations about the sodium hydroxide and phenolphthalein in solutionby asking a classmate if sodium hydroxide turns pink when mixed with other solutionsby comparing the given solution to other familiar solutions containing phenolphthaleinby designing an experiment to test phenolphthalein with other solutionsby repeating the experiment at different temperatures
descriptivecomparative✔ experimental
descriptive✔ comparativeexperimental
✔ independent variabledependent variablecontrol group
independent variable✔ dependent variablecontrol group
Why aren't descriptive investigations repeatable?
Descriptive investigations are not repeatable because they are based only on observations made at a single point in time. The results may vary at a different time. In addition, descriptive investigations do not contain variables that may indicate causeandeffect relationships.
Name one benefit and one limitation of comparative investigations.
Comparative investigations provide large amounts of information and use a wide range of variables. However, they may reveal relationships that do not always indicate cause and effect.
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