Earth Science Benchmark review

Pam performs an experiment in which she measures the height of three male and four female students in her class to determine how height changes based on gender. What is wrong with her experiment that makes it not valid?

• She does not have an independent variable

• She does not have a dependent variable

• She has too small of a sample size in her experiment

• She didn't record measurements using the proper SI units

Jim believes that since he lives in the Coastal Plains region of Virginia that his backyard would have more sedimentary rocks. He tests his hypothesis by going outside and collecting and identifying multiple rock samples. Which statement about his hypothesis is correct?

• The hypothesis should be accepted because there were more sedimentary rocks in the back yard

• The hypothesis should be rejected because there were more igneous rocks in the back yard

• The hypothesis should be accepted because there was an even amount of metamorphic rocks in the back yard

• The hypothesis should be rejected because there were more sedimentary rocks in the front yard

For the hypothesis "If students play Quizizz, then their grades on the test will improve", what is the dependent variable?

• How many times the students play Quizizz

• The student grades on the test

• The classroom that the students play Quizzizz in

• The time of day that students play Quizzizz

For the hypothesis "If students play Quizizz, then their grades on the test will improve", what is the independent variable?

• Students preparing for the test by playing Quizizz

• The student grades on the test

• The classroom that the students play Quizzizz in

• The time of day that students play Quizzizz

For the hypothesis "If students play Quizizz, then their grades on the test will improve", what is a constant?

• How many times the students play Quizizz

• The student grades on the test

• The classroom that the students play Quizzizz in

• The student final grade in the course

Mr. Overstreet wants to conduct an experiment at SHS to find out if boys are taller than girls. To conduct his experiment, he randomly measures 2 boys and 2 girls from one of his classes. All of the students are from the same class and are measured with the same ruler. What makes his results invalid?

• Mr. Overstreet did not have a dependent variable

• Mr. Overstreet had more than one independent variable

• Mr. Overstreet had too small of a sample size to make a valid conclusion

• Mr. Overstreet did not use the proper technique to take measurements

Students plan to use several rain gauges to compare average monthly rainfall on Virginia's Coastal Plain and Piedmont regions. Which of these variables should be manipulated?

• Height of the gauge

• Brand of the gauge

• Size of the gauge

• Location of the gauge

What is the best description of the four primary spheres of Earth that we discussed in class?

• The spheres are simple procsesses

• The spheres are all completely separate systems

• The spheres are completely unrelated to one another

• The spheres are interrelated and influence one another

Looking at the table shown in the diagram, what would be the dependent variable for this experiment?

• Amount of Water (mL)

• Temperature of Sugar (C)

• Temperature of Water (C)

• Amount of Sugar Dissolved (g)

Looking at the table shown in the diagram, what would be the independent variable for this experiment?

• Amount of Water (mL)

• Temperature of Sugar (C)

• Temperature of Water (C)

• Amount of Sugar Dissolved (g)