Unit Test — Unit test Answers

Regina conducted an investigation to determine whether earthworms add nutrients to soil. She used two pots of soil. She added three earthworms to the first pot. She did not add any earthworms to the second pot, which was the control. Regina tested the nutrient levels of the soil in both pots after two weeks.What type of investigation is Regina conducting?

Based on calculations, students should have 10.4 grams of powder after conducting an experiment. The students get these results: 10.2 grams, 10.4 grams, 10.3 grams, 10.4 grams, and 10.5 grams.Which words best describe this data?

Charles is conducting an experiment to test the hypothesis that identical twins throughout the world have different fingerprints.How can Charles best conduct this experiment to avoid limitations?

The scatterplot shows how much ice cream people consume in relation to outside temperature.

The graph shows the average monthly rainfall for a forested area.

How could a scientist demonstrate ethical behavior?

Which is one of the contributions that supported the development of the Clean Water Act?

The images show how telescope technology has advanced over time.Which telescope was first used to observe the skies?

Kelly wants to know how a cactus adapts to the hot, dry conditions of the desert. She reads several previously conducted studies about cactus plants.Which part of the scientific process did she complete?

Which action describes the first step in both scientific investigation and technological design?

Jorge has to refinish a dining room table and has only 3 days to complete the job. His sander is not working, and he needs to replace it with a new one. Jorge wants to go with the most cost-effective and time-effective option when deciding where to purchase the sander, but tradeoffs may be necessary.

Mark observes that when his father throws a basketball, it bounces higher than when Mark throws the same ball. He wonders, "Is this because my dad is much taller than me?"What can Mark do to best answer his question?

Maria is comparing data from an investigation about the melting point of ice. Based on her research, she knows ice melts at 32°F or 0°C.Which data set is accurate?

Scientists are studying cell-to-cell communication in a human spleen.How would scientists most likely use technology during this study?

Which phrase best describes the role of science in forming the Clean Water Act?

For which question could a scientist develop a testable hypothesis?

Which phrase best defines a prototype?

Which is a factual statement that cannot be changed or replaced?

A group of students conducts an experiment to test the amount of sugar that can be dissolved in water at 50°F, 100°F, and 200°F.Which suggestion will help increase confidence in the results?

Mary is conducting an experiment on how pollution affects plant growth. How can she ensure that her data are reliable?