OAE Middle Grades Science (029) | 80 Questions | 100% Correct Answers

Which of the following compounds is not allowed in a school laboratory because it is a potential carcinogen? A: lead B: benzene C: aspartame D: methanol - B A laboratory experiment requires that red blood cells be separated from the serum in whole blood. Which of the following laboratory techniques would be most appropriate for this task? A: spectroscopy B: sublimation C: microscopy D: centrifugation - D Which of the following quantities is the largest in the metric system of measurement? A: 10 decimeters B: 100 milligrams C: 100 grams D: 1 decagram - C In an experiment on respiration, carbon dioxide production is measured over time. Placing the data in a chart is A: a visual representation of the data B: a conclusion based on the data C: the raw data D: a comparative analysis of the data - A In order to be included in the formation of a scientific conclusion, evidence must be A: Quantitative B: Reproducible C: Obvious D: All of the above - B A researcher is studying the response of bacteria to a certain chemical. In three experiments , the bacteria swim towards the chemical, and in one experiment the bacteria swim away from it. What would be the most appropriate next step for researchers? A: report only the first three experiments B: report all the experiments, but refrain from making any conclusions C: Repeat the experiment several more times and apply a statistical analysis to the data D: repeat the experiment , adding a new chemical to determine its effect on the bacteria - C