GACE Science Practice Test Questions and Answers Already Passed

GACE Science Practice Test Questions and Answers Already Passed A researcher is studying the response of bacteria to a certain chemical. In 3 experiments, the bacteria swim towards the chemical, and in one experiment the bacteria swims away from it. What would be the most appropriate next step for the researcher. a. Report only the 1st 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 In a study investigating the cause of stomach ulcers, researchers observed that coffee drinkers had a higher incidence of stomach ulcers than those who didn't drink coffee. This is an example of: a. a controlled experiment b. a cause and effect relationship c. correlation between two variables d. systematic error in sampling C In terms of mass, which of the following represent the greatest amount of sucrose (Molar mass=342 grams)? a. 1 mole b. 100 grams c. 1L of a 0.1M solution c. 100mL of a 1M solution A 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 During a lesson, teachers should keep in mind that they need to demonstrate to their students how to a. understand, organize, and remember information b. organization, emphasize, and understand information c. emphasize, understand and remember information d. organize, understand, and remember information D 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 hat red blood cells be separated from the serum in whole blood. Which of the following laboratory techniques would