EOC Questions - DO NOT WRITE ON THIS!!!
1. A scientist found that the results of an experiment did not support her hypothesis. If she is following proper scientific procedure, what should she do next?
a. Discard those results and repeat the experiment.
b. Accept the hypothesis and exclude data that does not fit.
c. Reject the hypothesis and assume it is incorrect.
d. Create a new hypothesis and a new experiment to test it.
2. Which technique is NOT a proper procedure for a classroom lab activity?
a. Using a compound microscope, first focusing on the specimen using a lower power, then switching to a higher power.
b. Turning on the gas of a Bunsen burner to adjust the gas flow, then striking a match to test it.
c. Determining the odor of a burning substance by fanning, with your hand, the scent from a test tube towards your nose.
d. Cleaning up liquid that spilled onto the floor immediately
3. Which experimental design would provide scientists with the best data for investigating which type of feed yields the greatest gain in lean muscle mass in cattle?
a. Test 5 different types of cows with the same feed mixture and measure their weight gain at the end of a 6-week trial.
b. Test 5 similar types of cows with the 5 different feed mixtures and measure their weight gain at the end of a 6-week trial.
c. Test 5 similar types of cows with the same feed mixture, give each group varying amounts of feed, and measure their weight gain at the end of a 6-week trial.
d. Test 5 different types of cows with the five different feed mixtures, give each group varying amounts of feed, and measure their weight gain at the end of a 6-week trial.
4. Chan wants to determine the change in length for fungus growing on a nutrient agar plate over an 8 hr. period. What is the most appropriate unit of measure for him to use?
a. kilogramc. milligram
b. kilometerd. millimeter
5. After questions were raised about his research, Dr. H., a university scientist, admitted he fabricated much of the data in a paper. Which procedure was probably LEAST effective in discovering and documenting this case of scientific dishonesty?
a. Peer review of Dr. H.’s paper before its publication
b. Comparison of Dr. H.’s research results with related research results of other scientists
c. Inability of other scientists to replicate Dr. H.’s results
d. Complaints of Dr. H.’s secrecy regarding his research techniques
6. Ella told her sister the sun would set at 6:30 p.m. and there would be a full moon on Thursday night.
Under which basic assumption of science is she operating?
a. Nature is orderly
b. Knowledge is superior to ignorance.
c. Nothing is self-evident.
d. All phenomena have natural causes.
7. A scientist burned 100 g of rice until only 15 g of inorganic material remained. Approximate the percentage of organic material in the original 100 g rice saple.
a. 0.15%b. 15%c. .85%d. 85%
8. A microbiologist has a bacterial culture with 100,000 cells per mL of nutrient broth, but needs to dilute the culture with sterile nutrient broth to 1000 cells/mL. To accomplish this, the microbiologist should dilute 1 mL of the culture to what total volume, in mL?
a. 10b. 90c. 100d. 1,000