Unit 1 Target 7-scientific Method Quiz

1. Which part of the scientific method involves testing a hypothesis?

2. During an experiment, this should be done so that there is evidence to support or reject the hypothesis.

3. This is necessary so that other scientists can confirm the validity of the results of an experiment.

4. A hypothesis is

5. A scientist noticed that in acidic pond water some salamanders developed with curved spines. This was a(n)

6. A student doing research on pill bugs hypothesized that pill bugs would be found in moist habitats, but not in dry habitats. The student found 2 pill bugs at 1 site: 1 under a log in moist conditions and another underneath some dry leaves. This finding did not support the student's original hypothesis. What should the student do next to determine if the original hypothesis is valid?

7. Bryce is planning to plant tomatoes in his garden. He wants to determine if tomato seeds will germinate (sprout) faster in soil with sugar added than in soil with no sugar added. He plants one seed in 100 grams of soil in each of 20 pots. Which experiment will give him the most useful results?

8. Typically, the order in which the steps of the scientific method are applied is

9. Two students conducted studies to determine the amount of bacteria in hamburgers cooked to different internal temperatures. The students cooked 3 hamburgers: 1 rare, 1 medium, and 1 well-done. The students then took a core from the center of each hamburger and placed each core in a separate petri dish with nutrient agar. Each dish was incubated until colonies formed. The students hypothesized that the rare hamburger core would generate the most bacteria colonies.Eight hundred colonies grew in the dish containing the rare hamburger core, 400 colonies grew in the dish containing the medium hamburger core, and 0 colonies grew in the dish containing the well-done hamburger core. What is the most appropriate next step for the students to take in this study?

10. Dr. Graham has written a paper on the internal temperature of nests of alligator eggs. His data shows that temperature determines the sex of the hatchlings. What is the best method of validating the reliability of Dr. Graham's experiment?

11. Which example of scientific methodology is incorrect?

12. A hypothesis that does not explain an observation

13. 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?