a.height of the cotton plants in both fields b.diameter of the cotton bolls in both fields c.length of the growing seaso

1. A student formulated a hypothesis that cotton will grow larger bolls (pods) if magnesium is added to the soil. The student has two experimental fields of cotton, one with magnesium and one without. Which data should be collected to support this hypothesis? a.height of the cotton plants in both fields b.diameter of the cotton bolls in both fields c.length of the growing season in both fields d.color of the cotton bolls in both fields

2. Tomato plants in a garden are not growing well. The gardener hypothesizes that the soil is too acidic. To test this hypothesis accurately, the gardener could a.plant seeds of a different kind of plant b.change the acidity of the soil c.move the tomato plants to an area with less sunlight d.reduce the amount of water available to the plant

3. A student hypothesized that lettuce seeds would not germinate (begin to grow) unless they were covered with soil. The student planted 10 lettuce seeds under a layer of soil and scattered 10 lettuce seeds on top of the soil.To improve the reliability of these results, the student should a.conclude that darkness is necessary for lettuce seed germination b.conclude that light is necessary for lettuce seed germination c.revise the hypothesis d.repeat the experiment using a larger sample size

4. Diagrams, tables, and graphs are used by scientists mainly to a.design a research plan for an experiment b.predict the independent variable c.test a hypothesis d.organize data

5. What tool could best be used in order to accurately measure the volume of a liquid? a.beaker b.meter stick c.electronic balance d.graduated cylinder

6. A student noted that 22 chairs in the classroom were red.  This is an example of a(n) a.hypothesis. b.observation. c.theory. d.experiment. 

7.  A measurement of 38.4 mL is the same as a.3.84 L b.384 L c.38,400 L d.0.0384 L

8. A biologist in a laboratory reports a new discovery based on experimental results. If the experimental results are valid, biologists in other laboratories should be able to a.repeat the same experiment with a different variable and obtain the same results b.repeat the same experiment and obtain the same results c.perform the same experiment and obtain different results d.perform the same experiment under different experimental conditions and obtain the same results

9. A student conducted an original, well designed experiment, carefully following        proper scientific procedure.   In order for the conclusions to become generally        supported, the experiment must • contain several experimental variables • be repeated to verify the reliability of the data  • support the original hypothesis • be conducted by a scientist

10. How long is the piece of metal?

11. How long is the tip of the leaf?

12. What is the volume of the water?

13. How much water would have to be added to reach a total volume of 25 ml?

14. What is the length of the leaf?

15. How much water should be removed from thegraduated cylinder shown below to leave 5 millilitersof water in the cylinder? • (1) 6 mL (3) 11 mL(2) 7 mL (4) 12 mL