BELLWORK th 6 grade BELLWORK 1 Use the

BELLWORK th 6 grade

BELLWORK 1 • Use the following data table to answer questions 1 through 4. • How does the type of light affect plant growth? • SC. 6. N. 1. 1 • 1. The chart above shows the results of an experiment to test the effects of different artificial lights on bean plant seedling growth. Which group of plants showed the greatest gain in height? • A. Group 1 • B. Group 2 • C. Group 3 • D. Group

BELLWORK 2 • 2. In the experiment above, what is the independent variable? A. The type of artificial light. B. The average height after two weeks. C. The type of plant used. D. The number of plants tested in each group. • SC. 6. N. 1. 1 • 3. In the experiment above, what is the dependent variable? A. The brand of artificial light. B. The average height after two weeks. C. The type of plant used. D. The number of plants tested in each group. • SC. 6. N. 1. 1 • 4. Which group is the control? A. Group 1 B. Group 2 C. Group 3 D. Group 4

BELLWORK 3 • 5. What might explain the fact that the plants grown in sunlight did not show the greatest growth in height? • A. Plants don’t grow well in sunlight. • B. Photosynthesis will only take place without sunlight. • C. During this two-week there was not enough sunlight for proper growth. • D. A different plant should have been used in this experiment.

BELLWORK 4 • • • SC. 6. N. 1. 5 6. What might explain the results obtained from Groups 2, 3, and 4? A. Incandescent light is the most like sunlight. B. Plants do not grow well in artificial light. C. Fluorescent light is most like sunlight. D. Plant growth is not a valid way to test artificial light. SC. 6. N. 3. 1 7. Based on scientific theory, the students expected the plants grown in sunlight to show the greatest increase in average height. Which best describes how their results will affect their hypothesis? A. Their results support theory. B. Their results are different than expected, but still support theory. C. Their results support their hypothesis but theory must be modified. D. Their results do not support their hypothesis so their hypothesis must be changed.

BELLWORK 5 • 8. At one time scientists believed that the atom was the smallest known particle. • Today we now know that smaller particles exist within the atom. Knowing this information it may be said that • A. New information never changes old theories. • B. Old theories may be challenged but never changed. • C. Old theories can be changed as new information is found. • D. Old theories can be changed as old information is found.

BELLWORK 6 • 9. Daniel is working on a lab in his chemistry class, and Isabella is working on a lab in her biology class. The subjects both students are learning are very different. How does Daniel's chemistry lab and Isabella's biology lab compare? • A. Both labs use the same tools. • B. Both labs use the same materials. • C. Both labs need to reach the same conclusions. • D. Both labs use a scientific method to answer questions. • SC. 6. N. 1. 3 • 10. A common goal for all scientists is to • A. build spacecrafts. • B. create cures for cancer. • C. publish science books. • D. answer questions about the natural world.

BELLWORK 7 • SC. 6. N. 1. 3 • 11. A good way for a scientist to investigate the answers to a scientific problem is to • A. only do research and conduct experiments. • B. only make observations and conduct experiments. • C. conduct experiments only. • D. do research, make observations, and conduct experiments. • SC. 6. N. 1. 2 • 12. A student conducted an original, well-designed experiment, carefully following the scientific method. In order for the conclusions to be believable, the experiment must: • A. Contain several experimental variables. • B. Be repeated to verify the reliability of the data. • C. Support the original hypothesis. • D. Be conducted by a scientist.

BELLWORK 8 • 13. Two students conducted similar investigations for their science fair project. • Although their experiments were the same their data was different. How would you determine which student’s data is most reliable? • A. It is impossible to determine which investigation is reliable. • B. Choose the set of data you think is most reliable. • C. Repeat the experiment exactly and compare the new data. • D. Both sets of data are not reliable.

BELLWORK 9 • 14. A farmer hypothesizes that tomatoes grow larger when they receive rainwater instead of well water. He shows you some tomatoes that were grown in a greenhouse with well water, and some larger tomatoes that were grown outside • with spring water. What reason would you give the farmer to explain why his hypothesis is incorrect? • A. He used two different types of water. • B. His hypothesis is not logical. • C. More than one variable was changed in his study. • D. Tomatoes should not be used in experiments.

BELLWORK 10 Turn in gizmo! • SC. 6. N. 1. 4 • 15. Two scientists, each working for a different company, identified and isolated a virus that causes a type of flu. However, each scientist identified a different • virus. What is the best method to verify their results? • A. People with the flu should evaluate the results. • B. Neither scientist should review the other scientist’s work. • C. Further study is needed by more scientists. • D. Both scientists should throw out their work and start over. • Turn in gizmo!

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