MS. CRESPO - Home



Name: __________________________________________ Date:____________ P.________Week 1 FCAT REVIEW PACKET WEEK Nature of Science SC.N.8.1.1Read each question carefully. Use your science book, Powerpoints on or your class notebook to help you answer each one. Highlight correct answer. Write below why this is the correct answer instead of the other 3 choices.Multiple Choice1.During the nineteenth century, biologists knew that South America and Africa contained similar fossils. These fossils led them to believe that a temporary land bridge between South America and Africa allowed ancient species to move between both continents. In the twentieth century, evidence showed that South America and Africa were once part of the same larger continent and that there were no land bridges between them. How should biologists respond to the new geological finding?F. Biologists should reject the geological finding, because it is new.G. Biologists should ask physicists what to do, because physics is a more exact science.H. Biologists should reject the belief in ancient species, because there were no land bridges.I. Biologists should update the history of life, because it should include the new geological finding.Explain why is that the correct answer:________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________2.Astronomers send probes to other planets to take pictures of their surfaces. An astronomer thinks that briny water flows on Mars because he noticed certain features in one picture of Mars. Which method did the astronomer use to form this hypothesis?A. reading scientific literatureB. making careful observationsC. analyzing a natural experimentD. conducting a controlled experimentExplain why is that the correct answer:___________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________3. Chemists once believed that an atom was made of negative electrons dispersed inside a positive mass like raisins in pudding. An experiment with radiation and gold foil demonstrated that most of an atom was made of empty space. After this experiment, they adopted a new model of the atom that showed the electrons orbiting the nucleus of the atom from a distance. Which of the following statements about the new model is true?A. The new model is perfect and will not change.B. The new model is a wrong model and will not last.C. The new model fits the data worse than the old model.D. The new model fits the data better than the old model.Explain why is that the correct answer:________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________4.A scientist testing the effects of a new medicine that will treat anemia, a blood disorder, uses a sample size of 15 patients for a study. All of the patients are from the same large city, are of varying ages, and are male. Which of the following is an accurate statement regarding this investigation? A. Using a sample size of 15 people is too small. The investigation will not be a reliable and valid test of the medicine. B. Using a sample of people of the same gender always allows the scientist to obtain the most accurate data for the study. C. Using varying ages of people will add necessary data to this study, causing the investigation’s results to be informative and useful. D. Using a sample from the same city is necessary to allow the scientist to control for all other factors that may have an effect on the medicine’s effectiveness.Explain why is that the correct answer: _______________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________3067050589915005. Andy wants to know if heavier carts roll down a ramp faster than lighter carts. He has some carts with big wheels, others with small wheels, and wooden blocks to vary the carts' weight. Each block weighs the same, and he'll use the same ramp for each trial. Which three carts would be best for Andy's experiment? A. A, B, and D B. A, C, and E C. C, E, and F D. B, C, and DExplain why is that the correct answer: ________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________6. A student conducts an experiment in which she drops objects, each with a different mass, all from the same height. She uses a stopwatch and records the time it takes for each object to hit the ground. Which of the following is the independent variable in her experiment? A. Time the object travels B. Height at which object is dropped C. Mass of the object D. Stopwatch used Explain why is that the correct answer:______________________________________________________________________________________________________________________________________________________________________________________________________________________________7. When conducting an experiment, which of the following is most important in getting valid results? A. Technology needs to be used to determine the results. B. An unbiased observer must witness the experiment. C. The outcome needs to be controlled. D. Only one variable must be changed during the experiment. Explain why is that the correct answer:________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________8. Mrs. Aldaco added a room-temperature copper (Cu) cube and an aluminum (Al) cube that she just removed from the freezer to a beaker of boiling water.29146501714500She left the cubes in the water for three hours. Which of the following describes a heat flow that took place during those three hours? A. from the aluminum cube to the beaker B. from the copper cube to the boiling water C. from the aluminum cube to the copper cube D. from the boiling water to the aluminum cube Explain why is that the correct answer: ___________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________30194257524759.Frank is comparing the quality of popcorn kept in the freezer to popcorn kept in a cabinet. He put one jar of popcorn in the freezer and another in a cabinet. After a month, he put 100 kernels from each jar in separate paper bags. He popped both separately in the microwave on high for 2 minutes. After counting the un-popped kernels in each bag, he repeated his experiment three times. From his results below, Frank can conclude that A. Freezer popcorn should be cooked longer. B. Room temperature popcorn has more popped kernels. C. Freezer popcorn gets too dried out to pop well. D. The humidity is higher at room temperature than in the freezerExplain why is that the correct answer:_________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________10. Fresh milk has several parts that a farmer can separate and sell. A farmer removes the top layer of fat from fresh milk.What property does the farmer use to separate the fat from the rest of the milk?A. densityB. magnetismC. boiling pointD. electrical conductivityExplain why is that the correct answer: ________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________ ................
................

In order to avoid copyright disputes, this page is only a partial summary.

Google Online Preview   Download