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The graph above is an example of a model called a a. physical model. b. conceptual model. c. mathematical model. d. climate model. A scientist can use the graph to a. make predictions about population growth. b. see the variables that affect population growth. c. test hypotheses about life span in the future. d.brainstorm solutions to overpopulation on Earth. According to the graph, what period of time shows the greatest increase in population growth? a. 1800–1900 c. 1950–2000 b. 1900–1950 d. 2000–2050 What do the data in this graph show? a. Unplowed soil has more earth worms than plowed soil. b. Plowed soil has more earthworms than unplowed soil. c. Plowing of the soil has no effect on the number of earth worms. d. The number of earth worms cannot be predicted. Where and when were most earthworms found? a. unplowed soil, spring 1995 b. unplowed soil, fall 1994 c. unplowed soil, fall 1995 d. plowed soil, spring 1994 What question did the scientists who collected this data want to answer? a. Are there more earthworms in the soil in the spring than in the fall? b. What is the effect of plowing soil on the number of earth worms? c. How is the size of the earthworms affected by the seasons? d.Does plowing the soil affect how fast earthworms grow? The best label for the x-axis (bottom axis would be): a. Type of soil c. Time of year b. Number of worms d. Season Which factor is a control variable in this experiment? a. Type of bee b. Flower color c. Group number d. Number of times a flower is visited 6. Which factor is most likely the independent variable in the experiment? a. Type of plant b. Type of bee c. Time of day d. Flower color Which of the following hypothesis could be tested by this experiment? a. If presented with different kinds of plants then honeybees prefer rose plants, because they smell better. b. If honey bees are presented with different colors of flowers then they will visit red flowers more, because the color is attractive. c. I predict honeybees will visit more flowers in the morning, because they are more active then. d. I predict honeybees will be more attracted to red flowers because that color is more attractive to them. Which of the following is the best reason why the Portland rose plant is included in all of the groups to be studied? a.This type of plant is a control variable, any type of plant could be used as long as they are all the same. b.The experiment will test whether bees prefer the Portland rose over other flowers. c. An experiment should always have more than one variable being tested. d. The Portland rose is a common plant, which, makes it easier to test. Give the measurement of the nail in cm. Give the measurement of the paper clip in cm Give the measurement of the paper clip in mm Give the measurement of the nail in mm. Give the measurement of the key in cm. Give the measurement of the key in mm. Give the measurement of the screw in cm. Give the measurement of the screw in mm. What is the volume of the rock? What is the triple beam balance measurement represented in the diagram above? 0 0 10 100 20 30 200 40 50 300 60 70 400 80 90 100 500 What is the triple beam balance measurement represented in the diagram above? 0 0 10 100 20 30 200 40 50 300 60 70 400 80 90 100 500 What is the triple beam balance measurement represented in the diagram above? 0 0 10 100 20 30 200 40 50 300 60 70 400 80 90 100 500 What is the triple beam balance measurement represented in the diagram above? 0 0 10 100 20 30 200 40 50 300 60 70 400 80 90 100 500 What is the triple beam balance measurement represented in the diagram above? 0 0 10 100 20 30 200 40 50 300 60 70 400 80 90 100 500 Which of the following is the independent variable in the experiment above? A) amount of chlorine used B) volume of water used C) length of time of the experiment D) temperature of the test tubes Which of the following is the dependent variable in the experiment above? A) amount of chlorine used B) volume of water used C) length of time of the experiment D) amount of algae in the test tube Which of the following is a control variable in the experiment above? A) amount of chlorine used B) volume of water used C) amount of algae in the test tube D) both a and b The picture shows the results of putting a drop of orange ink from a marking pen on a piece of filter paper and allowing the colors in the ink to separate. About how much farther on the filter paper has the yellow pigment moved than the red pigment? A) 3.5 cm B) 1.6 cm C) 1.9 cm D) 0.5 cm The above apparatus was set up as shown, and thermometer readings were recorded for 20 minutes. The results were then graphed. By how many degrees did the temperature of the hot water decrease in the 20 minutes that readings were taken? A) 20 degrees C C) 10 degrees C B) 14 degrees C D) 28 degrees C If solute is the solid substance being dissolved in the water, according to the graph which substance was the least soluble in water? A) Kl B) 1','1','1');" onmouseout="javascript:toggle_answer_button('answer1','1','0');">Ce2(S04)3 C) NaCl D) 3','3','1');" onmouseout="javascript:toggle_answer_button('answer3','3','0');">KClO3 The picture shows a test for non-slip surfaces to be used on a ramp. Which of these must be done to provide more meaningful results? Which car traveled the slowest? A) Car #1 B) Car #2 C) Car #3 D)Car #4 The data table below shows the masses and volumes of three objects (A, B, and C). The formula for calculating an object’s density is: Density = Mass . Volume Which statement about the densities of these three objects is correct? 1) B is more dense than A. 2) A is more dense than C. 3) B and C have equal densities. 4) A and C have equal densities. Which statement is best supported by the data in the table? A) Venus takes less time to orbit the Sun than Mercury does. B) Mars takes less time to orbit the Sun than Earth does. C) Mars takes more time to orbit the Sun than Earth does. D) Venus takes more time to orbit the Sun than Mars does. The data table below shows the average distance of four planets from the Sun and the approximate time it takes those planets to orbit the Sun. The diagram below shows the Moon revolving around Earth as viewed from space. What makes it possible to see the Moon from Earth? A) The surface of the Moon emits its own light, which can be seen from Earth. B) The Moon absorbs light during the day and emits the light at night. C) Light emitted by Earth illuminates the Moon’s surface, making it visible. D) Light emitted by the Sun is reflected to Earth by the Moon’s surface. Predict how many centimeters the spring will stretch if a total mass of 700 grams were attached. What mass would be needed to stretch the spring to a length of 60 cm? During this experiment different rubber bands were stretched to see how far they would stretch. What would be an appropriate label for the columns? A. The person stretching the rubber bands B. Type of rubber band C. size of rubber band (cm) D. distance rubber band stretched (cm) In this data table what elements of a good data table are missing? A. Column label/s for the independent variable/s B. Labels for the amount of mass used to stretch rubberbands C. Nothing is missing D. Column label/s for the dependent variable/s Two students were hanging 100g masses off of 2 rubber bands to see how far they would stretch. A more appropriate title for this data table would be... A. Stretch Data B. Stretch of 2 Different Rubber Bands C. Data Table D. Size of 2 Different Rubber Bands This is an example of a... A. Data Table B. Procedure C. Graph D. Analysis This is an example of a... A. Graph B. Data Table C. Analysis D. 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