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Name: _____________________________________Date:________Lab: Data Analysis Unit question: Why do humans create models?Content question: Is a picture really worth a thousand words?Introduction: Data collection is a part of all science experiments. It’s important to have a place to organize and display data, so that as the experiment proceeds, and after its complete, the data can be easily studied and analyzed. In addition, graphs are often constructed from data, so having it organized makes constructing a graph much easier. Graphs are visual representations of data and they make the analysis of the data more efficient. Finally, conclusions made at the end of an experiment must be based on data, so having the data organized helps a scientist make more accurate conclusions.329565019367500Objectives: When you have completed this lab, you should be able to:Organize data into a tableAnalyze data to make accurate conclusionsProblem:How is data that is collected in an experiment organized?Materials: data tables Procedure:Follow the directions given for each set of data. Answer all questions that follow.Observations: 8 sets of dataGrade: _______Data Analysis #1 (15 points)Read the passage and analyze the data. Use the reading passage, the data shown and your knowledge of the living environment to answer the questions that follow.Bald Eagle Facts? Bald eagles eat primarily fish, carrion (dead animals), smaller birds, and rodents. Their most important non-carrion food is fish, which they catch by swooping down and grabbing fish that are near the surface of the water.? The number of nesting pairs in the lower 48 United States increased from fewer than 450 in the early 1960s to more than 4,500 adult bald eagle nesting pairs in the 1990s. Today, there are an estimated 9,789 nesting pairs of bald eagles.? Bald eagles are found in large numbers in certain areas during the winter (known as roosts). These winter roosts are located in areas where prey are plentiful. Winter roosts are protected under federal law, and managed with a buffer zone to reduce human disturbance. As winter ends, the eagles return to their summer nesting/hunting areas.Bald Eagle ResearchIn the winter of 2009, volunteers from an Audubon group conducted a survey of roosting bald eagles at four locations in an area in the lower Hudson River Valley. The data below show the average number of eagles sighted and the number of visits made by the volunteers each month. Among the other data collected were percent ice cover and percent cloud cover on the surface of the water. The eagles fly freely between these four sites, dependingon a variety of conditions.-13335025082500Some of the data are shown in the table below.1.State one reason why the percent ice cover is important to the ability of eagles to obtain food. __________________________________________________________________________________________________________________________________________________________________________________________2. What inference can be made about the percent ice cover at Croton Reservoir between January and February 2009? Circle one: The percent of ice Increased or DecreasedSupport your answer using the data. __________________________________________________________________________________________________________________________________________________________________________________________Data Analysis #2 (15 points)Read the information below and then organize and analyze the data. Use the information from the reading, the data shown and your knowledge of the living environment to answer the questions that follow.Different plant species require different amounts of direct sunlight in order to flower. A student designed an experiment to determine the length of exposure to direct sunlight necessary for a specific plant species to produce flowers. The student collected the data below.167640043815001. Organize the data collected, from shortest to longest length of exposure, in the data table below. 12287255715002. At the end of the experiment, the student stated that if plants are exposed to more hours of daylight, they will always produce a greater percentage of flowers. Is this a valid conclusion? ______Support your answer using numbers from the data table.__________________________________________________________________________________________________________________________________________________________________________________________Data Analysis #3 (20 points)Read the information below and analyze the data. Use the information from the reading, the data shown and your knowledge of the living environment to answer the questions that follow.Fertilized eggs containing embryos from the same species of alligator were incubated at different temperatures. The sex of the hatched offspring is shown in the table below.-190500-635001. How many more females hatched than males? Show work here!My answer is: ______2. Which conditions are worst for the hatching of females? Cold or warm? ________3. A review of this data could lead to the conclusion that(1) the most alligator eggs hatched if incubated at 26°C(2) the sex of the offspring depends on the incubation temperature(3) female alligators develop at higher temperatures(4) temperature doesn’t affect the survival of alligator embryos4. The percent of surviving females at 32°C from the original number of eggs incubated was(1) 13% (2) 2% (3) 85% (4) 98%Data Analysis #4 (15 points)Read the information below and then analyze the graph. Use the information from the reading, the graph shown and your knowledge of the living environment to answer the questions that follow.A group of science students have been learning how the human circulatory system reacts during exercise. The students measured their heart rates both before and after they ran five laps around the school gym. This was repeated two more times, with a 5-minute rest period between each trial. The average heart rates of the students are shown in the bar graph. 12573005715001. Use the data from the bar graph to complete the data table below132397541275002. State the general relationship between exercise and heart rate in humans. ____________________________________________________________________________________________________________________________________________________________________________Data Analysis #5 (10 points)Read the information below and analyze the data. Use the information from the reading, the data shown and your knowledge of the living environment to answer the questions that follow.An experiment was set up to test the effect of light intensity on the rate of photosynthesis, as shown in thediagram below. Data were collected by counting gas bubbles released in a 5-minute period when the light source wasplaced at various distances from the experimental setup. The data are shown in the table below. 8832851270000341947526035001. The number of bubbles released when the light source is at a distance of 38 centimeters would most likelybe closest to(1) 6 (2) 10(3) 13(4) 222. Sketch a graph of the data on the axes below. Label the axes, but do not number them.249555013271500Data Analysis #6 (5 points)Read the passage below. Use the information from the reading passage, and your knowledge of the living environment to answer the question that follows.Signs of a Changing PlanetWhile the changing climate endangers some species, a little global warming suits many shallow-water squid and octopuses just fine. Slightly higher ocean temperatures have been shown to boost the growth of these cephalopods, whose digestive enzymes speed up when warm. The tentacled creatures are also quick to colonize new territoryas conditions become more favorable. Humboldt squid, which usually range from Southern California to South America, have been spotted as far north as Alaska. Deep-sea squid may not, however, adapt as readily.Sierra Magazine, March/April 2005334327546418500-171450378460001. Circle the graph most accurately shows the interaction between water temperature and digestive enzyme action in the shallow-water squid? Data Analysis #7 (10 points)Read the passage and analyze the data. Use the reading passage, the data shown and your knowledge of the living environment to answer the questions that follow.933450720090Honeybees have a very cooperative way of living. Scout bees find food, return to the hive, and do the “waggle dance” to communicate the location of the food source to other bees in the hive. The waggle, represented by the wavy line in the diagram below, indicates the direction of the food source, while the speed of the dance indicates the distance to the food. Different species of honeybees use the same basic dance pattern in slightly different ways as shown in the table below1. State the relationship between the distance to the food source and the number of waggle runs in 15 seconds. ____________________________________________________________________________________________________________________________________________________________________________2. Explain how waggle-dance behavior increases the reproductive success of the bees. ____________________________________________________________________________________________________________________________________________________________________________Data Analysis #8 (10 points)Base your answers to questions 1 and 2 on the graph below and on your knowledge of science. Thegraph represents the changes in elevation in meters (m) of a stream. Letters A through E represent locationsin the stream at different distances in kilometers (km) from point A where the stream begins. Complete the data table below, using data from the graph. Fill in the distance from the beginning of the stream to each lettered location along the stream. 504825635000160972526670 ................
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