Unit 1: Scientific method and graphing

Master the scientific method & graphing! Practice identifying variables & interpreting data.

Review of Scientific Method Watch this video to review before completing the questions below: CLICK HEREPlay this game before completing the questions below: CLICK HERE Match the vocabulary words to the correct definitions. Hypothesis A testable prediction Control Group that receives the "normal" conditions Independent/ Manipulated Variable The variable that the scientist changes Dependent Variable The variable that is measured Constant A condition during the experiment that stays the same for all groups being tested Observation Using your five senses to determine information Inference Drawing a conclusion using the evidence at hand Global Warming Experiment Iker is concerned about global warming. He believes that much of the problem is caused by the intense heat arising from surfaces such as streets and the roofs of buildings. Iker convinces the principal of his school to run an experiment. With the help of other students, Iker raises money for a rooftop garden to be put in on one half of his school building. For one semester, Iker keeps track of the air temperature on the half of the building with the rooftop garden and the half of the building without the garden. He finds that the average temperature near the rooftop garden is 73°F. The average temperature away from the garden is 84°F. What is the Independent Variable for the Global Warming Experiment? Air Temperature Location Global Warming Time of Day What is the dependent variable for the Global Warming Experiment? Air Temperature Location Global Warming Time of Day What is a constant in order for the Global Warming Experiment to be valid? Air Temperature Location Global Warming Time of Day According to the data shown in the graph, the hypothesis is only correct for latitudes- up to 40 degrees from the equator from the poles to 40 degrees from the equator between 20 degrees and 60 degrees from the equator farthest from the equator How much limestone was worn away between Day 1 and Day 2? 2.5 grams 2.8 grams 0.2 gram 2.3 grams According to this graph what type of rock or mineral is most resistant to erosion? Sandstone Igneous Fossils Quartz According to this graph, which rock or mineral erodes the fastest? Sandstone Limestone Granite Quartz Use the graph below to answer the questions that follow: 1. What is the dependent variable in this graph? Students2. What is the independent variable in this graph? Scores3. Which score was the most abundant score for this group of students? 804. Which score was the least abundant score for this group of students? 100 A student constructs several terrariums like the one shown below. Each terrarium is exposed to a different amount of sunlight each day. In order to determine the ideal amount of sunlight, which of the following variables must be held constant? Type of Plant Growth Rate of Plants Wavelengths of sunlight Amount of sunlight received What is the independent variable in the experiment above? Growth rate of plants Amount of sunlight each terrarium is exposed to type of soil What is the dependent variable in this experiment? Growth rate of plants Amount of sunlight each terrarium is exposed to type of soil A student wanted to compare the transpiration rates of two different plant species at varying levels of humidity. The results are recorded in the table shown. Each plant group was given the same amount of water and light throughout the investigation. Which procedure should have been performed to prevent error in this investigation? One type of plant should have been tested Fewer plants should have been included in each group The percentage of humidity should have been kept constant Both groups should have been tested in the same soil type at each humidity level The diagram below shows a setup for a plant investigation. Which variable is most likely being tested? Hours of light exposure Plant species Soil Volume Soil pH A biologist gathered data to show the interaction of the golden-cheeked warbler and juniper tree populations. Which conclusion did the biologist most likely make from the data shown? A golden-cheeked warbler population is unable to survive if juniper trees are present. The golden-cheeked warbler population stabilizes when the juniper tree populationincreases above 120 trees per acre. As the juniper tree population increases, the golden-cheeked warbler population increases. The optimum habitat for the golden-cheeked warbler population is 100 juniper trees per acre.