Scientific Method 2nd Year Science CBA1

Scientific method or scientific skills video The Scientific Method Match the steps of the Scientific Method with the correct description by clicking on a step in the left column and then the correct description in the right column. A line will be drawn between the two. Analyze Data Looking for patterns or trends in data. Conclusion Final summary of the experiment. Experiment Designed to test the hypothesis. Hypothesis Write as an “If... then…” statement; MUST BE TESTABLE; educated testable prediction State the Problem What is trying to be figured out; stated as a question containing words like How, Why, and What. Parts of an experiment. Match the parts of experiment with the correct description by clicking on a term in the left column and then the correct description in the right column. A line will be drawn between the two. Constants Everything else in the experiment besides the variables; held the same to make sure only the independent variable is affecting results Control A standard for comparison; usually a trial of the experiment where the independent variable is totally absent Dependent Variable Also called the responding or measured variable, what is measured during the experiment as the independent variable is changed Independent Variable Also called the manipulated or controlled variable; what the experimenter controls or changes during the experiment to test the hypothesis The correct sequence of activities in a scientific investigation are to… gather information, test the hypothesis, form the hypothesis, and make observations state the problem, write a hypothesis, conduct an experiment, analyze data, and write a conclusion state the problem, gather and analyze data, perform an experiment, and form a conclusion experiment, form the hypothesis, record the data, and state the Conclusion Directions: Read the following scenario, then answer the questions below.In the laboratory, yeast cells are usually grown at a temperature of 25oC. A scientist wanted to determine if yeast cells would reproduce faster or slower when the temperature was dropped to 15oC. The same starting number of yeast cells (25 yeast cells) were placed in the same material with the same amount of nutrients. One sample was kept at 25oC and the other one was kept at 15oC. The number of yeast cells was counted every hour for an eighteen hour period. At the end of 18 hours, there are 87 yeast cells in the sample at 25OC and 32 in the sample at 15OC. Which of the following is an appropriate statement of the problem? Will changing the temperature affect the reproduction of yeast cells? Will giving yeast cells more food affect the reproduction rate? Yeast cells grow best when at 25OC. Yeast cells grow best when at 15OC. Which of the following is an appropriate hypothesis? If the temperature of yeast cells is altered, then they will eat more. Yeast cells will not reproduce unless held at 25OC. Yeast cells prefer a cooler temperature for reproduction. If the temperature of yeast cells is altered, then they will reproduce at a more rapid rate. Based on the experiment above, match each term with the correct statement below.Some options may be used more than once. Number of yeast cells at the end of 18 hours. Dependent Variable Starting number of yeast cells. Constant Yeast cells at 25°C. Control Material yeast cells were placed in. Constant Nutrients in material. Constant Temperature decreased to 15°C. Independent Variable