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Intro to Biology

Intro to Biology. By: Danny Sandler, Miles Loef , Nick Day, William Bonny, Alex Grillo. Types of Data. Qualitative- Describes the physical features of an experiment I.e. The lady bug is red and has black spots Quantative - A numerical description of an experiment.

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Intro to Biology

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  1. Intro to Biology By: Danny Sandler, Miles Loef, Nick Day, William Bonny, Alex Grillo

  2. Types of Data • Qualitative- • Describes the physical features of an experiment • I.e. The lady bug is red and has black spots • Quantative- • A numerical description of an experiment. • I.e. The lady bug has four black spots.

  3. Dependent Variable • Located on y-axis • Is manipulated by the independent variable • Is generally a numerical value • Is the data being observed

  4. Hypothesis • A testable statement that can be proven true or false. • A possible explanation for a set of observations or a possible answer to a scientific question. • An educated guess of what the result of the experiment will be

  5. What Graphs Need • A title telling the reader what the graph is about • A key or legend labeling colors and symbols • Labels on the x and y-axis

  6. Rates of Data Collection • Why do scientists pay more attention to graphs with many years of data rather than year to year? • -Scientists pay more attention to graphs with many years of data because they can see the long term trends.

  7. Conclusion paragraphs in a lab report • A conclusion paragraph contains a description of the purpose of the experiment, a discussion of your major findings, an explanation of your findings, and recommendations for further study. Purpose Restated Major findings restated Revisit hypothesis Suggest improvement to lab Suggest extension to lab

  8. Restate purpose • Restate the overall purpose of the experiment • Ex: The purpose of this experiment was to find the average number of spots on lady bugs on southern California.

  9. State the major finding(s) • Summarize the collected data/results. • Ex: The average number of spots on lady bugs was 5

  10. Revisit hypothesis • State if the hypothesis was correct/incorrect • Ex: The hypothesis that the average number of spots on lady bugs in southern California would be 5 was supported.

  11. Suggest improvement • Give an example of how the lab could be improved in the future • Ex: This lab could test the average amount of spots in different seasons rather than just at one point in the year

  12. Suggest Extension to lab • What could the data be used for? What new experiments could be created? • Ex: Additional investigations could involve the amount of lady bugs in each season and how, if at all, the seasons affect the average number of spots.

  13. Independent/ Experimental Variable • Located on x-axis • It is intentionally manipulated • Directly changes or affects the dependent variable • It is the only variable changed trial to trial • Can also be referred as the experimental variable • because it is the factor that is changed tested or manipulated

  14. Anatomy of a Line Graph Title Kg Y-Axis Labels Letters X-Axis

  15. Anatomy of a bar graph kg Letters

  16. Practice Problems

  17. 1. Defining a hypothesis • True or False: A testable statement that can be proven.

  18. 2. Where on a graph is the dependent variable located? • A x-axis • B y-axis • C origin • D none of the above

  19. 3. Types of Data • True or False: Quantitative data records numerical data.

  20. 4. Types of Data • True or False: Qualitative data is always the independent variable.

  21. 5. Why is it important for an experiment to contain a control? • A Because it is a controlled experiment • B To waste time • C To compare and contrast data • D Because Mrs. Lawless said so • E None of the Above

  22. 6. Which is not a part of a conclusion? • A Purpose • B Reason for experiment • C Major findings • D Restatement of hypothesis

  23. 7. Which is a key component of a conclusion? • A Time spent • B Improvements to the experiment • C The pH of the test subject • D None of the above

  24. 8. Time Trends • True or False: Scientists prefer looking at short term trends instead of long term trends.

  25. 9. Which is not part of a proper line graph? • A Title • B Legend • C Segments • D Labels

  26. 10. Which is the proper form of a hypothesis? • A A question • B The answer to the problem • C An educated guess or testable explanation • D Describes all the steps of the lab and how it will resolve the problem

  27. Key • T • B • T • F • C • B • B • F • C • C

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