Presentation on theme: "Methods of Science Notes Mrs. Pangburn AC Science."— Presentation transcript:
Methods of Science Notes Mrs. Pangburn AC Science
Watch the following video and take notes. You should be able to answer the following questions… What are the steps of the scientific method and what happens in each step? What are the different types of variables and how do they differ? What is the difference between quantitative data and qualitative data? How do you set up and label a graph? What are the three parts in writing a conclusion?
1. Ask a Question Collect information Make observations ASK YOURSELF : What question will I try to answer?
2. Hypothesize A hypothesis is a testable explanation of a situation or testable prediction of events ASK YOURSELF : Is my prediction testable?
3. Experiment Investigate to test the hypothesis When designing an experiment there are certain elements that must be present to make the test reliable: Control group – a group used for comparison Experimental group – the group exposed to the factor being tested Only one factor can change at a time. Constants – factors that remain fixed or the same Independent variable (IV) – the factor that is manipulated Dependent variable (DV) – the responding factor For example: In the experiment testing how different types of fertilizer affects the growth of plants. IV – the different types of fertilizer DV – the growth of plants Constants – the plants tested will be of the same species and will receive the same amount of sunlight, water, and soil. Conduct sufficient testing Perform at least three trials ASK YOURSELF : What materials and equipment will I need?
Remember…. DRY MIX D – dependent variable is the R - response you are looking for & goes on the Y – y-axis of a graph M – manipulated variable is the I - independent variable and goes on the X – x-axis of a graph
4. Gathering Data Quantitative – data collected as numbers or numerical data Qualitative – descriptions of what are senses detect Create a chart to collect data. ASK YOURSELF : How will I record my data?
5. Analyzing Data When analyzing data, organize the information from your chart into a graph. Use a line graph when possible. Look for patterns ASK YOURSELF : How will I display my data?
Title should contain the independent and dependent variables The Y- AXIS The X- axis
6. Error Analysis Identify factors that you think may have affected the results. Provide suggestions for improvement of the investigation. Calculate: Experimental Results – Standard Results X 100 = % Error Standard Results ASK YOURSELF : Are there any sources of error in my procedure?
7. Conclusion Report your findings: Indicate whether or not your hypothesis was supported in the form of a CLAIM Use data as evidence to support your claims. Make connections to concepts by rationalizing or explaining why the evidence supports the claim. ASK YOURSELF : Was my hypothesis supported? Why or Why not?
Task: The Soapy Sailor Does the type of water (tap, purified, distilled, or ocean water) affect the amount lather (suds) produced?
Answer the following: 1. What is your hypothesis? 2. What is your independent variable? 3. What is your dependent variable? 4. What factors will remain constant?