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Types of investigations, Discriptive investgations, orange team bru -…

- - - - Comparative investigations work by gathering items and comparing them for the investgations
    - - Dr
      - Experimental investigations
    - - This is where they collect important
- - - - In a controlled experiment, all variables other than the independent variable are controlled or held constant so they don't influence the dependent variable. Controlling variables can involve: holding variables at a constant or restricted level (e.g., keeping room temperature fixed).
        
        (example)
        Image result for what is controlled experiment
        For an example of a control group experiment, a researcher conducting an experiment on the effects of colors in advertising, asked all the participants to come individually to a lab. In this lab, environmental conditions are kept the same all through the research.Nov 9, 2021
    - - https://www.youtube.com/watch?v=J9kCgWAuB0Y&ab_channel=BioManBiology
      - Variables are factors in a system or an experiment that can change. You must identify all the possible variables and describe what type of variable each one will be. There are three types:
    - - An experiment in which all variables are held constant except one.
        
        All subjects in an experiment are compared with one or more controls. In the corn experiment, the plot of corn that received no fertilizer is the control.
        
        they are used to judge whether and how the subjects in an experiment are affected. A control can be an object, a condition, or a set of either one or both. A control often has a zero amount or base-line level for the manipulated variable in the experiment.
- - - - Being objective means not including your preferences in your work. Collecting a lot of data can ensure that you include most or all of the variations found in nature. Being honest means fully and accurately describing what you observed.
        
        examples
        
        You want to know whose fingerprints were found at the scene of a crime. Those fingerprints will have to be compared with thousands of fingerprint records. A manual search could take days, or even weeks. How much time do you have to spend looking, and how many fingerprint records are you willing to look at to find a match? If your search is too limited, you might not be able to identify the person who committed the crime.
        
        You are having a discussion with a friend. Your friend says that slugs are, on average, bigger than snails. You think snails are bigger. When gathering your data, it would be easy to collect only big snails, leaving out examples that don't support your hypothesis. But this would be an example of a dishonest, biased investigation. You would be manipulating the data to support the conclusion you prefer.
        
        You want to know whether chemicals in tap water affect how soaps work. If you study just one sample of water or water collected from only one source, you might not get an accurate result. Some individual samples might have unique characteristics due to their particular conditions. For example, a leaky pipe might change the quality of the water running through it. You won't have enough evidence to support a conclusion
      - To be scientific, investigations must be done fairly and without bias.
  - - - Sometimes you will use several tools in the same investigation
    - - Comparative investigations are the investigations that involve observing the ways in which two or more objects,events or processes are similar and different
        
        A comparative investigation can take a long time. Using the appropriate tools and technology can help you speed things up and improve the quality of your results.