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Module 1 lesson 1

Module 1 lesson 1






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    Module 1 lesson 1 Module 1 lesson 1 Presentation Transcript

    • Scientific Method
    • What is Science?
      • Observation, identification, description, and explanation of phenomena (occurrences in the world around us)
      • Latin root for the word science is scientia meaning knowledge
      • Through study of science
        • Ask Questions
        • Develop Hypothesis (educated guesses)
        • Design and Carry out Experiments
        • Gain a Better Understanding of the Universe
    • Scientific Method
      • Procedure for studying nature
      • Consists of several steps
        • Make an observation
        • Ask questions
        • Form the hypothesis
        • Set up an experiment
        • Collect the data
        • Draw a conclusion
        • Make a prediction
    • Making Observations and Defining the Problem
      • Observations are made by using the five senses (sight, touch, smell, sound, and taste) to obtain information
      • Making observations may lead to identifying problems
    • Asking Questions
      • By asking questions we can search for logical explanations of what we observe and find ways to solve problems
    • Sample Experiment
      • Asked to observe marine snail behavior in an aquarium
      • Tank contains several snails at one end and a mussel (food) at the other end
      • Observe snails climbing the aquarium and swarming all over the food
      • What is the problem?
    • Forming the Hypothesis
      • After observing and asking questions we can form an opinion about how or why something happens
      • Hypothesis – statement that gives the best possible response to the question
        • Based on already known facts
        • Educated Guess
    • Setting Up the Experiment
      • Should give accurate and measureable results
      • Should be designed to collect information
      • Goal is to prove or disprove a hypothesis
      • Set up to examine only one condition (variable) at a time to give meaningful data
    • Sample Experiment
      • Materials:
        • Aquarium
        • Food
        • Seawater
        • Graduated cylinder
        • Snails
        • Metric ruler
    • Sample Experiment
    • Sample Experiment
    • Experimental Variables
      • Independent Variable – factor that is changed or manipulated during an experiment in order to determine the effect of the change
      • Dependent Variable – the factor that the experimenter is measuring or counting
        • Changes in response to the independent variable
      • Control Variable – all other factors in an experiment
        • Things that the investigator attempts to control
        • Goal is to keep them the same for all samples
    • Experimental Groups
      • Control Group
      • Variable (Experimental) Groups
    • Collecting Data
      • Gathered from observations and measurements taken during an experiment
      • Qualitative Data – information that cannot be assigned a numerical value
        • Usually collected using the five senses
      • Quantitative Data - anything that can be expressed as a number or quantified
        • Include lengths, weights, masses, volumes, time, anything expressed as a number
      • Observations must be recorded
    • Organizing Data
    • Organizing Data
    • Draw Conclusion
      • Based on data
      • Support hypothesis
      • Snails move faster in the presence of food