Scientific enquiry

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Text of Scientific enquiry

  • The Scientific

    Method involves a

    series of steps that

    are used to find an

    answer to a

    problem.

  • Do you remember the

    steps of the scientific

    method?

  • 1)Observation

    AHLook at this!

    Observe a problem or

    anything around you

  • Example:

  • Observe the 2 pennies in front

    of you.

    Record your observation.

    Observation Penny 1 Penny 2

    Color Dull Shiny

  • 2) Question

    Develop a question or

    problem that can be

    solved through an

    experiment.

    Q) Will lemon juice clean

    the dull coin?

  • 3) Research

  • After you search the internet

    and the books for information

    you find out that:

    Lemon, vinegar and tomato sauce

    can be use to clean silver and

    metal objects

  • Can you guess an answer to

    your question?

    After you made your

    research,

  • 3) Hypothesis

    An educated guess.

    Lemon juice can be

    used to clean the dull coin.

  • NOW, lets test

    whether our

    hypothesis is right

    or wrong.

  • 4) ExperimentMake a test to test

    whether the hypothesis

    is correct.

    1) Put the coin in the

    lemon juice.

    2) Wait for 5 min. and

    record the results.

  • 5) Record results

    Dull coin

    After 5 min.

    in the lemon

    juice

    Shiny

    In tables, graphs.

  • 6) ConclusionThe answer to the

    question (you state

    whether your hypothesis

    was right or wrong).

    The lemon juice cleans

    the dull coin.

  • Any experiment has

    Variables

  • WHAT ARE

    Variables?

  • Variables

    Variables are things that

    vary and change

  • In any experiment there are 3 variables:

    Independent

    variables

    Dependent

    variables

    Controlled

    variables

    Lets look at each type.

  • Independent (input) variable

    This is the thing that you decide to change.

    Example 1:

    Investigating how a weight

    affects the length of an elastic band.

    You decide the weight to put,

    so:

    Weight is the independent

    variable.

  • Example 2:

    Investigating how the rate of cooling of a

    beaker depends on the initial temperature.

    You decide the initial temperature,

    so:

    initial temperature is the

    independent variable.

  • Students of different ages were given the

    same jigsaw puzzle to put together. They

    were timed to see how long it took to finish

    the puzzle.

    Example 3:

    You decide the ages of the students,

    so:

    Different ages of the students is the

    independent variable.

  • The higher the temperature of water, the

    faster an egg will boil.

    Example 4:

    You decide the temperature of water,

    so:

    Different temperatures of water is the

    independent variable.

  • The temperature of water was measured at

    different depths of a pond.

    Example 5:

    You decide the depth of water,

    so:

    Depth of water is the independent

    variable.

  • This is the variable that changes as a result.

    It is the variable that you measure.

    Example 1:

    Investigating how a weight

    affects the length of an elastic band.

    You measure the resulting length

    of the elastic band, so:

    Length is the dependent

    variable.

    Dependent (outcome) variable

  • Example 2:

    Investigating how the rate of cooling of a

    beaker depends on the initial temperature.

    You measure the temperature

    every minute as it cools, so:

    temperature is the dependent

    variable.

  • Students of different ages were given the

    same jigsaw puzzle to put together. They

    were timed to see how long it took to finish

    the puzzle.

    Example 3:

    You measured time, so:

    Time taken to finish the puzzle is the

    dependent variable.

  • The higher the temperature of water, the

    faster an egg will boil.

    Example 4:

    You measure the time the egg takes to

    boil, so:

    Time is the dependent variable.

  • The temperature of water was measured at

    different depths of a pond.

    Example 5:

    You measure the temperature,

    so:

    Temperature is the dependent

    variable.