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18 Cards in this Set

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Conclusion.


A short summary of what was found in the experiment.

Continuous Data.

Has values the exist between those tested in the experiment. EG- time, height, aga, temperature, length and weight.

Controlled Variable.

All variables that must not change throughout the experiment, to ensure a fair test.

Dependent Variable.

The variable being measured by the experimenter. Changes because the independent variable is changed.

Discontinuous Data.

Separated into catergories. EG- colour, blood type, chemical type, Bunsen Burner flame and animal type.

Errors. (Types and Impacts of)

Parallax- Not having your eye directly in line with the measurement.


Reading- Due to estimations needed when looking for a colour change, or when a measurement falls between an instrument's markings.


Instruments/Equipment- Due to an instrument's limitations, or using equipment at a temperature it is not designed for.


Human Reflex- The differing reaction rate between experimenters.


Zero Errors- Due to instruments giving a higher or lower readign when they should be zero.

Fair Test.

A fair test is making sure you have no mistakes preforming multiple trials and making sure all equipment is correct.

Hypothesis.

An 'educated guess' about what might happen in the experiment.

Independent Variable.

The variable changed by the experimenter. Usallly causes a change in the dependent variable.

Mistakes.

Mistakes can be avoided with care.

Observation.

An dobservation is taking a measurement or recording some type of data.

Qualitative Data.

Comes from observations that are descriptive only.

Quantitative Data.

Comes from measurements that use numbers. (and usally units)

Reliable Data.


Reliable data is data that is reproducible.


1. Multiple trails are prefromed.


2. The results are consistent.


3. An average is calculated.

Risk Assessment.

Risk is the possible of suffering harm or loss. It is important to minimise risk in an experiment.

Scientific Method.


1. Ask a question.


2. Do background research.


3. Construct a hypothesis.


4. Test with an experiment.


5a. Record results.


5b. Analyse results.


6. Refer to hypothesis.


7. Report hypothesis.

Variables.

Factors that might have some influence on an experiment.

Valid Data.


Valid data is data that is relevant and fair. A method will be on valid if:


1. It is based on the aim of the experiment.


2. It incorporates suitable equipment.


3. Othe variables are controlled.


4. Appropriate measuring procedures are included.