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| A method of doing research that includes the steps of identifying a problem, gathering data, forming a hypothesis, testing a hypothesis, and drawing a conclusion. |
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| An explantion that can be tested. It is an educated guess. |
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| Any factor in an experiment that can change |
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| An explanation of things or events based on scientific knowledge that is the result of many observations and experiments. The big bang theory and the theory of relativity are examples. |
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| A statement about how thigs work in nature that seems true all the time. An example is the Universal Law of Gravity or Newton's laws of motion. |
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| The factor in an experiment that is changed on purpose by the person conducting the experiment. It is also called the manipulated variable because it is the factor you wish to test. It is expressed in the hypothesis after the word if. This variable is plotted along the x-axis. |
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| The factor that is not known prior to the experiment, but is measured and collected as data. This variable is expressed after the word then in a hypothesis. This variable is plotted along the y-axis. |
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| Factors that do not change between the test group and the control group. Keeping all factors the same except one is essential for comparing test groups to the control. |
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| The standard to which the results of a test is compared. It has all factors the same as the experimental group except it does not have the factor being tested (the independent variable). |
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| The act of looking at something in detail using the senses and /or measuring tools to collect information. |
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| A test or trial performed in order to determine if two factors are related and if the hypothesis is supported or not supported. |
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| A sequence of steps involved in performing an experiment. |
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| A logical answer to a question based on data and observation. Conclusions explain whether the hypothesis should be accepted or rejected. |
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| The test group which receives the independent variable. It has all the factors of the control group, but also the one factor being tested (the independent variable). |
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The X-axis on a graph. The direction is sideways
(<---------------------->)
The Independent variable belongs on the horizontal
x-axis.
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The Y- axis on a graph.
^
l
V
It is in the up and down direction.
The Dependent variable belongs on the Y- axis |
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An exact quantity that people agree to use to compare measurements. |
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Stands for Systeme Internationale d'Unites.
These are standards universally accepted and understood by scientists around the world. Each type of measurement has a base unit which is a multiple of 10. |
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| The distance between two points. SI base unit is the meter, m. |
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| The amount of space occupied by an object. |
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| The measurement of the quantity of matter in an object. This measurement does not vary as gravity changes. The SI base unit is the kilogram, kg. |
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| The mass per unit volume of a material. It is an object's mass divided by the object's volume. |
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| The SI unit of temperature. Celsius plus 273 gives a reading in Kelvin. |
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Zero Kelvin or -273 0Celsius.
It is the coldest possible temperature. |
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