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Vocabulary Part 1

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Science A way of learning about the natural world.

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Observing Using one or more of your senses to gather information.

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Inferring When you explain or interpret the things you observe.

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Predicting Making a statement or a claim about what will happen in the future based on past experience or evidence

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Classifying Grouping together of items that are alike in some way.

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Evaluating Comparing observations and data to reach a conclusion.

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Hypothesis A possible answer to a scientific question (educated guess).

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Variable Factors that can change in an experiment.

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Independent Variable Factor that is changed to test a hypothesis.

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Dependent Variable Factor that changes in response to the independent variable.

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Controls Parts of an experiment that never change.

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**Controlled Experiment**

An experiment in which only one variable is changed.

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Data Facts, figures, and other evidence gathered through observation.

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Quantitative Observations that deal with numbers (quantity).

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Qualitative Observations that deal with descriptions that cannot be expressed in numbers (quality).

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Metric System Measurement system based on the number 10.

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**SI (International System of Units)**

Version of the metric system used by modern scientists.

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Mass A measure of the amount of matter in an object (mg, g, kg).

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Weight A measure of the force of gravity acting on an object.

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Volume The amount of space that an object or substance takes up (L, mL, m3, cm3).

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Meniscus The bottom curve of a liquid, used to measure volume.

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Density A measure of mass in a given volume (kg/m3, g/cm3, g/mL).

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Graph A picture of your data.

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Linear Graph Data points follow a straight line.

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Nonlinear Graph Data points do not follow a straight line (often curve).

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