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Chapter 1

The World of Physical Science

Science The process of gathering information about the natural world.
Physical Science The study of matter and energy.
Matter The "stuff" that everything is made of.
Chemistry The study of all forms of matter, including how matter interacts with other matter.
Physics The study of how energy affects matter (Motion, force, gravity, electricity, light, and heat).
Steps of the Scientific Method Question/Observation Form a Hypothesis Test/Experiment Analyze the Data/Results Draw Conclusions Communicate/Present Results
Hypothesis A possible explanation or answer to a question that is based on prior scientific research or observations.
Theory An explanation that ties together many hypotheses and observations (highly supported by results and research, not just an idea).
Law A summary of many experimental results and observation (a scientific fact).
Model Pattern, plan, representation, or description designed to show the structure or workings of an object, system, or concept.
Independent Variable The variable in an experiment that is being tested. The variable in an experiment that the scientist changes.
Dependent Variable The variable in an experiment that changes as a result of what is being tested.
Mass A measure of the amount of matter in an object.
Volume A measure of the size of an object.
Density The amount of mass within a specific volume.
Temperature How hot or cold something is.
80mm = _______cm 8 cm = _______mm
110mm = _______cm 11 cm = ______mm
Kilometer Used to measure long distances in the metric system
Square Meter Used to measure volume of a solid object in the metric system
Liter Used to measure volume of liquid in the metric system.
Gram Used to measure mass in the metric system.
Line Graph A ____________ graph shows how changes in a variable affect another quantity. (especially good for showing change over a period of time).
Bar Graph A ____________ graph is best used to compare two quantities with one another.
Pie Graph / Circle Graph A ____________ graph is best used to see how a quantity is a percentage of the whole.
Created by: Kenmore Science