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Chapter 1
The World of Physical Science
Term | Definition |
---|---|
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. |