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19 Cards in this Set
- Front
- Back
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Hypothesis |
An educated guess that says what you think will happen. A hypothesis should always include WHY you think your guess is right, and your hypothesis should include the word because. A hypothesis is based on what you know. |
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Theory |
A scientific explanation based on evidence from many experiments. A theory is accepted as true by scientists. For example, when we talk about gravity, we talk about "the theory of gravity" |
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Scientific Law |
A statement of what always happens in science. Unlike a theory, a law is not an explanation of why something happens, just a statement that something does happen. |
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Chemistry |
The study of matter and its interactions. Or, the study of all the stuff of the universe, and how it reacts with other stuff. |
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Matter |
Anything that takes up space (has volume) and has mass. Matter is all the "stuff" of the universe. |
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Accuracy |
How close an answer is to the right answer. Accurate answers do not have to be precise, so accurate answers, as long as they are close to right, do not have to be specific. |
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Precision |
How specific a measurement it. If you repeat a measurement, precise answers should be very close together. You can also tell how precise a measurement is by how many numbers after a decimal point you have. A precise answer (one with a lot of decimal points) does not always mean a right answer. |
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Scientific Notation |
A way of writing very big or very small numbers. For example 10304.3 in scientific notation is 1.03043 x 10^4 0.00098 in scientific notation is 9.8 x 10^-4 |
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Significant Figures |
The amount of digits, or individual numbers, in a number that matter for calculations. |
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Kelvin |
A system of measurement that is based on absolute zero, which is the coldest temperature possible. 0K is absolute zero |
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Fahrenheit |
A system of measurement where water freezes at 32 degrees F and boils at 212 degrees F. |
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Celsius |
A system of measurement where water freezes at 0 degrees C and boils at 100 degrees C. |
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Observation |
A statement of what you notice through sight, sound, touch, smell, or taste. |
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Claim |
A statement that you will try to prove. Your opinion or answer to a question. |
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Evidence |
Facts that support your claim. Evidence is examples taken from observation, an experiment, or something you read or researched. |
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Reasoning |
Why your evidence backs up your claim. Reasoning is your opinion, and it is based on logic. |
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Unit of Measurement |
A way we know what a measuremnt means. Examples: meters, yards, gallons, liters, degrees celsius, grams, pounds, etc. |
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Conversion Factor |
A way to get from one unit to a different unit. Can we written as a fraction. Example there are 3 feet in 1 yard. There are 1000 grams in a kilogram. |
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Metric Prefixes |
Prefixes that come before a unit of measurement that tell us how big or small it is. Examples: Centi, milli, kilo, giga, mega, and nano give us Centimeters, milliliters, kilograms, gigabytes, megabytes, and nanometers |
