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44 Cards in this Set
- Front
- Back
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What is science?
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observing, studying, and experimenting to find the nature of things
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What is technology?
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the application of science for practical uses
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What is a law?
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describes a process in nature that can be tested by repeated experiments
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What is a theory?
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an explanation of how a natural process works
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Why might a scientist perform experiments? ( 4 answers )
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1. to find a new aspect of the natural world
2. to explain a known phenomenon 3. to check the results of other experiments 4. to test the predictions of current theories |
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Most of the time, what is natural science divided into?
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biological science, physical science, and earth science
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To be valid, what must a theory continue to do?
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1. explain observations clearly
2. experiments performed on a theory must be repeatable 3. you must be able to predict results from a theory |
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What is the caloric theory?
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heat was thought to be an invisible fluid called caloric, which flowed into surrounding objects and made them warmer( 200 yrs. ago )
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What is critical thinking?
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approaching a problem by asking questions, making observations, and using logic
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What are scientific methods?
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general ways to help you organize your thinking about questions. Observe, ask a question, collect data, form a hypothesis, test it, observe, and draw conclusions, and communicate results
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What are variables?
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a factor that changes in an experiment in order to test a hypothesis
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What is length?
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measure of the straight-line distance between two points
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What is mass?
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measure of the amount of matter in an object
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What is volume?
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measure of the size of a body or region in three-dimensional space
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What is weight?
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measure of the gravitational force exerted on an object
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What are some of the most important science skills?
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identifying problems, planning experiments, and recording data
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What unit of measurement do scientists use?
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SI units
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What is scientific notation?
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to reduce the number of zeros in very big and very small numbers. You can express the values as simple numbers multiplied by a power of 10
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What is precision?
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the exactness of a measurement
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What are significant figures?
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they show the precision of a measured quantity
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What is accuracy?
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how close a measurement is to the value of the quantity measured
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Why are organizing and presenting data important science skills?
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because scientists use written and oral presentations to share their results
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How do scientists explore the world?
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they perform experiments
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How are the many types of science organized?
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into branches
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What are scientific theories and how are they different from scientific laws?
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a law describes a process in nature; a theory is a system of ideas that explains many related observations and is supported with a large body of evidence
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What is a hypothesis?
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a possible, testable answer to a question
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What is a scientific method?
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a series of logical steps that can be used to solve a problem
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What is usually the independent variable?
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time
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What is the abbreviation for a kelvin?
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K
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What is the abbreviation for an ampere?
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A
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What is the abbreviation for a mole?
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mol
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What is the abbreviation for a candela?
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cd
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What does mega- mean?
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million
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What does giga- mean?
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billion
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What does milli- mean?
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thousandth
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What does micro- mean?
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millionth
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What does nano- mean?
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billionth
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What equipment do you need in order to find the mass of something?
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balance
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What equipment do you need in order to find the weight of something?
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scale
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What do line graphs show?
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continuous changes
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What do bar graphs show?
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compare the values of items
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What do pie graphs show?
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the parts of a whole
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What is the correct format for a hypothesis?
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If, then, because: IF i do (this), THEN it will (do this), BECAUSE (the reason)
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What is the correct format for a conclusion?
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restate purpose, is hypothesis correct?, results and error analysis
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