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35 Cards in this Set
- Front
- Back
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When there is a balance between changes, it is called _____.
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dynamic equilibrium
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What is a prediction?
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A prediction is an inferance based on observations that indicate what will happen in the future.
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What is an observation?
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An observation is an interaction of one or more of the senses- sight, hearing, touch, taste, or smell- with the enviornment or surroundings
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What are some examples of intruments?
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Some examples of intruments are a telescope which allows us to look at the stars closer, and a scale which determines weight.
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What are the two measurement systems in use today?
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The Metric and English Systems
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A _______ is a means of describing observations using numbers.
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measurement
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What are instruments?
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Instruments improve our ability to observe and to make measurements that would otherwise be very inaccurate or even impossible to make.
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T or F: The greater the mass of substance, the less its volume will be.
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False: The greater the mass of a substance, the greater its volume will be.
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The weight of a body may change with its location, and the mass _______
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naver changes.
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What is time?
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Time is the instent at which something happens or the period during which a change occurs.
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What is density?
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Density is the quantity of a material contained in a cirtin amount of space. For example, something densly packed has a large quantity of material crowded into a small amount of space.
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What is the balance between two forces?
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Equilibrium
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What is a frame of referance?
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A frame of referance is a basis for comparison.
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What kind of graph has both variables increasing?
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A direct
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T or F: No matter how large or small the sample, or what shape it is, the density of a spacific substance remains the same.
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True
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What type of graph has the independent variable increasing, and the dependent variable remaining the same?
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Static
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The boundary between two different materials or systems is called an ______.
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Interface
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What type of graph has a repeating pattern?
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Cyclic
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What is classification?
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Classification is the grouping of objects and events. Classification is based on observable properties. Classification makes observations more meaningful.
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What is the rate of change?
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How long something takes to occur
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What is an event?
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An event is when the properties of matter or a systema are altered.
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What is the amount of matter in an object?
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Mass
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What is change?
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Change is the occurance of an event.
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What type of graph has the independant variable increasing, while the dependent varible decreases?
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Indirect ot inverse
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What does the phase(state) of a sample of matter depend on?
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How closely packed the particals are.
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Objects denser then water will_____ in water.
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Sink
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What is volume?
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Volume is the amount of space an object takes up. The formula for volume is V=lwh, and is usually expressed in cubic centimeters (cm3)
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At what temperature does water have its greatest density?
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4 degrees C, while it is still liquid
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_______ is a measure of force or weight on a given area.
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Pressure
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What is an inference?
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An inferance is an interprtation of one or more observations.
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What is percent-deviation from accepted value?
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It is the differance between the measured value and the accepted value divided by the accepted value and multipled by 100%. It is used to find the percentage error.
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What is speed?
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Speed is a maesure of the rate of motion.
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On earth's surface, what is weight?
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Weight is a measure of the pull of gravity on a quanity of matter.
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What is a measure of distance between two points?
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Length
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What is a standard unit?
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An accepted measurement aginst which other measurements can be compared.
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