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39 Cards in this Set
- Front
- Back
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tecnology is the
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application of scientific knowledge to solve problems
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basic research is
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carried out for the sake of increasing knowledge
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applied research is
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carried out to solve a problem
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which of the following is an example of matter?
air heat light sound |
air
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two features that distinguish matter are
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mass and volume
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Cesium melts at 28,5 C and boils at 705 C . if the temperature of a piece of cesium is at 152 C, what is the physical state of the metal?
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liquid
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the substance that are chemically bound together are...
the gases in the air? the elements that compose water? dust particles in air? substance in blood? |
the elements that compose water
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physical means can be used to seperate
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mixtures
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elements in a group in the periodic table can be expected to have...
atomic masses? atomic numbers? similar properties? number of neutrons? |
similar properties
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the state of matter in which the substance has a definite volume but an indefinite shape
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liquid
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that state of matter in which the substance has a definite volume but an indefinite shape
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liquid
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anything that has mass and takes up space
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matter
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any substance that has a definite composition
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chemical
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a substance that reacts in a chemical change
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reactant
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a horizontal row of elements in the periodic table
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period
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the state of matter in which the substance has definite volume and definite shape
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solid
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a reaction in which one or more substances are converted into diff substances
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chemical reaction
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a measure of the amnt of matter
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mass
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a high temperature physical state of matter in which atoms lose their electrons
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plasma
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a substance that is formed by a chemical change
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product
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a vertical column of the periodic table
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group
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the state of matter in which a substance has neither definite volume nor definite shape
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gas
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an explanation of how phenomena occur and how data or events r related
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model
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the closeness of a set of measurements of the same quantity made in the same way
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precision
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a testable statement
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hypothesis
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the amnt of space occupied by an object
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volume
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something that has magnitude, size, or amnt
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quantity
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a broad generalization that explains a body of facts or phenomena
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theory
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the ratio of mass to volume or mass divided by volume
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density
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a logical approach to solving problems
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scientific method
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a specific portion of amtter in a given region of space that has been selected for study
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system
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a ratio derived from the euquality between two different units
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Conversion factor
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the closeness of measurements to the correct or accepted value of the quantity measured
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accuracy
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a unit that is a combination of SI base units
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derived unit
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the measure of the gravitational pull on matter
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weight
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any digit in a measurement that's known with certainty plus one final digit, which is somewhat uncertain or is estimated
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significant figure
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the measurement system accepted worldwide
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SI
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symbolized by the letter Z
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atomic number
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sumbolized by letter A
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mass number
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