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48 Cards in this Set
- Front
- Back
The process of trying to understand the world around us
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Science
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The use of knowledge gained through scientific thinking and problem solving to make produts or tools people can use
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Technology
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The step-by-step procedures of scientific problem solving; recognizing the problem, forming the hypothesis, testin the hypothesis, analyzing the data, and drawing conclusions
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Scientific Method
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Bit of information that can be gathered through your eyes, ears, and senses of touch, taste and smell
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Observation
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Conclusion based on an onservation
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Inference
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Statement that can be tested; based on observations, research, and prior knowledge of a problem
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Hypothesis
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The one factor chnged by the person doing the experiment
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Independent variable
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The factor being measured in an experiment
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Dependent Variable
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The factor in an experiment that does not change
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Constant
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The standard used for camparison in an experiment
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Control
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The way to describe the world with numbers; can describe objects and events with length, volume, mass, temperature, and rates
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Measurement
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THe method of making a rough measurement
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Estimation
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International System of Units, which was designed to give a worldwide standard of physical measurement for science, industry, and commerce and uses units such as the meter, cubic meter, kilogram, and kelvin
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SI
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SI unit of length
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Meter
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Amount of matter in an object
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Mass
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SI unit for mass
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Kilogram
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Scale that measures temperature in SI; begins at zero kelvin, which is the coldest temperature possible in nature
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Kelvin
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Ratio of 2 measurements with different units; (ex: miles per hour-mph)
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Rate
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Tool used to display information in rows and columns so that it is easier to read and understand
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Table
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Diagram that shows the relationship; tool used to collect, organize, and summarize data in a visual way so that it is easy to understand
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Graph
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Tool used to show the relationship between 2 variables
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Line Graph
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Tool that uses bars to show the relationships between variables; can be horizontal or vertical and can display any numerical data
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Bar Graph
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Tool used to show the parts of a whole
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Circle Graph
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Anything that has mass and occupies space
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Matter
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Small particle that makes up most types of matter and is made up of smaller parts called protons, neutrons, and electrons
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Atom
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Matter is neither created nor destroyed, only changed in form
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Law of Conservation of Matter
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Negatively charged particle found in a cloudlike formation surrounding an atom's nucleus
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Electron
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Positively charged, central part of an atom; directs all the activities of the cell and is surrounded by a double membrane
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Nucleus
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Particle in the nucleus of an atom that carries a positive charge
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Proton
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Uncharged particle in an atom's nucleus
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Neutrom
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Naturally occurring or synthetic material that cannot be brokem down to simpler materials by ordinary means, has a unique set of properties, and that is generally classified as a metal, a metalloid, or a nonmetal
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Element
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Whole number that tells how many protons are in the nucleus of each atom of an element
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Atomic Number
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Number that tells how heavy an element's atoms are compared with atoms of other elements
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Atomic Mass
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Two or more atoms of the same element that have different numbers of neutrons
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Isotope
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Sum of an atom's protons and neutrons
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Mass Number
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Elements that are malleable, ductile, generally have a shiny or metallic luster, and are not as good conductors of heat and electricity
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Metal
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Elements that are usually dull and are poor conductors of heat and electricity
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Nonmetal
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Elements that have characteristics of both metals and nonmetals. generally are brittle and dull, and are poor conductors of heat and electricity
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Metalloid
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Sample of matter that has the same composition and properties throughout
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Substance
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Pure substance produced when elements combine, and whose properties are different from those of the elements from which it is formed
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Compound
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A given compound is always made of the same elements in the same proportion by mass
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Law of Definite Proportions
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COmbinations of 2 or more substances that have not combined to form new, pure substances; can be uniform, where the individual parts cannot be seen, or nonuniform, where you can see individual parts
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Mixture
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Properties, or characteristics, such as color, texture, and shape, that can be observed without changing the makeup of a material
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Physical Property
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Physical property of a sample of matter-solid, liquid, gas, or plasma
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State of Matter
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Physical property that relates the mass of something to how much space it takes up; divide mass by volume
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Density
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Characteristics of a substance, such as the ability to react with oxygen, that allows it it change to a new substance
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Chemical Property
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Any change in the size, shape, or form of matter in which the makeup of athe matter remains the same and only the physical properties change
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Physical Change
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Any change where one or more of the original materials changes into other materials
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Chemical Change
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