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48 Cards in this Set

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