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8th Physical Science

TermDefinition
qualitative observation made by gathering information that can be recorded using descriptive language
quantitative observation made by gathering information that can be recorded as a number with a measurement unit
inference not a fact, but an interpretation of what the direct observations mean
scientific law describes what scientists expect to happen every time under a particular set of conditions
constants part of an experiment that is held in the same condition for control and experimental
variable part of the experiment that changes
manipulated variable a factor in a controlled experiment that is intentionally changed by the experimenter
scientific theory a well tested explanation for a wide range of observations or experiment results
inquiry to ask for information
responding variable a resulting factor in a controlled experiment that is observed and measured to see if it changes due to the manipulation of another variable
experiment a course of action completed in order to test a hypothesis
control a standard to which all other levels are compared in a scientific experiment
physical properties change of shape and appearance but not the object (what it is)
chemical properties a change in matter that makes one or more new substances
matter anything that has mass and takes up space
mass measurement of how much matter is in something
weight a measurement of the force of gravity on you
newton a unit of force required to move one kilogram one meter squared
mechanical advantage the ratio of the output force produced by a machine to the applied input force
gravity a force that pulls objects towards each other
work force exerted on an object that causes it to move
force a push or pull exerted on a nobject
newtons 1st law object in motion stays in motion, object at rest stays at rest
newtons 2nd law the amount of force needed to make an object change its speed depends on the mass ob the object and the acceleration required
newtons 3rd law for every action there is an equal and opposite reacion
accuracy the state of being correct or precise
calibration the process of calibrating an instrument or experimental readings
graduated cylinder a piece of lab equipment that is used to measure the volume of a liquid
International System of Measurement an internationally accepted system of physical units
liquid free flowing but has constant volume
meniscus curved surface of a liquid in a tube
precision the fact of being exact and accurate
triple beam balance a typical mechanical balance, the beam is split into 3 parallel beams that each support one weight
unit individual component of a larger more complex whole
volume amount of space something occupies
pure substance a substance made of only one kind of material having definite proportional amounts and properties
mixture matter that consists of two or more substances not chemically combined
element the simplest type of pure substance
compound two or more elements chemically combined, but appearing to be evenly blended
homogeneous mixture two or more substances not chemically combined, and appearing to be evenly blended
heterogeneous mixture two or more substances not chemically combined, and appearing non-uniform with physically distinct substances included
condensation point temperature at which gas turns to a liquid
conductor a material that does allow electricity or heat to pass through easily
density an object's mass compared to its volume. mass divided by volume is density
deposition a gas changing into a solid without changing into a liquid
ductile able to be pulled into long, thin wires
flexible able to bend without breaking
freezing point temperature in which a liquid turns to a solid
insulator a material that does not allow electricity to heat to pass through easily
luster shininess; the property of something that shines with reflected light
magnetic material that is attracted to magnets
malleable able to be hammered or pressed into flat sheets
melting point temperature at which solid turns to a liquid
Created by: tessa_adams