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35 Cards in this Set
- Front
- Back
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the capacity to do work
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energy
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a ________ change affects only the physical properties of matter
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physical
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a ______ change occurs whenever a new substance is made
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chemical
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the change of a substance from a liquid to a gas
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evaporation
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describes a process in which heat is absorbed from the environment
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endothermic
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any change in matter where energy (heat) is released
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exothermic
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the ____________________ states that energy cannot be created or destroyed but can be changed from one form to another
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law of conservation of energy
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consists of the matter inside a process
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system
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consists of everything outside the system
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surroundings
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light energy is transferred from the sun to plants
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photosynthesis
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energy exists in different forms such as: chemical, mechanical, _____, heat, ________, and sound.
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light, electrical
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energy transferred between objects that are different temperatures
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heat
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the energy of an object that is due to the objects motion
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kinetic energy
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a measurement of the average kinetic energy of the particles in an object
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temperature
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SI unit for temperature
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the Kelvin, K
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zero point on the Kelvin scale is designated as ________
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absolute zero
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the quantity of heat required to raise a unit mass of homogeneous material 1 K in a specified way given constant pressure and volume
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specific heat
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a series of steps followed to solve a problem
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the scientific method
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a theory or explanation that is based on observations and that can be tested
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hypothesis
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the variable kept constant
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control
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the procedure by which a variable is kept constant
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a controlled experiment
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an explanation for some phenomenon that is based on observation, experimentation, and reasoning
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theory
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a summary of many experimental results and observations; tells how things work
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law
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the law that states that mass cannot be created or destroyed in ordinary chemical and physical changes
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law of conservation of mass
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a hypothesis _______ an event
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predicts
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a theory ______ an event
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explains
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a law _______ an event
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describes
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a _____ represents an object, a system, a process, or an idea
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model
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a description of how close a measurement is to the true value
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accuracy
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the exactness of a measurement
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precision
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a prescribed decimal place that determines the amount of rounding off to be done based on the precision of the measurement
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significant figures
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density = _______/volume
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mass
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a ___________ is determined by counting, not by measuring
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count value
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in the equation:
Q = m*c*∆T Q is the heat, m is the mass, c is the specific heat and ∆T is the variation of __________ |
temperature
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very large and very small numbers can be written in _______
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scientific notation
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