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science the investigation and exploration of natural events and of the new information that results from those investigations.
observation using one or more of your senses to gather information and take note of what occurs.
inference is a logical explanation of an observation that is drawn from prior knowledge or experiences.
hypothesis possible explanation about an observation that can be tested by scientific investigations.
predictions a statement of what will happen next in a sequence of events.
technology practical use of scientific knowledge, especially for industrial or commercial use.
scientific theory an explanation of observation or events based on knowledge gained from many observations
scientific law describes a pattern or a event in nature that is always true.
critical thinking comparing what you already know with the information you are given in order to decide whether you agree with it
description a spoken or written summery of observations
explanation an interpretation of observations
accuracy a description of how close a measurement is to an accepted or true value
precision a description of how similar or close measurements are to each other
significant digits are the number of digits in a measurement that are known with a certain degree of reliability
international system of units (si) an internationally accepted system for measurements
energy the ability to cause change
potential energy stored energy due to the interaction between objects or particles
chemical energy the energy stored in and released from the bonds between atoms
nuclear energy energy stored in and released from the nucleus of an atom
kinetic energy energy due to motion
electric energy energy in an electric current
mechanical energy sum of the potential energy and the kinetic energy in a system
thermal energy sum of the kinetic energy and the potential energy of the particles that make up the object
wave disturbance that transfers energy from one place to another without transferring matter
sound energy is energy carried by sound waves
radiant energy energy carried by electromagnetic waves
law of conservation of energy says that energy can be transformed from one form to another, but it cannot be created or destroyed
energy transfer energy moves from one object to another without changing form
energy transformation one for of energy is converted to another form of energy
work the transfer of energy that occurs when a force makes an object move in the direction of the force
open system a system that exchanges matter or energy with the environment
closed system a system that dose not exchange matter or energy with the environment
renewable energy resource an energy resource that is replaced as fast as, or faster than, it is used
nonrenewable energy resources an energy resource that is available in limited amounts or that is used faster than it can be replaced in nature
temperature measure of the average kinetic energy of the particles in a material
heat movement of thermal energy from a region of higher temperature to a region of lower temperature
conduction transfer of thermal energy by collisions between particles in matter
radiation the transfer of thermal energy by electromagnetic waves
convection transfer of thermal energy by the movement of the particles from one part of a material to another
vaporization change of state from a liquid to a gas
thermal conductor material in which thermal energy moves quickly
thermal insulator a material in which thermal energy moves slowly
motion the process of changing position
reference point starting point you use to describe the motion or the position of an object
distance the total length of your path
displacement the distance between your initial, or starting, position and your final position
velocity the speed and direction of an object's motion
acceleration the measure of the change in velocity during a period of time
force push or pull on an object
contract force a push or a pull applied by one object to another object that is touching it
noncontact force a force that pushes or pulls an object without touching it
friction contact force that resists the sliding motion between two objects that are touching
gravity noncontact attractive force that exists between all objects that have mass
balanced forces when the net force on an object 0 N
unbalanced force when the net force acting on an object is not 0
inertia the tendency of an object to resist a change in motion
Newtons first law states that if the net force acting on an object is 0, the motion of the object dose not change
Newtons second law the acceleration of an object is equal to the net force applied to the object divided by the objects mass
Newtons third law when one object exerts a force on a second object, the second object exerts a force of the same size
force pair when two objects exert forces an each other
work the transfer of energy to an abject by a force that makes an object move in the direction of the force
power the rate at which work is done
mechanical wave wave that travels only though matter
electromagnetic wave wave that can travel through empty space or through matter
transverse wave wave in which the disturbance is perpendicular to the direction the wave travels
longitudinal wave wave that makes the particles of a medium move back and forth parallel to the direction the wave travels
frequency the number of wavelengths that pass a point each second
amplitude the maximum distance a wave varies form its res point
refraction change in direction of a wave as it changes speed, moving from one medium into another
compression the region of a longitudinal wave there the particles of the medium are closer together.
rarefaction the region of a longitudinal wave where the particles are farthest apart
pitch perception of how high of low a sound seems
dicibel unit used to measure sound intensity, or loudness
Created by: patedor8182