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74 Cards in this Set
- Front
- Back
the first step in the scientific method which is using your senses to gather information
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observation
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a rule of nature that sums up related observations and experimental results to describe a pattern in nature
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scientific law
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the practical use of scientific information
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technology
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factor whose value depends upon the value of the independent variable
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dependent variable
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the factor adjusted by the experimenter
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independent variable
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the interval between two events
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time
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the amount of space occupied by an object
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volume
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the SI unit for temperature; zero K=absolute zero(the coldest possible temperature -276ºC)
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kelvin
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the mass per unit volume of a material
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density
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a measurement of the matter in an object
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mass
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tenth
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deci
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hundreth
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centi
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describes both speed and direction of an object
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velocity
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a push or a pull one body exerts on another
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force
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the rate of change in position, or “rate of motion”
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speed
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the tendency of an object to resist any change in its motion
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inertia
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the rate of motion at any given instant
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instantaneous speed
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the greatest velocity reached by a falling object. Terminal velocity is best achieved when the force of gravity is balanced by air resistance
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terminal velocity
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human-made devices that orbit Earth for a specific purpose
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artificial satellite
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occurs when waste heat significantly changes the temperature of the environment
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thermal pollution
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energy in the form of motion
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kinetic energy
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stored energy
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potential energy
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the total amount of kinetic and potential energy in a system
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mechanical energy
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the first artificial satellite launched in 1957 by the Soviet Union
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Sputnik
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the study of matter and energy
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physical science
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a testable prediction
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hypothesis
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a factor that doesn’t vary in an experiment
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constant
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study of science for the sole purpose of advancing our knowledge
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pure science
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process that uses certain skills to solve a problem
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critical thinking
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in measurement, an exact quantity that everyone agrees to use as a basis of comparison; for example, a centimeter, meter, kilogram, cubic decimeter, liter, Kelvin, joule and so on
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standard
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a visual display of information or data
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graph
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the SI unit for time
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second
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used to measure small mass
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gram
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the SI basic unit of length (m) 100 cm=1 m
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meter
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of 100
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hecto
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of one-millionth
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milli
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the force that opposes motion between two surfaces that is touching each other
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friction
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the measure of the force of gravity on an object
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weight
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the total distance traveled divided by the total time of travel
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average speed
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a speed that does not vary
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constant speed
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forces on an object that are equal in size and opposite in direction
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balanced forces
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the force air exerts on a moving object
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air resistance
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anything that is thrown or shot in the air
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projectile
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is the unit scientists use to measure the amount of energy contained in different foods
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calorie
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the total energy of the particles in a material
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thermal energy
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the amount of energy it takes to raise the temperature of 1 kilogram per Kelvin
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specific heat
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the measure of the average kinetic energy of the particles in a sample of matter
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temperature
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an explanation based on many observations
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theory
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a symbolic representation of an idea, system, or structure to make something understandable; they can help us solve problems and deal with things difficult to see because they are too large or too small
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model
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a standard for comparison
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control
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an organized procedure for testing a hypothesis
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experiment
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British scientist that the joule was named after
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James Joule
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is used to show how some fixed quantity is broken down into parts
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circle graph
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used to show trends or how the data change over time
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line graph
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is useful for comparing information collected by counting
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bar graph
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occupies the same volume as a cubic decimeter (dm³)
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liter
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units obtained by combining SI units
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derived unit
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of 1000
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kilo
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of 10
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deca
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every object in the universe exerts a force on every other object. This is gravity
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gravity
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the sum of the forces on an object when unbalanced forces are applied to it; it changes the object’s speed, direction, or both
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net force
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created the three laws of motion
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Issac Newton
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the rate of change in velocity
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acceleration
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created the pendulum
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Jean Foucault
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acceleration toward the center of a curved or circular path
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centripetal acceleration
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the force acting toward a center of a curved or circular path
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centripetal force
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a property a moving object has because of its mass and velocity
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momentum
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thermal energy that flows from something with a higher temperature to something with a lower temperature
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heat
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transfer of energy through motion
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work
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ability to cause change
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energy
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states that energy may change form but it cannot be created or destroyed under ordinary conditions
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law of conservation of energy
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what are the seven types of energy?
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1. mechanical
2. electrical 3. nuclear 4. chemical 5. heat/thermal 6. radiant/light 7. sound |
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what are the five steps of the scientific method?
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1. Determine the problem (What do you want to find out?)
2. Make a hypothesis. (What prediction do you want to test?) 3. Test your hypothesis. (What steps can you take to reach a conclusion about your hypothesis? What measurements should you record?) 4. Analyze the results. (What happens during your experiment?) 5. Draw conclusions. (Do your observations and data suggest that your hypothesis is supported? If not, do you think your hypothesis should be changed, or do experimental procedures need adjustment?) |
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what are Newton's three laws of motion?
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1. An object moving at a constant velocity keeps moving at that velocity unless a net force acts on it
2. A net force acting on an object causes that object to accelerate in the direction of the force 3. The action-reaction law; “to every action force there is an equal and opposite reaction force” |