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35 Cards in this Set
- Front
- Back
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substance with atoms that are all alike
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element
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substance formed from two or more elements in which the exact combination and proportion of elements is always the same
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compound
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mixture that everything is evenly mixed throughout it
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heterogenous mixture
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solid, liquid, or gas that contains two or more substances blended evenly through out
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homogeneous mixture
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explanation of the mass and speed of the object
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kinetic theory
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amount of force exerted per unit area
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pressure
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the smallest particle of an element that still retains the properties of an element
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atom
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standard used for comparison of the test results in an experiment
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control
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in an experiment, a variable that does not change when other variables do
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constant
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factor that can cause a change on the results of an experiment
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variable
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the rate of change of velocity
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acceleration
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includes the speed of an object and the direction of its motion
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velocity
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force that opposes the sliding motion between two touching surfaces
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friction
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attractive force between two objects that depends on the mass of the objects and the distance between them
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gravity
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gravitational force exerted on an object
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weight
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property of a moving object that equals its mass times its velocity
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momentum
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stored energy an object has due to its position
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potential energy
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the speed and direction of a moving object
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viscosity
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atoms of the same element that have different numbers of neutrons
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isotope
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as the velocity of a fluid increases, the pressure exerted by the fluid decreases
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bernoulli's
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pressure applied to a fluid is transmitted throughout the fluid
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pascal's
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if the buoyant force of the fluid is equal to the weight of an object, it'll float
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archimede's
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with constant temperature, the volume of a gas decreases the pressure increases
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boyle's
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with constant pressure, the volume of a gas increases with increasing temperature
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charle's
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which element is always found in nature combined with other elements?
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magnesium
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what are the least reactive elements in the periodic table called?
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noble gases.
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what element is present in all organic compounds?
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carbon
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what is the difference between the independent variable and the dependent variable?
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dependent depends on other variables;
independent depends on person |
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why do projectiles move in a curved path?
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horizontal velocity and vertical acceleration
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give a few examples of forces.
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weight/gravity, friction, weight resistance
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what energy conversion can friction cause?
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mechanical-thermal
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give examples:
1. element 2. compound 3. solution 4. suspension 5. colloid |
1. hydrogen
2. water 3. salt water 4. muddy water 5. smoke |
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how would you separate sand and sugar?
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dissolve in water, filter sand, distallation
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what is a mixture?
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2 or more substances that can be separated easily.
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what is a substance?
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type of matter with a fixed composition
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