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Physical Sci Midterm

9th grade Physical Sci. Midterm voc.

QuestionAnswer
is a statement about what happens in nature and that seems to be true all the time. Scientific Law
an organized way of gathering and analyzing evidence. Scientific Method
occurs when the scientist’s expectations change how the results are (reviewed) analyzed or the conclusions are made. Bias
is a visual display of information or data. Graph
its value changes according to the changes in the other variables. Dependent Variable
the variable changed to see how it will affect the dependent variable. Independent Variable
is an explanation of things or events based on knowledge gained from many observations and investigations. Theory
a possible explanation for a problem using what you know and what you observe. Hypothesis
is the distance an object travels per unit of time. Speed
speed at a giving point in time. Instantaneous Speed
includes the speed of an object and the direction of its motion. Velocity
is the rate of change of velocity. Acceleration
acceleration toward the center of a curved or circular path. Centripetal Acceleration
of an object is the product of its mass and velocity. Momentum
is a push or a pull. Force
is the tendency of an object to resist any change in its motion. Inertia
is the force that opposes the sliding motion of two surfaces that are touching each other. Friction
states an object’s acceleration is in the same direction as the net force on the object and is equal to the net force exerted on it divided by its mass. Newton's Second law of motion
states that when one object exerts a force on a second object, the second object exerts force on the first that is equal in strength and opposite in direction. Newton's third law of motion
the gravitational force exerted on an object. Weight
is energy that is stored due to the interactions between objects. Potential Energy
is energy that is stored by compressing or stretching an object. Elastic Potential Energy
is energy due to motion. Kinectic Energy
is energy that is due to the gravitational forces between objects. Gravitational Potential Energy
total amount of energy due to position and the energy in the form of motion. Mechanical Energy
is force applied through a distance. Work
is the rate at which energy is converted. Power
is a device that changes the force or increases the motion from work. Machine
is the ratio of the output force to input force. Mechanical Advantage
of an object is the sum of the kinetic energy and the potential energy of all of the particles that make up that object. Thermal Energy
is the transfer of thermal energy in a fluid by the movements of warmer and cooler fluid. Convection
is a material through which thermal energy moves slowly. Thermal Insultator
is the transfer of energy by electromagnetic waves. Radiation
is the transfer of thermal energy by collisions between the particles that make up matter. Conduction
is a device that converts some thermal energy into mechanical energy. Heat Engine
is a device that transforms radiant energy from the sun into thermal energy. Solar Collector
is a closed path that electric current follows Electric Circuit
is the accumulation of excess electric charge on an object. Static Electricity
states that share can be transferred from object to object, but it cannot be created or destroyed. Law of Conservation of Charge
is an electrical circuit with only one branch. Series Circuit
the current in a circuit equals the voltage difference divided by the resistance. Ohm’s Law
is a material through which electrons move easily. Conductor
contain two or more branches for current. Parallel Circuits
is a device that increases or decreases the voltage of an alternating current. Transformer
is electric current that is always in one direction through a wire. Direct Current
is electric current that reverses the direction in a regular pattern. Alternate Current
is a device that changes electrical energy into mechanical energy. Electric Motor
is a temporary magnet created when there is a current in a wire coil. Electromagnet
is a large wheel that rotates when pushed by water, wind, or steam. Turbine
the regions of a magnet that exerts the strongest force. Magnetic Poles
Created by: P.V.A.
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