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Physical Sci Midterm
9th grade Physical Sci. Midterm voc.
| Question | Answer |
|---|---|
| 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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