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science review
review
| Question | Answer |
|---|---|
| factor that changes as a result of changes in the other variables | Dependent variable |
| factor that,as it changes,affects the measure of another variables | Independent variable |
| in an experiment,a variable that does not change when other variables change | constant |
| standard used for comparison of test results in an experiment. | control |
| explanation of things or events that is based on knowledge gained from many observations and investigations. | theory |
| statement about what happens in nature that seems to be true all the time;does no explain why or how something happens. | scientific law |
| rate of change of velocity;can be calculated by dividing the change in the velocity by time it takes the change to occur. | acceleration |
| a push or a pull exerted on an object | force |
| resistance of an object to a change color in acids and bases | inertia |
| the spee and direction of a moving object | velocity |
| distance an object travels per unit of time | speed |
| first law of motion: a body remains at rest or in motion with a constant velocity unless acted upon by an external force. | Newtons first law of motion |
| states that the acceleration of an object is in the same diretion as the net force on the object,and that the acceleration equals the net force divided by the mass. | Newtons second law of motion |
| states that when one object exerts a force on a second object,the second object exerts a force on the object,and that the acceleration equals the net force divided by the mass. | Newtons third law of motion |
| force that opposes the sliding motion between two touching surfaces. | friction |
| energy a moving object has because of its motion;depends on the mass and speed of the object. | Kinetic energy |
| stored energy an object has due to its position. | potential energy |
| states that energy can never be created or destroyed. | Law of conversation of energy |
| sum of the potential energy and kinetic energy in a system. | Mechanical energy |
| machine that does work with only one movement-lever,pulley,wheel and axles, inclined plane,screw,and wedge. | simple Machine |
| machine that is a combination of two or maore simplle machines | compound Machine |
| ratio of the output work done by the machine to the input work done on the machine,expressed as a percentage. | Efficiency |
| ratio of the output force exerted by a machine to the input force applied to the machine. | Mechanical advantage |
| transfer of thermal enery by collisions between particles in matter at a higher temperature and particles in matter at lower temperature. | conduction |
| transfer of thermal energy in a fluid by the movement of warmer and cooler fluid from one place to another. | convection |
| transfer of thermal energy by electromagnetic waves. | radiation |
| thermal energy that flows from a warmer material to a cooler material. | heat |
| material in which electrons ar not able to move easily | insulator |
| material,such as copper wire, in which electrons can move easily. | conductor |
| measure of the average kinetic energy of all the particles in an object. | Tempretaure |
| meter | length |
| gram | mass |
| cubic centimeter | volume |
| grams per cubic centimeter | dencity |
| joule | work |
| joule | energy |
| newton | force |
| meters per second | speed |
| meters per second square | Acceleration |
| seconds | time |
| Kelvin | tempreature |
Created by:
oscargonzalez
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