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Ps semester 1 test l
| Question | Answer |
|---|---|
| factor thatr changes as a resulrt of changes in other variables | dependent variable |
| factor that as it changes affects the messure of another variable | independent variable |
| in a experiment a variabgle that does not change when 0other variables change | constant |
| standard used for a comparison of test results in an experiment. | control |
| explanation of things or events that is based on nowledge gained from nmany observation ande investigations | theory |
| statment about what happens in natur that seems to be true all the time. | scientific law |
| rate of change of veolcity cabn be cavulated by dibiding the change in the velocity bby the time it takes the change to occur | acceleration |
| a push or pull exerted on an object. | force |
| resistance of an object to a change in its motion. | inertia |
| the speed and direction of a moving object. | velocity |
| distance an object travels per unit of time. | speed |
| newton's 1st law of motion | |
| states that the acceleration of an object is in the same direction as the net force on the object,and that the acceleration equals the net force divided by the mass | newtons 2ed law of motion |
| states that when one object expertise a force on a second object the second object exerts a force. | newtons 3rd law of motion |
| force that opposes the sliding motion between two touching surfaces. | friction |
| energy a moving object has because of it motion. | kinetic energy |
| stored energy. | potential energy |
| states that the mass of all substance present before a chemical change equals the mass of all the subsistence. | law of conserbation of mass |
| sum of the potential energy and a system. | mechanical energy |
| machine that does work with only multipurpose | simple machie |
| consists of two or more simple machines put together. | compound machine |
| general describes the extent to which time, effort or cost is well used for the intended task or purpose. | efficiency |
| a measure of the force amplification achieved by using a tool, mechanical device or machine system. | mechanical advantage |
| the transfer of heat energy by microscopic diffusion and collisions of particles or quasi-particles within a body | conduction |
| concerted, collective movement of ensembles of molecules within fluids (e.g., liquids, gases) and rheids. | convection |
| a process in which energetic particles or energetic waves travel through vacuum, or through matter-containing media | radiation |
| energy transferred from one body to another by thermal interactions. | heat |
| a substance that resists electric current; Insulator (genetics), an element in the genetic code | insulator |
| a conductor is an object which permits the flow of electric charges in one or more directions. | conductor |
| a physical property of matter that quantitatively expresses the common notions of hot and cold. | temperature |
| refers to the longest dimension of an object. In certain contexts, the term "length" | length |
| a quantitative measure of an object's resistance to ... | mass |
| the quantity of three-dimensional space enclosed by some closed boundary, for example, the space that a substance (solid, liquid, gas, or plasma) | volume |
| The mass density or density of a material is its mass per unit volume. The symbol most often used for density | density |
| force is said to do work when it acts on a body so that there is a displacement of the point of application, however small, in the direction of the force. | work |
| an indirectly observed quantity that is often understood as the ability of a physical | energy |
| any influence that causes an object to undergo a certain change, either concerning its movement, direction, or geometrical construction. | force |
| speed | |
| acceleration | |
| time | |
| temperature |
Created by:
gloverjoseph
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