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semester 1 review kg
Test 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 variable | Independent Variable |
| in a 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 not explain why or how something happens | Scientific Law |
| rate of change of elocity; can be calculated by dividing the change in the velocity by the time it takes the change to coocr | 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 nit of time | Speed |
| states that an object moving at a constant velocity keeps moving at that velocity | Newton’s 1st Law of Motion |
| states that the acceleration of an object is in the same direction as the net forcre on the object, and that the acceleration equals the net force divided by the mass | Newton’s 2nd Law of Motion |
| states that when one object exerts a force on a second object; the second object exerts a force on the first object that is equal in strength and in the opposite direction | Newton’s 3rd Law of Motion |
| force that opposes the sliding motion between two touching surfaces | Friction |
| energy a moving object has beecause of its motion; depends on the mass and speed of the object | Kinetic Energy |
| stored and energy an object has due to its position | Potential Energy |
| states the energy can never be created or destroyed | Law of Conservation of Energy |
| sum of the potential energy and kinetic energy in a system | Mechanical Energy |
| machine that does work with only one movement | Simple Machine |
| machine that is a combination of two or more simple machines | Compound Machine |
| ratio of the ouput work done by the machine to the input work done on the machine expressed as a percentage | Efficiency |
| transfer thermal energy by collisions between particles in matter at a higher temp. and particles in matter at a lower temp. | 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 are not able to move easily | Insulator |
| material , such as cooper wire in which electrons can move easily | Conductor |
| measure of the average kinetic energy of all the particles in a n object | Temperature |
| m- meter | Length |
| kg kilogram | Mass |
| cm3 centimeters squared | Volume |
| mass per unit volume of material | Density |
| Joules | Work |
| Joules | Energy |
| newton | Force |
| m/s | Speed |
| m/s2 | Acceleration |
| second-s | Time |
| K- Kelvin | Temperature |
| 1. state the problem 2.gather information 3.form a hypothesis 4.test eh hypothesis 5.analyze data 6.draw conclusions | steps of the scientific method |
Created by:
MrBig86
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