Science Fall Exam
About this set
Created by:
mtbourdeaux on December 15, 2011
Log in to favorite or report as inappropriate.
Order by
69 terms
Terms | Definitions |
|---|---|
 3 steps of energy conversion | 1. sort trash 2. create stock by breaking it down 3. Heats up trash without burning it |
| energy | The ability to do work |
| Law of Conservation of energy | -Energy can neither be created nor destroyed -It is transferred |
| Kinetic energy | The energy of motion |
| Potential Energy | Stored energy (not moving) |
| unit for energy | Joules |
| KE formula | KE=1/2mv^2 Mass, velocity |
| PE formula | PE=mgh Mass, gravity(9.8), height |
| Mechanical formula | KE+PE |
| Chemical Energy | Energy of moleculer bonds |
| Thermal Energy | Heat energy |
| Nuclear Energy | Energy of an atom being slit or fused |
| Mechanical Energy | Energy stored in an object so it can do work |
| Electrical | Energy of moving electrons |
| Radiant | Light energy |
| non renewable resource | a resource that cannot be replaced in your lifetime |
| examples of nonrenewable | coal oil natural gas uranium |
| renewable resource | a resource that can be replaced |
| examples of renewable resources | wind sun/ solar energy biomass energy hydrogen fuel cells hydroelectric energy geothermal energy |
| biomass energy | chemical energy stored in living things renewable |
| geothermal energy | thermal energy beneath the earths surface |
| pro and con of geothermal energy | pro: causes no pollution con: not widely available |
| fusion | likely to produce little pollution or radioactive waste |
| hydrogen fuel cells | generate hydrogen by reacting hydrogen with oxygen (produces water) renewable |
| solar energy | sunlight converted into usable energy depends on climate |
| hydroelectric power | energy obtained by flowing water |
| pros of hydroelectric energy | causes no pollution cheap |
| cons of hydroelectric energy | dams cause environmental issues many of the best places for dams in the US are already being used :( |
| energy can be conserved by: | reducing needs for energy increasing efficiency of energy use **Finding ways to do these two things is energy conservation** |
| Difference Between Energy and Work | ENERGY IS WORK! |
| Leading Zeros | Significant |
| Significant | Trailing zeros with decimal |
| Not significant | Trailing Zeros without decimals |
| Significant | Whole numbers (1-9) |
| Significant | 0's in the middle |
| Least decimal Place | Rounding for adding and Subtraction |
| Least Sig Fig | Rounding for Multiplication and Division |
| Frame of Reference | Objects that are not moving that you can compare with a moving object |
| Distance | Length Between two points |
| Scalar | Amount number with no direction (distance) |
| Displacement | Distance away from starting point |
| vector | A quantity that has a magnitude (amount) and direction |
| Speed | A change in a position overtime (no direction) |
| D/T | Speed Formula |
| Velocity | A change in position over time including direction (vector) |
| D/T + Direction | Velocity Formula |
| m/s | Unit for speed |
| m/s +Direction | Unit for velocity |
| Acceleration | Change in velocity over time |
| Acceleration examples | Speed up, Slow Down, Turn |
| Equation Acceleration (1) | Final v - Initial ------------- Change in time |
| m/s^2 | Unit for acceleration |
| Force | A push or pull on an object |
| newtons | what force is measured in |
| 1 newton | 1kg*m/s^2 |
| Friction | a force opposing the motion of two objects that are touching |
| Rolling, Sliding, Static | 3 types of friction from weakest to strongest |
| Net force | The sum of all of the forces action on an object |
| Terminal Velocity | When air resistance = gravity |
| V=9.8*t | Terminal Velocity Equation |
| 1st law | An object in motion stays in motion (law of inertia) |
| Inertia | Tendency of an object to remain doing what its doing |
| 2nd Law | F=ma |
| 3rd Law | For every action there is an equal an opposite reaction |
| P=mv | Equation for momentum |
| w=m*g | Weight Equation |
| kg*m/s | Unit for momentum |
| F=ma | Force Equation |
| Carson | The most amzing erson in the world |
First Time Here?
Welcome to Quizlet, a fun, free place to study. Try these flashcards, find others to study, or make your own.