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Sci Nov 24 2025
| Question | Answer |
|---|---|
| Energy | The ability to do work or cause change; it comes in many forms Ex: light, sound, electricity |
| Law of Conservation of Energy | Energy can neither be created nor destroyed – it can only be transferred from one type to another!!! |
| Motion | When an object's position changes relative to another object *It takes energy for motion to occur |
| Force | a push or a pull on an object |
| Unit for force | Newtons (N) |
| Work | any time you exert a force (a push or pull) on an object that causes the object to move IN THE SAME DIRECTION as the force |
| Work requires | motion or movement – if an object doesn’t move, no matter how hard you are pushing or pulling, it’s not work |
| movement is not work when | the object is moving, but not in the same direction as the force |
| Calculating Work | W = F x d |
| The units for Work | Joules (J). |
| Power | The rate at which work is done |
| Calculating Power | P = W➗t |
| The units for Power | watts (W). |
| Kinetic Energy | the energy that an object possess by being in motion |
| Calculating Kinetic Energy | Kinetic energy = 1/2 x mass x Speed² |
| Speed | the more speed an object has, the more kinetic energy |
| Mass | the more mass an object has, the more kinetic energy |
| Potential Energy | energy that results from position or shape of an object. It has the POTENTIAL to change into kinetic energy. |
| Gravitational Potential Energy - | related to an object’s vertical position, or height above the ground |
| Elastic Potential Energy - | associated with objects that can be compressed or stretched |
| Energy transformation | occurs when one form of energy changes into another |
| Energy transfer | takes place when energy moves from one object to another |
| conservation of energy | Energy must be conserved since we can’t create more of it or destroy any of it. This means that it must be transferred. It can change forms from one type of energy to another. |
| Nonrenewable resources | Cannot be replaced after they are used or can be replaced only over thousands or millions of years |
| Fossil Fuels | Fossil fuels are formed from ancient plants and animals that lived millions of years ago |
| Nuclear Energy | Nuclear energy is created when tiny particles inside an atom are split apart in a process called nuclear fission. This releases a lot of energy that we can use to generate electricity. Nuclear energy is also considered non-renewable |
| Wind Energy | Winds turns a turbine which converts mechanical energy→ electrical energy |
| Hydro power | Falling water turns a turbine (connected to a generator) which converts mechanical energy → electrical energy (hydroelectricity) |
| Geothermal Energy | Thermal energy resulting from the heating of the earth’s crust. Water can be pumped underground to return as steam and turn a turbine to produce electrical energy |
| Biomass | Organic matter such as plants, wood, waste, can be burned and used to create steam to turn a turbine and produce electricity |
Created by:
30patels