| What is a system? | A single object or a group of objects |
| What is a closed system? | Systems where neither matter nor energy can enter or leave. |
| What is energy? | The ability of an object to do work. |
| What happens when work is done by an object? | Energy is transferred from the object |
| What happens when work is done on an object? | Energy is transferred to the object |
| What is the equation for work done? | Work done = Energy transferred |
| What is work done and energy is measured in? | Joules |
| 1KJ = _____ J | 1000J |
| 1 MJ= _______J | 1,000,000J |
| What is kinetic energy? | Energy possessed by a moving object |
| What is chemical energy? | Energy stored in the bond between atoms e.g food, fuel |
| What is thermal energy? | Energy of random motion of the particle in an object. The hotter it is, the more energy it has in this store. |
| What is gravatational potential energy? | The energy an object has due to its position in a gravitational field |
| What is magnetic energy? | The energy an object has due to its position in a magnetic field |
| What is electrostatic energy? | The energy an object has due to its position in an electric field. |
| What is elastic potential energy? | The energy stored in an object when its shape has changed |
| What is nuclear energy? | The energy stored between the particles in the nuclei of atoms (is only released in fission or fusion reactions) |
| What happen when a ball is thrown vertically upwards? | Energy is transferred from kinetic energy to gravitational energy |
| True/ false - the total amount of enrgy possessed by a ball is constant after it is thrown upwards | True |
| What happens when a ball is horizontally kicked? | Energy is transferred from chemical to kinetic energy store |
| What happens when a kettle is heated up? | Energy is transferred from electrostatic energy to thermal energy of the kettle's heating element store electrically as a system |
| What happens when a driver brakes on his car to rest with no acceleration after he rest. | Energy is transferred from kinetic to thermal energy store. |
| What happens when a jack in a box pops up? | Energy is transferred mechanically as a system from elastic energy store of the compressed spring to the kinetic energy store and gravitational potential. |
| What is the energy when two north poles are near each other? | There is transfer of energy from magnetic energy to kinetic energy store |
| What happens when wood is burnt? | Energy is transferred by heating from chemical to thermal energy store. |
| What happens when you power a filament bulb with a lamp? | Energy is transferred from chemical energy store to thermal energy store and emits visible light. |
| What is the energy equation for gravitational potential energy? | Ep=mgh |
| What is the energy equation for kinetic energy? | Ek= 1/2 mv2 |
| What is the energy equation for elastic potential energy? | Ee=1 /2 ke2 |
| What is the specific heat capacity? | The amount of energy it takes to increase the temperature of1kg of that material by 1C. |
| What is the equation for specific heat capacity? | ΔE = mcΔθ |
| What is sound energy? | The movement of energy through a substance like air or water caused by vibration. |
