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science quiz #2
| Question | Answer |
|---|---|
| what causes electricity | jumping electrons |
| what is the movement of electricity | current |
| what are the two types of current | direct current and alternating current |
| what is alternating current | when the generator switches charges and makes the electrons go back and forth |
| what is direct current | when there is a circuit and the electrons flow from negative to positive |
| what are the two types of electricity | static electricity and normal electricity |
| what makes static electricity special | it stays in one spot and quickly dissipates |
| a circuit with two or more branches for current to flow | parallel circuit |
| material that electrons can move through | conductor |
| flow of electrons through a conductor | electric current |
| made up of a series of parallel circuits | complex circuit |
| device to break a circuit | switch |
| poor conductor of electricity | insulator |
| unit for measuring electric current | volt |
| having to many or to few electrons | electric charge |
| a temporary source of electricity | battery |
| rate at which a device converts electrical energy to another form of energy | power |
| path of electric conductors | circuit |
| device that detects electrical charges | electroscope |
| opposition to the flow of electricity | resistance |
| electric circuit where electric current flows through all parts of the circuit | series circuit |
| unit to measure the electric potential | ampere |
| what are the three parts of the atom | electrons protons and neutrons |
| what is the charge of an electron | negative |
| what is the charge of a proton | positive |
| what is the charge of a neutron | neutral |
| how did magnets get their name | the magnetic rock magnetite was found near the Greek city of magnesia |
| what is another name for a magnet | lodestone |
| what metal do magnets attract well | iron |
| what are the three degrees of magnetic attraction | ferromagnetic, paramagnetic, diamagnetic |
| what is an ferromagnetic | very easily attracted by magnets |
| what is an paramagnetic | slightly attracted by magnets |
| what is diamagnetic | repelled by magnets |
| what is the name for the push or pull of a magnet | magnetic force |
| what is the area around a magnet where its forces can be observed | magnetic field |
| what are the two main properties of magnets | they always point north/south and attracts iron |
| what are the two you can demagnetize a magnet | heat or force |
| who developed the first battery | A. Volta |
| what happens when you break a magnet | you get two smaller magnets |
| what is heat | energy created by the movement of molecules |
| what happens to molecules when heat is added | they move faster and spread out |
| what happens to molecules when heat is taken | they slow down and take up less room |
| what is the movement of heat through a solid | conduction |
| what is the movement of heat through liquids or gasses | convection |
| what is radiation | the movement of heat in waves |
| what is the measure of heat | temperature |
| what are the three scales for measuring the amount of heat | Fahrenheit, Celsius, and Kelvin |
| what is the boiling point for Fahrenheit | 212˚ |
| what is the freezing point for Fahrenheit | 32˚ |
| what is the boiling point for Celsius | 100˚ |
| what is the freezing point for Celsius | 0˚ |
| what is the boiling point for Kelvin | 373˚ |
| what is the freezing point for Kelvin | 273˚ |
| what is absolute zero | when all molecules stop moving |
| what temperature is absolute zero in Celsius | -273˚ |
| what temperature is absolute zero in Fahrenheit | -459˚ |
Created by:
evan787
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