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TuesdayScienceTest
the study gide for my science test on tuesday, november 10
| Question | Answer |
|---|---|
| What is the definition of energy? | to move an object |
| what is potential energy? | when something has the potental to move when energy is there but no being used |
| what is kinetic energy? | when something is in movement and using energy |
| Give an example of kinetic and potential energy | kinetic: when a ball is thrown Potential: when a ball is held in your hand |
| what are 5 types of energy? | gravitational thermal electromagnetic mechanical chemical |
| energy can change forms but not me lost give an example. | automobile fuel = chemical -> mechanical done through heat oil = chemical -> thermal, nuclear |
| what is a conductor? | something that allows electricity to flow through it |
| what is the opposite of a conductor or something that does not let electricity flow though it? | insulator |
| who was Alessandro Volta? | he came up with the first battery using zinc and silver. |
| what is the flow of electricity called | and electric current |
| What is AC? | AC stands for alternating current. when electrons move back and fourth at a fast pace. |
| what is DC? | stands for direct current. when electrons only travel in one direction. |
| What is a series circuit? | when only one path is available for the electricity to travel |
| what is a parallel circuit? | when more than one path is available for the electricity to travel. |
| why do you get shocked if you stick your finger in an electric socket? | because there is an electric current and you are a conductor. |
| what is a complex circuit? | something made up of series and parallel circuits. |
| what is a switch? | a device to break a circuit |
| what is a volt? | a unit for measuring the rate of electron flow in a circuit |
| electric charge | having too many or too few electrons |
| battery | a temporary source of electricity |
| power | the rate at which a device converts electrical energy to another form of energy |
| circut | the path of electric conductors |
| static electricity | electric charge built up in one place |
| electroscope | device that detects electric charges |
| resistance | opposition to the flow of electricity |
| ampere | unit to measure electric potential |
| what are the three main parts of an atom? | protons neutrons electrons |
| what is electricity? | the flow of electrons from one atom to another |
| what is a circuit? | the path of electricity in a circle opened by a switch |
| what happens to molecules as heat is added and taken away? | when they are heated up the move faster and when they are cooled down they slow down. |
| what are the two main properties of magnets? | what its attracting has to contain iron always point north and south |
| paramagnetic | things we don't think about being attracted by magnets |
| ferromagnetic | things that we know are attracted by magnets |
| diamagnetic | repelled by magnets |
| what is a switch? | can stop the flow of energy from a source to a load/resistance |
| what type of current does a battery represent | DC->current that only flows in one direction |
| can you demagnetize a magnet? | yes if you throw in on the ground hard enough heat it up |
| what is the name of the area around a magnet? | magnetic field |
| how did the magnet get its named | a Greek city named magnesia named magnetite after city |
| what are the degrees of magnetism | diamagnetc paramagnetic ferromagnetic |
| what happens when you break a magnet? | you get two smaller magnets? |
| what is the measure of heat? | temperature |
| what are the three temperature scales | Kelvin Fahrenheit Celsius |
| what is electricity | the flow and movement of electrons |
| absolute zero | as nothing colder on kelvin scale |
| absolute zero -> in Celsius and Fahrenheit | -273 C -513 F |
| what two parts of an atom are in the nucleus? | protons and neutrons electrons on outside |
| what is the charge of each of the parts of an atom | protons - + positive neutrons - +- neutral electrons - -negative |
| Opposites attract in magnets | poles attract N-S |
| opposites in electricity | electrons and protons stick together to cancel each other out |
| study pictures of iron shavings on magnet patterns | SS--> there is a circle of no iorn shavings where the S and S side are together ONE--> There is lines in a circle around the center showing the magnetic force field NS--> there is a big cluster of iorn shavings where the N and S side are facing eachothe |
| three methods of heat transfers | conduction radiation convection |
| conduction | movement of heat through a solid |
| convection | movement of heat through a liquid and a gas |
| radiation | heat waves from the sun or solar energy |
| Freezing point | When something turns into a solid |
| boiling point | when something turns into a gas |
| condensing point | opposite of a boiling point |
| melting point | opposite of a freezing point |
| magnetic force | a push or pull exerted by a magnet |
| how are atoms of ferromagnetic substances different from the atoms of other substances? | their atoms choose domains (North + South) and organize in alternating groups |
| what is heat? | energy created by movement of molecules |
| what are the freezing and heating points of Fahrenheit? | freezing - 32 degrees boiling - 212 |
| what are the freezing and boiling points of Celsius | Freezing - 0 degrees Boiling - 100 Degrees |
| what are the freezing and boiling points of Kelvin? | Boiling - 373 degrees Freezing - 273 degrees |
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IntoTheShadows
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