3287334
Description
Flashcards by Nina Alston, updated more than 1 year ago
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Created by Nina Alston
over 9 years ago
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| Question | Answer |
| Absolute Zero | The lowest possible temperature, -273 |
| Conduction | a method of heat transfer in which heat is passed by vibration of particles |
| Conductor | A substance that allows heat to flow through it |
| Convection | Transfer of heat in a liquid or gas due to less dense, warmer matter rising and denser, cooler matter falling |
| Insulator | A material that does not conduct heat |
| Radiation | Movement of heat in the form of electromagnetic waves which can travel through a vacuum |
| Temperature | a measure of the average kinetic energy of particles in a substance that results in how hot or cold the substance is |
| Thermometer | an instrument used to measure temperature |
| Compression | A region of high pressure where particles are close together |
| Decibel (dB) | Unit used to measure loudness |
| Echo | A sound that is reflected and heard a second time |
| Frequency | the number of waves passing a point every second |
| Hertz (Hz) | The unit used to measure frequency |
| Infrasound | The sounds produced by waves of vert low frequency, less that 20 Hz |
| Longitudinal Wave | A wave in which the vibration is in the same direction that the wave is traveling |
| Rarefaction | A region of low pressure, in which particles are far apart |
| Sound Wave | Regions og high and low pressure originating from a vibrating object and transmitted through a medium |
| Tinnitus | Constant ringing in the ears caused by prolonged exposure to loud sounds |
| Transverse Wave | A wave in which the vibration is at right angles to the direction of the wave is travelling |
| Wave Length | The distance from one peak of a wave to the next |
| Ultrasound | The sounds produced by waves of greater frequency than humans can hear (Greater than 20,000 Hz) |
| Angle of Incidence, (i) | the angle an incoming ray makes with the normal |
| Angle of Reflection (r) | the angle of a reflected ray makes with the normal |
| Angle of Refraction (r) | the angle a refracted ray makes with the normal |
| Critical Angle | The angle of incidence of light that produces an angle of refraction of 90 degrees |
| Diffuse Reflection | Reflection of light in many directions from an uneven surface such as a book or a backpack |
| Incident Ray | Incoming Ray |
| Lateral Inversion | The sideways or left-to-right reversal of an image in a plane mirror |
| Law of Reflection | The law stating that light is reflected at the same angle that it is incident, or i=r |
| Normal | An imaginary line that is drawn at right angles to a surface that light is incident upon |
| Plane Mirror | A flat mirror |
| Refraction | the bending of light as it enters or leaves different substances |
| Refractive Index | a measure of how easily light travels through a substance |
| Regular Reflection | Reflection of light from a very smooth surface, such as still water or a mirror; it produces a clear image |
| Total Internal Reflection | When light is completely reflected from the boundary of two substances; it occurs when the angle of incidence is greater than the critical angle |
| Virtual Image | A type of image formed in which the rays of light do not actually meet, but only appear to meet at a point inside the mirror |
| List the three processes of heat Transfer | Conduction, Convection and Radiation |
| Name the only process that can transfer heat through the vacuum of space | Radiation |
| State whether sound travels fastest in a solid, a liquid or a gas | Sounds travel faster in a solid as there is more matter for the particles to bounce off. |
| What are the 3 common measurements of temperature | Celcius degrees c, Fahrenheit (oF), kelvin (K) |
| How would heat transfer from one side of the solid to the other? | Particles near the flame vibrate more quickly as they absorb heat energy. These vibrations, from particle to particle, conduct the heat along the solid |
| Name 5 Conductors | silver, Copper, Gold, Aluminum, Magnesium, Tungesten, Nickel, Mercury, PLatinum, Iron |
| Name 5 Insulators | Oil, Fur, Silk, Wool, Rubber, Porcelain, Glass, Plastic, Wood, Paper, Wax, Plastic, Air, Cloth |
| Explain how convection heat works? | as air is heated, its particles gain energy and move further apart. this hot air is less dense than cool air, and so it is pushed upwards by cooler air around it |
| Explain how water heats up by convection | Particles gain heat from the base of the saucepan . cooler liquid sinks down and is then heated, and the cycle continues |
| What happens when radiated heat hits dark colours? | Dark Colours absorb radiated heat |
| what happens when radiated heat hits light colours? | light colours reflect radiated heat |
| what happens when radiated heat hits a clear material? | clear materials, such as glass, transmit radiated heat |
| what are compressions | compressions is when air particles are bunched together |
| what is a rarefaction | regions where air particles are more spread out are called rarefactions |
| what is a sound wave | is the movement of alternating rarefactions and compression |
| What does a Cathode Ray Oscilloscope compare? | a cathode Ray oscilloscope compares sound |
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