https://padlet.com/olgasoulga/5c4ks4lf8fnk8o08 en-us 2022-05-10 23:51:20 UTC 2022-05-13 15:20:19 UTC hello@padlet.com https://padlet.net/icons/png/1f30a.png olgasoulga https://padlet.com/olgasoulga/5c4ks4lf8fnk8o08/wish/2178445725 A wave is a disturbance/repeating pattern of motion that spreads through space. [Waves are caused by vibration]. Waves transfer energy from place to place. As a wave moves through matter, the particles of the matter move back and forth, but return to their rest position once the wave has passed (no net movement of matter). ]]> 2022-05-10 23:57:36 UTC https://padlet.com/olgasoulga/5c4ks4lf8fnk8o08/wish/2178445725 olgasoulga https://padlet.com/olgasoulga/5c4ks4lf8fnk8o08/wish/2178446966 Waves can travel through different mediums, or materials.]]> 2022-05-10 23:58:49 UTC https://padlet.com/olgasoulga/5c4ks4lf8fnk8o08/wish/2178446966 olgasoulga https://padlet.com/olgasoulga/5c4ks4lf8fnk8o08/wish/2178447672 A wave can be described/measured in terms of wavelength, frequency, and amplitude.

]]> 2022-05-10 23:59:29 UTC https://padlet.com/olgasoulga/5c4ks4lf8fnk8o08/wish/2178447672 olgasoulga https://padlet.com/olgasoulga/5c4ks4lf8fnk8o08/wish/2178453747 -Wave as a model of energy transfer? Wave as a disturbance/pattern of motion? 
-How can we tell an energy story?
-Can we avoid wave speed and v = fλ?
-How will S's square a definition of wave (as motion, disturbance) with the idea of travel through a vacuum? without a disturbance to point to? (Approach A: should we say moving charged particles cause light waves? establish that vibrations cause waves?- this may lead us to discuss infrared waves.. Approach B: should we establish wave-like behaviors for mechanical waves then notice that light also behaves as a wave?)
-Address refraction for sound? Only call out light's straight path or for all waves?

Granular:
-introduce seismic waves?]]> 2022-05-11 00:05:52 UTC https://padlet.com/olgasoulga/5c4ks4lf8fnk8o08/wish/2178453747 olgasoulga https://padlet.com/olgasoulga/5c4ks4lf8fnk8o08/wish/2178460278 Mechanical waves (e.g. sound, water) transfer energy through colliding particles of matter. The energy moves forward, but the particles return to their places. ]]> 2022-05-11 00:12:18 UTC https://padlet.com/olgasoulga/5c4ks4lf8fnk8o08/wish/2178460278 olgasoulga https://padlet.com/olgasoulga/5c4ks4lf8fnk8o08/wish/2178465195 Wavelength and frequency are related (inversely proportional). Higher wavelength = lower frequency. Lower wavelength= higher frequency.]]> 2022-05-11 00:16:55 UTC https://padlet.com/olgasoulga/5c4ks4lf8fnk8o08/wish/2178465195 olgasoulga https://padlet.com/olgasoulga/5c4ks4lf8fnk8o08/wish/2178466971 Light can travel through space, therefore it is not a mechanical wave. ]]> 2022-05-11 00:18:27 UTC https://padlet.com/olgasoulga/5c4ks4lf8fnk8o08/wish/2178466971 olgasoulga https://padlet.com/olgasoulga/5c4ks4lf8fnk8o08/wish/2178476787 An eardrum or analogous part of a technological device (e.g. diaphragm of microphone) absorbs sound waves (energy transfer), which makes the eardrum/part of device vibrate. This generates a signal which can be decoded as sound.]]> 2022-05-11 00:26:32 UTC https://padlet.com/olgasoulga/5c4ks4lf8fnk8o08/wish/2178476787 olgasoulga https://padlet.com/olgasoulga/5c4ks4lf8fnk8o08/wish/2178477376 2022-05-11 00:26:58 UTC https://padlet.com/olgasoulga/5c4ks4lf8fnk8o08/wish/2178477376 olgasoulga https://padlet.com/olgasoulga/5c4ks4lf8fnk8o08/wish/2178478557 The absorption of a wave by an object transfers energy from the wave to the object. ]]> 2022-05-11 00:27:59 UTC https://padlet.com/olgasoulga/5c4ks4lf8fnk8o08/wish/2178478557 olgasoulga https://padlet.com/olgasoulga/5c4ks4lf8fnk8o08/wish/2178479782 When waves reach a boundary between two objects or materials, the waves behave in a combination of waves: they are reflected, transmitted, bent, and absorbed.
(Note: we may want to make light bending its own big idea and exclude sound).]]> 2022-05-11 00:29:00 UTC https://padlet.com/olgasoulga/5c4ks4lf8fnk8o08/wish/2178479782 olgasoulga https://padlet.com/olgasoulga/5c4ks4lf8fnk8o08/wish/2178485112 The material of an object interacting with a wave, affects the behavior of the wave (the amount of light/sound transmitted, reflected, etc.)]]> 2022-05-11 00:33:25 UTC https://padlet.com/olgasoulga/5c4ks4lf8fnk8o08/wish/2178485112 olgasoulga https://padlet.com/olgasoulga/5c4ks4lf8fnk8o08/wish/2178485814 The frequency of a light wave will affect its behavior at the boundary between two objects/materials.]]> 2022-05-11 00:34:02 UTC https://padlet.com/olgasoulga/5c4ks4lf8fnk8o08/wish/2178485814 olgasoulga https://padlet.com/olgasoulga/5c4ks4lf8fnk8o08/wish/2178488563 Light energy is generally transformed into heat energy when light waves are absorbed by matter. ]]> 2022-05-11 00:36:09 UTC https://padlet.com/olgasoulga/5c4ks4lf8fnk8o08/wish/2178488563 olgasoulga https://padlet.com/olgasoulga/5c4ks4lf8fnk8o08/wish/2178493565 -The wavelength of a wave is the distance from one point on a wave to the same point on the next wave (e.g. crest to crest). 
-Wavelength is measured in units of distance, usually meters.]]> 2022-05-11 00:40:14 UTC https://padlet.com/olgasoulga/5c4ks4lf8fnk8o08/wish/2178493565 olgasoulga https://padlet.com/olgasoulga/5c4ks4lf8fnk8o08/wish/2178495453 -The frequency of wave is how many waves pass a given point per unit of time (usually one second). 
-Frequency is measured in Hertz.]]> 2022-05-11 00:41:45 UTC https://padlet.com/olgasoulga/5c4ks4lf8fnk8o08/wish/2178495453 olgasoulga https://padlet.com/olgasoulga/5c4ks4lf8fnk8o08/wish/2178497566 -The amplitude of a wave is the height of the wave from rest position.
-Amplitude is measured in units of distance, usually meters.]]> 2022-05-11 00:43:21 UTC https://padlet.com/olgasoulga/5c4ks4lf8fnk8o08/wish/2178497566 olgasoulga https://padlet.com/olgasoulga/5c4ks4lf8fnk8o08/wish/2178500575 Using waves to carry digital signals is a more reliable way to encode and transmit information than using waves to carry analog signals. ]]> 2022-05-11 00:45:55 UTC https://padlet.com/olgasoulga/5c4ks4lf8fnk8o08/wish/2178500575 olgasoulga https://padlet.com/olgasoulga/5c4ks4lf8fnk8o08/wish/2178503128 The wavelength and frequency of a wave are related to one another by the speed of travel of the wave.]]> 2022-05-11 00:48:10 UTC https://padlet.com/olgasoulga/5c4ks4lf8fnk8o08/wish/2178503128 olgasoulga https://padlet.com/olgasoulga/5c4ks4lf8fnk8o08/wish/2178506508 The properties of waves are related to observable properties of sound and light (brightness, color, pitch, volume). ]]> 2022-05-11 00:50:56 UTC https://padlet.com/olgasoulga/5c4ks4lf8fnk8o08/wish/2178506508 olgasoulga https://padlet.com/olgasoulga/5c4ks4lf8fnk8o08/wish/2178513558 Light waves travel in a straight path, except at surfaces between different transparent materials (e.g., air and water, air and glass) where the wave bends. ]]> 2022-05-11 00:56:45 UTC https://padlet.com/olgasoulga/5c4ks4lf8fnk8o08/wish/2178513558 olgasoulga https://padlet.com/olgasoulga/5c4ks4lf8fnk8o08/wish/2178519329 The amount/angle that light waves bend at the boundary between two transparent materials depends upon the frequency of the light wave (and the materials!). ]]> 2022-05-11 01:01:43 UTC https://padlet.com/olgasoulga/5c4ks4lf8fnk8o08/wish/2178519329 olgasoulga https://padlet.com/olgasoulga/5c4ks4lf8fnk8o08/wish/2178524332 Light waves have oscillations that are perpendicular to the direction of the disturbance. Sound waves (in air) have oscillations that move in the same direction as that of the disturbance. ]]> 2022-05-11 01:06:12 UTC https://padlet.com/olgasoulga/5c4ks4lf8fnk8o08/wish/2178524332 olgasoulga https://padlet.com/olgasoulga/5c4ks4lf8fnk8o08/wish/2178526206 Green- big ideas
Yellow-smaller ideas
Purple- ideas that may or may not belong in 8.3]]> 2022-05-11 01:07:43 UTC https://padlet.com/olgasoulga/5c4ks4lf8fnk8o08/wish/2178526206 olgasoulga https://padlet.com/olgasoulga/5c4ks4lf8fnk8o08/wish/2178531215 The frequency of a wave is determined by its source. Different objects vibrate at different frequencies.]]> 2022-05-11 01:11:43 UTC https://padlet.com/olgasoulga/5c4ks4lf8fnk8o08/wish/2178531215 olgasoulga https://padlet.com/olgasoulga/5c4ks4lf8fnk8o08/wish/2178533191 The amplitude of a wave depends on several factors: its source, the medium it’s traveling in, distance travelled, etc.

]]> 2022-05-11 01:13:15 UTC https://padlet.com/olgasoulga/5c4ks4lf8fnk8o08/wish/2178533191 olgasoulga https://padlet.com/olgasoulga/5c4ks4lf8fnk8o08/wish/2178536844 Light can be reflected in a single direction by a mirror (preserving the image), or in many directions (scattered) by any object, which is how we see objects. 

]]> 2022-05-11 01:16:08 UTC https://padlet.com/olgasoulga/5c4ks4lf8fnk8o08/wish/2178536844 olgasoulga https://padlet.com/olgasoulga/5c4ks4lf8fnk8o08/wish/2178541750 Different materials reflect some frequencies of light waves and absorb others, which is why the materials appear the color they do (i.e., a red shirt is red because it reflects red light waves and absorbs other frequencies).]]> 2022-05-11 01:19:38 UTC https://padlet.com/olgasoulga/5c4ks4lf8fnk8o08/wish/2178541750 olgasoulga https://padlet.com/olgasoulga/5c4ks4lf8fnk8o08/wish/2178543444 A digital signal is a pattern of high/low or on/off, with nothing in between.]]> 2022-05-11 01:20:48 UTC https://padlet.com/olgasoulga/5c4ks4lf8fnk8o08/wish/2178543444 olgasoulga https://padlet.com/olgasoulga/5c4ks4lf8fnk8o08/wish/2178543746 An analog signal is one that can be any value – high, low, medium, etc.]]> 2022-05-11 01:21:00 UTC https://padlet.com/olgasoulga/5c4ks4lf8fnk8o08/wish/2178543746 olgasoulga https://padlet.com/olgasoulga/5c4ks4lf8fnk8o08/wish/2178545304 Information is sent using waves by encoding a pattern either in changes of frequency or changes of amplitude.

]]> 2022-05-11 01:22:06 UTC https://padlet.com/olgasoulga/5c4ks4lf8fnk8o08/wish/2178545304 olgasoulga https://padlet.com/olgasoulga/5c4ks4lf8fnk8o08/wish/2178546722 Some frequencies of light are invisible. (may be necessary to address based on AP choice)]]> 2022-05-11 01:23:02 UTC https://padlet.com/olgasoulga/5c4ks4lf8fnk8o08/wish/2178546722 olgasoulga https://padlet.com/olgasoulga/5c4ks4lf8fnk8o08/wish/2179241132 Waves have crests and troughs relative to a rest position. For matter waves, the crests are instances of high density in particles, the troughs are instances of lower density. ]]> 2022-05-11 11:22:13 UTC https://padlet.com/olgasoulga/5c4ks4lf8fnk8o08/wish/2179241132 olgasoulga https://padlet.com/olgasoulga/5c4ks4lf8fnk8o08/wish/2179267804 When waves are reflected, they bounce off the surface of an object.]]> 2022-05-11 11:46:58 UTC https://padlet.com/olgasoulga/5c4ks4lf8fnk8o08/wish/2179267804 olgasoulga https://padlet.com/olgasoulga/5c4ks4lf8fnk8o08/wish/2179268973 When waves are transmitted, they pass from one material into/through another. ]]> 2022-05-11 11:48:06 UTC https://padlet.com/olgasoulga/5c4ks4lf8fnk8o08/wish/2179268973 olgasoulga https://padlet.com/olgasoulga/5c4ks4lf8fnk8o08/wish/2179289804 Light waves are absorbed by the retina, or a part of a device, which generates a signal that is that is transmitted to the brain, or analogous part of a device, where it can be decoded.]]> 2022-05-11 12:05:52 UTC https://padlet.com/olgasoulga/5c4ks4lf8fnk8o08/wish/2179289804 olgasoulga https://padlet.com/olgasoulga/5c4ks4lf8fnk8o08/wish/2179303836 The amplitude of a wave gets smaller as it gets farther from its source. (Note: not in standards but may feel relevant for explaining AP or everyday phenomena, or may be implicit in understanding of need for long distance digital communication)]]> 2022-05-11 12:16:48 UTC https://padlet.com/olgasoulga/5c4ks4lf8fnk8o08/wish/2179303836 olgasoulga https://padlet.com/olgasoulga/5c4ks4lf8fnk8o08/wish/2179450571 Light energy and sound energy, which are transferred as waves, are ultimately examples of kinetic energy.
(Also, S's can look back and realize all forms of energy they have studied can be summarized as kinetic (motion) energy or potential (stored) energy. Students recall that PE can be transformed into KE and vice versa. Energy is energy is energy!) ]]> 2022-05-11 13:46:16 UTC https://padlet.com/olgasoulga/5c4ks4lf8fnk8o08/wish/2179450571