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Musical Instruments and Sound- Weekly Blog (3/11-3/15)

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Sound Energy - Musical Instruments by SolPass Summary We understand how sound is produced, and how sound waves can travel through different mediums, but how do musical instruments produce sound? There are hundreds of instruments in the world, producing various pitches, tones, and chords. There are three main types of instruments: wind, percussion, and string. The sound is produced differently based on the type of instrument. The first type of instrument is a string instrument. In a string instrument, the sound is created from the vibration of strings. For example, when you play guitar, you pull on the strings. As the strings vibrate, the air molecules start vibrating as well, producing sound. The next type of instruments are wind and brass instruments and are made when we blow sound into them. The shape and position of the instrument affect the overall tone and pitch. The most common kind of wind instrument is a reed instrument. Blowing on the reed causes it to vibrate, mak
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The Food Chain (10/26-10/30)

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This is an example of a land food chain http://www.sheppardsoftware.com/content/animals/kidscorner/foodchain/foodchain2.htm Summary: This week in class we started to learn about the food chain. We watched a video about the food chain, and then we had to answer a few questions. First you need to know that food chains always start with plants and end with animals. But remember, humans are animals. Humans are usually at the top of the food chain. But that does not means that they are always at the top, what if a lion ate the human! Then the lion would be at the top of the food chain. There are different types of food chains. If you want to see a full list then go to this website: http://examples.yourdictionary.com/examples-of-food-chains.html . In the video they talked about the ocean food chain. The ocean food chain is a food chain that happens in the ocean. Here is an example of an ocean food chain: phytoplankton (tiny little plants), get eaten by zooplankton (tiny animals
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Three Sisters - Plate Tectonics (3/19 - 3/23)

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https://upload.wikimedia.org/wikipedia/commons/5/5f/The-Three-Sisters-Szmurlo.jpg Summary: Do you ever wonder how some famous landforms such as mountains and islands are created? There are eight main tectonic plates on the surface of the Earth that make up the lithosphere. The movement of these plates is what causes landforms such as mountains and more. The three sisters mountains in Oregon were created by the movement of tectonic plates over a very long period of time. The three sisters mountains were created by the collision of subduction zones. Subduction zones are a type of convergent boundary where one of the places contains oceanic crust, and the other contains continental crust. The two plates collide, causing the oceanic crust to move downwards into the asthenosphere. The collision that created the three sisters mountains was between the Juan de Fuca tectonic plate and the North American tectonic plate. These amazing landforms were also created by land erosion. The
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