If you ask a linguist “How many languages are there in the world?” the answer most will give you is “around 7000”. We say “around” because there are several factors that make it difficult to determine what exactly counts as a language, including the difficulty of distinguishing between languages and dialects, various political factors, and the fact that not all languages have the same degree of resources and records. In this episode of Crash Course Linguistics, we’ll explore these 3 factors to learn about world languages and linguistic diversity, as well as the inequities that these factors can create.

Want even more linguistics? Check out the Lingthusiasm podcast, hosted by the writers of Crash Course Linguistics: https://lingthusiasm.com/

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En Makey Makey kan omdanne næsten hvad som helst til en controller. Denne gadget er perfekt til børn som er begyndt at interessere sig for teknologi.

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A Salvo is a military term that stands for the simultaneous firing of several guns, as opposed to gunfire, where all guns fire independently once an order is given.

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Detrivores are heterotrophs that feed on decaying organic matter in an ecosystem. Common examples of detrivores include worms and millipedes. Without decomposers and detrivores, the earth would be covered up with dead organisms.

In this video I review the function of the major organelles of a eukaryotic cell.
Video Guide
00:00 Introduction to Cell organelles
00:21 Types of Cells
00:54 Cell Membrane
01:07 Cytoplasm
01:34 Cytoskeleton
02:03 Ribosomes
02:20 Nucleus
02:32 Rough ER
02:57 Smooth ER
03:22 Vacuole
03:33 Lysosome
03:43 Golgi Complex
04:05 Chloroplasts
04:20 Cell Wall

This video covers the Georgia Science Standard
S7L2. Obtain, evaluate, and communicate information to describe how cell structures, cells,
tissues, organs, and organ systems interact to maintain the basic needs of organisms.
a. Develop a model and construct an explanation of how cell structures (specifically the
nucleus, cytoplasm, cell membrane, cell wall, chloroplasts, lysosome, and mitochondria)
contribute to the function of the cell as a system in obtaining nutrients in order to grow,
reproduce, make needed materials, and process waste.

Cell organelles
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Mitochondris #shorts
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When did dinosaurs live and how do we learn about them? What dinosaur had the most unusual armor? Are there any dinosaurs living today?
Watch this special episode to answer all those questions and learn interesting facts about five astonishing dinosaurs! Don't forget to subscribe!

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This video shows you how to solve a linear equation.


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Improved math is a channel created to provide additional instruction on essential math concepts. I’m passionate about math and I know first-hand how important math concepts are in the real world.

Teachers, parents, guardians, homeschoolers, and students can use these videos to help reinforce math skills. These math videos are designed to help teach yourself math or provide self-study math tools to assist when additional instruction is needed. Teaching math and learning math has changed the way many students learn in this virtual environment and during the pandemic. Having on-demand math videos can provide math tutoring needed when children are not able to get help from their teachers after school hours or when trying to do math at home.

The library of math tutorials that I create can also be used as supplemental instructional material for homeschool math. Each full-length video comes with a subsequent knowledge check or math practice problems which serve as a virtual math topic worksheet to test your understanding of each skill. These videos can be paused to work out the problems on your own, then unpaused to check your answers. All of these videos can be found under the Knowledge Check playlist.

I also have a library of shorter videos (less than 1 minute in length - shorts) that are quick math tips and tricks on basic math topics. Some of these short math help videos include problems that you can work on yourself and submit your answers in the comments. They are all listed under my Math Tips and Tricks playlist.

Improved math is creating more videos every day to cover topics from 4th grade, 5th grade, 6th grade, and 7th-grade math. The videos focus on fractions, basic math operations, geometry and ratios but more topics are being added all the time. If there is a specific topic you would like to see covered, drop me a comment in one of my videos and let me know!

Free math help videos will be posted every Thursday and Friday. For additional math resources, check out my math help website at improvedmath.com where I post math worksheets and answers along with additional context on math basics.


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You can reflect an object in a circle. This is called circle inversion, and is worthy of a google to find out the details.