I smell a science storm a-comin'!!
↓ More info and sources below ↓

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References:
"Nature of Argillaceous Odor" (1964) http://www.nature.com/nature/j....ournal/v201/n4923/ab
"Petrichor and Plant Growth" (1965)
http://www.nature.com/nature/j....ournal/v207/n5004/ab
Human nose can detect a trillion smells
http://news.sciencemag.org/bio....logy/2014/03/human-n
Petrichor and fish spawning
http://onlinelibrary.wiley.com..../doi/10.1111/j.1095-
Camels seek out wet soil smells
http://www.theguardian.com/sci....ence/2003/mar/06/sci
Chemistry of petrichor:
http://cen.acs.org/articles/91..../i18/Scent-Rain-Stra
http://www.itsokaytobesmart.co....m/post/85815194542/c
http://www.scientificamerican.....com/article/storm-sc

Joe Hanson - Host and writer
Joe Nicolosi - Director
Amanda Fox - Producer, Spotzen IncKate Eads - Associate Producer
Katie Graham - Camera
Editing/Motion Graphics - Andrew Matthews
Gaffer - John Knudsen

Theme music:
"Ouroboros" by Kevin MacLeod

Stock images via Shutterstock

Produced for PBS Digital Studios
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In today's episode, Phil looks at how gravity plays out across the universe.

This episode is sponsored by Squarespace: http://www.squarespace.com/crashcourse

Check out the Crash Course Astronomy solar system poster here: http://store.dftba.com/product....s/crashcourse-astron

--
Chapters:
Introduction 00:00
Understanding Mass 1:11
What is Gravity? 2:17
Different Types of Orbit 3:41
Escape Velocity 5:30
Why Are Astronauts Weightless? 7:03
Gravity Warps Space 8:17
Review 8:43
--

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PHOTO/VIDEO CREDITS
First photo by Roscosmos / NTSOMZ/ SRC "Planeta" / zelenyikot.livejournal.com
http://www.slate.com/blogs/bad...._astronomy/2013/09/2
http://commons.wikimedia.org/w....iki/File:Portrait_of
http://en.wikipedia.org/wiki/I....saac_Newton#mediavie
http://en.wikipedia.org/wiki/J....ohannes_Kepler#media
http://en.wikipedia.org/wiki/K....aren_L._Nyberg#media
https://www.youtube.com/watch?v=doN4t5NKW-k

Metabolism is a complex process that has a lot more going on than personal trainers and commercials might have you believe. Today we are exploring some of its key parts, including vital nutrients -- such as water, vitamins, minerals, carbs, fats, and proteins -- as well as how anabolic reactions build structures and require energy, while catabolic reactions tear things apart and release energy.

Pssst... we made flashcards to help you review the content in this episode! Find them on the free Crash Course App!

Download it here for Apple Devices: https://apple.co/3d4eyZo
Download it here for Android Devices: https://bit.ly/2SrDulJ

--

Chapters:
Introduction: Metabolism 00:00
Metabolism, Anabolism, & Catabolism 2:30
Essential Nutrients: Water, Vitamins, Minerals 3:47
Carbohydrates 4:44
Lipids 5:53
Proteins 7:15
Review 9:22
Credits 9:57

***

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Hank tells us about the city of Eukaryopolis - the animal cell that is responsible for all the cool things that happen in our bodies.

Table of Contents time codes
1) Robert Hooke 1:59
2) Cilia/Flagella 2:52
3) Cell Membrane 3:32
4) Cytoplasm/Cytoskeleton/Centrosomes 3:58
5) Endoplasmic Reticulum 4:41
6) Ribosomes 5:45
7) Golgi Apparatus 6:00
8) Lysosomes 6:47
9) Nucleus 7:06
10) Mitochondria 9:14

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Today we're going to take a closer look at ecosystems -- which are communities of living organisms in an area interacting with their environment -- and how this relationship between the amount of energy a place receives and the movement of nutrients is what makes the incredible diversity of life possible. We'll also take a look at the patterns we see in the main global biomes, show you why some biomes (like tropical rainforests) are so productive, and discuss an agricultural practice some farmers have employed to help preserve their local ecosystems.

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#CrashCourse #Geography #Ecosystems

Visit https://vote.gov/ to learn how and when to register and vote.
SUBSCRIBE so you don’t miss a video! ►► http://bit.ly/iotbs_sub
↓↓↓ More info and sources below ↓↓↓

In this episode we're joined by a leading political scientist to help us figure out the complex psychological and social factors that motivate us to vote… or not to. We discuss how and why our decision whether or not to vote might not be a rational one. And why it is important to understand that. And why it’s important to vote!

Visit Vote.gov to learn how and when to register and vote.

References and further reading: https://sites.google.com/view/....why-do-we-vote-refer

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How does education work? Where does the money come from? Who pays for it? Is going to college a good investment? Adriene and Jacob are talking today about the economics of education. Most countries require that their citizens get some education, and most countries pay for basic education, but the quality of education can vary widely. And in the US, post-secondary education can come with a lot of costs.

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In which John Green teaches you about Imperialism, but not from the perspective of the colonizers. This week John looks at some Asian perspectives on Imperialism; specifically, writers from countries that were colonized by European powers. We'll look at the writings of Sayyid Jamal ad-Din al-Afghani from the Middle East, Liang Qichao from China, and Rabindranath Tagore from India. these voices from the countries that were colonized give us a sense of how conquered people saw their conquerors, and give an insight into what these nations learned from being dominated by Europe. It's pretty interesting, OK? A lot of this episode is drawn from a fascinating book by Pankaj Mishra called The Ruins of Empire: The Revolt Against the West and the Remaking of Asia. You should read it.

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Hank brings us the story of the electron and describes how reality is a kind of music, discussing electron shells and orbitals, electron configurations, ionization and electron affinities, and how all these things can be understood via the periodic table.

Watch this video in Spanish on our Crash Course en Español channel! https://youtu.be/N5apS0tE67c

Pssst... we made flashcards to help you review the content in this episode! Find them on the free Crash Course App!
Download it here for Apple Devices: https://apple.co/3d4eyZo
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Table of Contents
Snobby Scientists 00:43
Great Dane/Bohr Model 01:57
Electrons as Music 04:13
Electron Shells and Orbitals 04:44
Electron Configurations 05:54
Ionization and Electron Affinities 08:17
Periodic Table 10:18

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Can we really clean our way out of this problem?
We’re on PATREON! Join the community https://www.patreon.com/itsokaytobesmart
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There’s been a lot of talk on YouTube lately about ocean plastic pollution and #TeamSeas. But there hasn’t been enough talk about the **ridiculously unthinkable scale of the ocean plastic pollution problem** or how it intersects with other environmental issues like climate change. And here’s a big spoiler alert: Nearly all environmental scientists agree that ocean plastic pollution isn’t a problem we can clean our way out of. So what CAN we do? That’s what this video is about.

Detailed references and annotations: https://sites.google.com/view/....besmart-plasticpollu

We’d like to thank the following researchers for helpful interviews and background materials for this episode:

Winnie Lau - Pew Charitable Trusts
Dr. Max Liboiron - Civic Laboratory for Environmental Action Research (CLEAR)
Dr. Miriam Goldstein

0:00 Intro
1:21 History of plastic
2:59 How much plastic are we making?
4:28 Plastic is petroleum
5:29 How much plastic is in the ocean?
7:38 How plastic gets to the ocean
9:09 Can we clean our way out of this?
10:30 The ACTUAL solutions
13:09 Final thoughts


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Many organizations have made it their mission to expand the rights of Black Americans. The NAACP and the Urban League are examples of influential organizations with long histories. But a long history or extensive membership isn't always necessary to have an impact. Today, we'll learn about the Black Panthers. They were a relatively small, relatively short-lived political party that had an outsized impact on US history.

Clint's book, How the Word is Passed is available now! https://bookshop.org/books/how....-the-word-is-passed-

Sources and References
Peniel E. Joseph, Waiting ’ Til the Midnight Hour: A Narrative History of Black Power in America (New York: Henry Holt, 2006).
Malcolm X, The Autobiography of Malcolm X, With the assistance of Alex Haley (New York: Ballantine, 1992).
Manning Marable, Malcolm X: A Life of Reinvention (New York: Viking Press, 2011).
Ilyasah Shabazz, Growing up X: A Memoir by the Mother of Malcolm X (Penguin, 2003).
Robyn Spencer, The Revolution Has Come: Black Power, Gender, and the Black Panther Party in Oakland (Duke University Press, 2016).

Watch our videos and review your learning with the Crash Course App!
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How do art and morality intersect? Today we look at an ethically questionable work of art and discuss R. G. Collingwood’s view that art is best when it helps us live better lives. We’ll go over Aristotle’s concept of catharsis and how it can resolve the problem of tragedy. We are also exploring the paradox of fiction and the debate between autonomism and moralism.

--

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In which John Green teaches you how to assess the sources of information you find on the internet. The growing suspicion of expertise is a growing problem on the internet, and it can be very difficult to figure out which sources are authoritative. In this episode John offers some strategies to help you identify credible sources and take into account a source's point of view.

Special thanks to our partners from MediaWise who helped create this series:
The Poynter Institute
The Stanford History Education Group (sheg.stanford.edu)

Follow MediaWise and their fact-checking work across social:
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This video shows how to subtract similar and dissimilar fractions.


You can watch other tutorial videos by clicking the link below.

How to Reduce Fractions to Lowest Terms
https://youtu.be/337DIwfv_mk

How to add mixed numbers with the same denominators
https://youtu.be/jk6nYx-I408

How to Add Dissimilar Fractions https://youtu.be/1uo3Wps9cGI

How to Add Similar Fractions https://youtu.be/sQM67aoR4u0

Divisibility Rules
https://youtu.be/EHq_8goD-6E

How to Solve Equations Involving Different Operations
https://youtu.be/jxgPerdbMaM

How to Find the Greatest Common Factor
https://youtu.be/aJD6I71vJcU


#subtractingdissimilarfractions
#Math&EnglishTV
#TeacherTes
#Mathtutorials
#FilKoreanTV

Thank you so much for watching.
Please subscribe to our channel.
God bless!

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Long division is not hard when you use this fast easy math method.
This long division trick will see you right!


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#fastmathtricks
#mentalmath
#mathtrick

How Many Faces, Edges And Vertices Does A Triangular Prism Have?
Here we’ll look at how to work out the faces, edges and vertices of a triangular prism.
We’ll start by counting the faces, these are the flat surfaces that make the shape. A triangular prism has 5 faces altogether - 2 triangle faces, as well as 3 rectangular faces.
Next we’ll work out how many edges the triangular prism has, which are where two faces meet. It has 9 edges.
Next we’ll count the corners (the corners). A triangular prism has 6 vertices.

For the full playlist for the faces, edges and Vertices of a whole lot of 3D shapes go to https://www.youtube.com/playli....st?list=PLjbxBzUM6SL

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Ratios are said to be in proportion if they equal. This video looks at how to simply see if two ratios are in proportion - that is whether they are equivalent. We then look at how to easily find out how much of a quantity is required to keep something in proportion. To support free math on Patreon (thank you): https://www.patreon.com/tecmath

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This video shows you a quick and simple way to multiply numbers when they end in zero.


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✅ Let's connect:

https://www.youtube.com/c/ImprovedMath

https://www.tiktok.com/@improvedmath1?

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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. 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.



Thanks for watching my channel.