http://thecrashcourse.tumblr.com/

sense-of-escape: This cat’s going to be a mother-effing GENIUS!...

Wed, 19 Jun 2013 10:26:38 -0400

This cat’s going to be a mother-effing GENIUS!

He seldom “watches tv” unless it’s a select few shows, yet when Hank Green is talking, Kitty’s intent with focus.

He follows Hank’s movements, paws at him a bit, and then slowly falls asleep to the sound of Hank’s voice.

~~Sorry, it’s a cellphone picture.~~

CRASHCOURSECAT. -Meredith

dftbarecords: Check out these four awesome 4-button packs from...

Tue, 18 Jun 2013 16:50:29 -0400

dftbarecords:

Check out these four awesome 4-button packs from CrashCourse!

You can show your love for Chemistry, US History, World History, or your favorite hosts with these snazzy 1-inch buttons.

Enthalpy: Crash Course Chemistry #18 Energy is like the bestest...

Mon, 17 Jun 2013 22:02:00 -0400

Enthalpy: Crash Course Chemistry #18

Energy is like the bestest best friend ever and yet, most of the time we take it for granted. Hank feels bad for our friend and wants us to learn more about it so that we can understand what it’s trying to tell us - like that any bond between two atoms contains energy. How much energy? That’s not the simplest question to answer, but today Hank will answer it (kinda), by teaching us about a nifty little thing called enthalpy.

If you are paying attention to this episode you’ll learn what the state function is, and how it varies from a path-dependent function; why enthalpy change is different from heat; that bonds are energy and to form and break them they release and absorb heat to and from their environment. You’ll get the quickest introduction to calorimetry ever (more on that in upcoming episodes) and learn the power of Hess’s Law and how to use Germain Hess’s concept of the standard enthalpy of formation to calculate exactly how much heat is produced by any chemical reaction.

perpetual-laowai: Grading highlight: “And then Commodore...

Mon, 17 Jun 2013 09:15:54 -0400

perpetual-laowai:

Grading highlight:

“And then Commodore Chandler Bing, oops I mean Matthew Perry sailed into Edo Harbor”

The children are so witty these days.

Energy & Chemistry: Crash Course Chemistry #17 Grumpy...

Mon, 10 Jun 2013 21:49:59 -0400

Energy & Chemistry: Crash Course Chemistry #17

Grumpy Professor Hank admits to being wrong about how everything is chemicals. But he now wants you to listen as he blows your mind with a new sweeping statement: everything (yes, really everything this time) is energy. What?!
This week, Hank takes us on a quick tour of how thermodynamics is applied in chemistry using his toy trebuchet as an example, because he is a proud nerd.

"Ah, shmurg, it’s time for the mystery document? The rules here are simple. I read the mystery..."

Mon, 10 Jun 2013 13:31:47 -0400

“Ah, shmurg, it’s time for the mystery document? The rules here are simple. I read the mystery document and I’m either shocked by electricity or by the fact that I got it right.”

- John Green, Crash Course US History #17 (via bruceandmary)

tbskyen: John Green and Joseph Ducreux Well I couldn’t NOT do...

Fri, 07 Jun 2013 13:09:34 -0400

tbskyen:

John Green and Joseph Ducreux

Well I couldn’t NOT do it.

War & Expansion: Crash Course US History #17 In which John...

Thu, 06 Jun 2013 18:48:18 -0400

War & Expansion: Crash Course US History #17

In which John Green teaches you about the Mexican-American War in the late 1840s, and the expansion of the United States into the western end of North America. In this episode of Crash Course, US territory finally reaches from the Atlantic coast to the Pacific Ocean. After Oregon was secured from the UK and the southwest was ceded by Mexico, that is. Famous Americans abound in this episode, including James K Polk (Young Hickory, Napoleon of the Stump), Martin Van Buren, Zachary Taylor, and Winfield Scott. You’ll also learn about the California Gold Rush of 1848, and California’s admission as a state, which necessitated the Compromise of 1850. Once more slavery is a crucial issue. Something is going to have to be done about slavery, I think. Maybe it will come to a head next week.

Day Seventy-One:

Thu, 06 Jun 2013 09:40:53 -0400

isjohngreenmybestfriendyet:

John Green is not my best friend yet.

It’s finals week, let the crash course cramming begin!

just—me: And by the way, yes there were bars that allowed...

Wed, 05 Jun 2013 10:22:42 -0400

just—me:

And by the way, yes there were bars that allowed you to drink as much beer as you from a hose for a nickel. Today these establishments are called frat houses.

thought-cafe: Moments from this week’s Crash Course Chemistry:...

Tue, 04 Jun 2013 16:10:09 -0400

thought-cafe:

Moments from this week’s Crash Course Chemistry: Passing Gases. http://youtu.be/TLRZAFU_9Kg

Passing Gases: Effusion, Diffusion and the Velocity of a Gas -...

Mon, 03 Jun 2013 21:03:11 -0400

Passing Gases: Effusion, Diffusion and the Velocity of a Gas - Crash Course Chemistry #16

We have learned over the past few weeks that gases have real-life constraints on how they move here in the non-ideal world. As with most things in chemistry (and also in life) how a gas moves is more complex than it at first appears. In this episode, Hank describes what it means when we talk about the velocity of a gas - to understand gas velocity, we have to know what factors effect it, and how. Hank also teaches you about effusion, diffusion and concentration gradients, before showing off a cool experiment that physically demonstrates the things you have just learned. Sound exciting enough for you? Let’s get started.

*Special Thanks to Matt Young at the University of Montana (Geosciences Department, Environmental Biogeochemistry Lab) who helped with the chemical demonstrations.*

thefaultinourstars: Crash Course Outtakes

Sun, 02 Jun 2013 13:20:52 -0400

thefaultinourstars:

Crash Course Outtakes

CRASH COURSE Outtakes

Thu, 30 May 2013 20:51:25 -0400

CRASH COURSE Outtakes

Crash Course Outtakes In which John Green teaches you that...

Thu, 30 May 2013 14:43:03 -0400

Crash Course Outtakes

In which John Green teaches you that things don’t always go as planned on the Crash Course set. Here we have outtakes from our Crash Course in Literature and some of the early US History episodes. Warning: there is some censored profanity in this video. It’s pretty mild, you can probably handle it.

Partial Pressures & Vapor Pressure: Crash Course Chemistry...

Tue, 28 May 2013 21:21:48 -0400

Partial Pressures & Vapor Pressure: Crash Course Chemistry #15

This week we continue to spend quality time with gases, more deeply investigating some principles regarding pressure - including John Dalton’s Law of Partial Pressures, vapor pressure - and demonstrating the method for collecting gas over water.

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Tue, 28 May 2013 12:21:55 -0400

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"Why did they train Luke up and not Princess Leia who was cooler, and had more to fight for, and was..."

Fri, 24 May 2013 14:42:01 -0400

“Why did they train Luke up and not Princess Leia who was cooler, and had more to fight for, and was less screwed up? Patriarchy!”

- John Green in his newest Crash Course video (via kinuimani)

Women in the 19th Century: Crash Course US History #16 In which...

Thu, 23 May 2013 20:48:23 -0400

Women in the 19th Century: Crash Course US History #16

In which John Green finally gets around to talking about some women’s history. In the 19th Century, the United States was changing rapidly, as we noted in the recent Market Revolution and Reform Movements episodes. Things were also in a state of flux for women. The reform movements, which were in large part driven by women, gave these self-same women the idea that they could work on their own behalf, and radically improve the state of their own lives. So, while these women were working on prison reform, education reform, and abolition, they also started talking about equal rights, universal suffrage, temperance, and fair pay. Women like Susan B. Anthony, Carry Nation, Elizabeth Cady Stanton, the Grimkés, and Lucretia Mott strove tirelessly to improve the lot of American women, and it worked, eventually. John will teach you about the Christian Temperance Union, the Seneca Falls Convention, the Declaration of Sentiments, and a whole bunch of other stuff that made life better for women.

Real Gases: Crash Course Chemistry #14 Hank bursts our ideal gas...

Mon, 20 May 2013 20:59:29 -0400

Real Gases: Crash Course Chemistry #14

Hank bursts our ideal gas law bubble, er, balloon, and brings us back to reality, explaining how the constants in the gas law aren’t all that constant; how the ideal gas law we’ve spent the past two weeks with has to be corrected for volume because atoms and molecules take up space and for pressure because they’re attracted to each other; that Einstein was behind a lot more of what we know today than most people realize; and how a Dutch scientist named Johannes van der Waals figured out those correction factors in the late 19th century and earned a Nobel Prize for his efforts.