Ecology - Rules for Living on Earth: Crash Course Biology #40

Hank introduces us to ecology - the study of the rules of engagement for all of us earthlings - which seeks to explain why the world looks and acts the way it does. The world is crammed with things, both animate and not, that have been interacting with each other all the time, every day, since life on this planet began, and these interactions depend mostly on just two things... Learn what they are as Crash Course Biology takes its final voyage outside the body and into the entire world.

Can't wait to learn more about ecology? Good news! Crash Course Ecology has 12 episodes you can watch right here:

Table of Contents
1) Ecological Hierarchy 02:01:2
a) Population 02:12
b) Community 02:26:1
c) Ecosystem 02:50
d) Biome 03:22:1
e) Biosphere 03:51

2) Key Ecological Factors 04:07
a) Temperature 05:06:1
b) Water 05:37

3) Biome Type 06:03:1

Want to find Crash Course elsewhere on the internet?

[lavhayez]

I'm having my last ever biology exam tomorrow before graduating high school so I feel like this would be a good time to thank this channel and Hank Green for essentially teaching me everything I needed to know.

[bearwithglasses]

Who else is here for an online biology class? Cuz quartine and stuff.

[patrickmicho]

you make me want to learn more, unlike my school which makes me want to never learn anything ever again. You have reminded me and many other students why science is amazing and interesting. thank you, you are the reason i am doing well in biology

[thaunoi]

I just want to share with you guys at Crash Course that I have never taken a Biology course in my life, but by just watching all 40 videos in this series in this last week I took the Biology CLEP test yesterday and passed with a 55. Thanks a load you guys, you helped me complete my natural science credits!

[Sandlogia]

As a biology student I was fascinated by the way you explain each topic. Thank you Hank for making Crashcourse Biology. Keep up being awesome!

[sierraweitz]

Anyone else here binge watching this in order to prepare for finals

[nevetsjr]

Hank and Crash Course team... thank you for this webseries. My wife is a molecular biologist and this series has allowed me to really talk to her and understand some of her work. Kudos!

[irritableizzy]

studying for biology final... made a playlist that's two hours .... wish me luck

[biancagibbons-morales]

Shoutout to the people who just finished watching all 40 videos in one sitting to study for the ap bio test monday!! woot woot <3

[xRainbowInTheNightx]

I have a Clep Examination for Biology tomorrow morning, and I tried studying for it with a couple of text/workbooks I picked up at the bookstore, but I can say that watching the entire crash course for biology really helped me understand the information. I'm nervous for the exam tomorrow, but I can say that I learned a whole lot more from this series than I did when I was trying to teach myself from the books! Thank you so much for this series, and I'll definitely send more people this way if they need help in bio!!

[Sophie-mfzp]

Crash Course has legitimately saved my life, it includes practically everything in my Biology and Environmental Studies AS Levels!

[lastrachris]

God speed everyone taking the AP Biology test next week, God speed.

[BubblesNKM]

Aw man, I'm about to cry! What a great series, you made me remember how much I love science!! Onwards to more learning!

[grumpledum]

Thank you so much for this series on Biology. I am currently doing a degree on Biology and your videos though brief, give a very good and accurate overview and summary of various topics! It certainly puts all the little details into perspective!

[IamMariCS]

I'm taking Biology this year. Thanks to your videos I get to keep up with my teacher's fast paced lessons. Hope you continue to make videos like this.

[GelidGanef]

Aewsome job on Crashcourse Biology! This and your brother's crash course series are literally my two favorite things on youtube. Looking forward to ecology and whatever else you move into next!

[yodadi]

Love it or hate it, it has been a journey for sure, the fact that somone other than a major university can bring us content like this is a testament to the times, this chapter closed and on to the next, I would like to thank you all from the bottom of my heart for this and every past, present, and future series, you are doing good work, and every person should take note of what a small group of people can do if you really put your heart into it, THANK YOU, HANK AND CRASHCOURSE, THANK

[christinemichele]

Hey guys, and Hank. I've been watching your videos for quite a while and I don't really have any money to help you so I thought I'd give you a story instead. Read if you wish. :)

I don't know when the love of science took hold in me, but I know I was young. Through time and life, I found myself drifting away from that. A few events, and a change of scenery later, I find myself in college for the first time, at age 34. This is relevant to you because when I decided what areas I wanted to study, I came upon your Biology and Chemistry courses. They were the best and most entertaining I found, so I kept watching. I did your whole Biology course thus far, and when I first stepped into my Biology class, I learned that I could have passed the final exam that day. That is how amazing you are. That's how you improve people's lives in a real, tangible way. 

Thanks. 

[celeluwhen]

Thanks Hank and all the team for this CrashCourse! I just finished watching the whole Ecology course, and it was sooo good to feel my brain cells grow in the process. :)

[NeonsStyleHD]

Thanks heaps for a great series. When are you going to do Physics. Not enough people know enough about it.