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355 notas &

Anônimo perguntou: Help! I am so incredibly terrible at balancing chemical equations and I'm in honors science and its caused me to drop from a 96% to an 81% any advice or tips??


A lot of people have trouble with balancing equations, so I’m going to explain how I teach them in the hope it might help a few people. I don’t know if it’ll work for you, but I teach my pupils how to balance them using Lego. Let’s use a displacement reaction as an example:


Obviously, you can’t change any of the formulae, so I’ve boxed them off as a reminder. You can only put numbers in front of the different elements or compounds in the equation to balance it. To start with allocate a different coloured lego to each element in the equation. I’m going to use blue for aluminium, green for copper, yellow for sulfur and red for oxygen. I’m also going to use circles because I’m too lazy to draw lego. Just, I don’t know, pretend they’re Lego:

Now, that’s already looking a little more complicated. But remember, all we want to do is ensure we’ve got the same number of each element (each colour circle) on either side of the dotted line. You can see at the moment we’re short of one aluminium (blue), two sulfurs (yellow), and quite a few oxygens (red)! Since aluminium’s the easiest one to solve, let’s do that first - you just need one more blue circle on the left, so if we put a two in front of Al, that solves it:

We also need another two sulfurs. We can achieve that by putting a 3 in front of CuSO4. However, we’ve got to bear in mind that doing this multiplies all the elements in that compound by three. So, as well as ending up with three sulfurs, we’ll also get three coppers and twelve oxygens:


That turns out to have been quite useful, since we’ve now got the right number of sulfurs and oxygens. However, we’ve now got three coppers on the left, when we only have one on the right. That’s easy to fix with a three in front of copper:


And there we have our balanced equation - you can see we’ve now got the exact right number of each element (or each coloured circle/lego). Hope that method helps you!

34.878 notas &



A beautifully done animation on how you became you.

See the full video here as I left out some really cool parts.

From 300 or so million down to ONE.


Let’s think about this for a moment. The US population is roughly 330 million human beings. For the purposes of demonstration, take almost the ENTIRE POPULATION OF THE US and put them on the west coast, packed as tightly as possible. You’re just chillin, somewhere south of Pasadena let’s say, trying to get free, sweating and hungry with a desire you’ve never experienced before. You know you’re going to die though you think you’ll be the one to make it.

Then like the ULTIMATE hunger games of GENETIC WIN you traverse across the country desperately trying to get to the goal with absolute disregard for the other 299 million people. Your mom, dad, brother, sister, grandma, everyone you’ve ever known dies. You somehow get to the end. Where you bust through a gated base only to be sealed in and combined with another human to make a brand NEW human.

300,000,000 and you’re the only survivor. And your prize is to essentially die and reconstitute into a new being.

That’s awesome.

(via courteousaviarist)

67 notas &


Electron Microscope Images
from the 2011 Embryology Summer Course
at the Marine Biological Laboratory in Woods Hole, Massachusetts

Every year, some of the coolest images taken during the course compete to be on the cover of an issue of the scientific journal Development

The winner was: [1] The ventral surface of a skate (genus Raja) treated with alcian blue (which stains cartilage) and alizarin red (which stains bone). The squiggly lines surrounding the face are ampullary canals, which act as an electro-sensory system.  Taken by David Gold, Lynn Kee and Meghan Morrissey and chosen by readers of the Node 
SOURCE:  Cover Photo — June 15, 2012

[2] Veiled Chameleon (Chamaeleo calyptratus)
[3] Mouse (Mus musculus)
[4] Corn Snake (Pantherophis guttatus) SOURCE: MBL Cover Contest

89 notas &


Malamp: Reliquaries  >  Biological Specimens as Art
By Kyle Hill  || April 8, 2014 || DiscoverMagazine

These Frogs Are Nature’s Mistakes…And They Are Beautiful

Since 1996, visual artist and biologist Brandon Ballengée has been fascinated with the physical deformities of amphibians. As you can see, his interest goes beyond his extensive scientific research on the topic. In an ongoing art project entitled Malamp: Reliquaries, Ballengée uses the unique process of “clearing and staining” biological specimens to highlight the hidden beauty in terminally deformed frogs.

  1. DFA147: Phaethon. 2013. Unique Iris print on Arches watercolor paper. Cleared and stained Pacific tree frog collected in Aptos, California in scientific collaboration with Stanley K. Sessions.
  2. DFB33: Hekate. 2013. Unique Iris print on Arches watercolor paper. Cleared and stained Pacific tree frog collected in Aptos, California in scientific collaboration with Stanley K. Sessions.
  3. DFA117: Galatée. 2001/07. Unique digital-C print on watercolor paper. Cleared and stained Pacific tree frog collected in Aptos, California. In scientific collaboration with Stanley K. Sessions. Title by the poet KuyDelair.
  4. DFA23: Khárôn. 2001/07. Unique digital-C print on watercolor paper. Cleared and stained Pacific tree frog collected in Aptos, California. In scientific collaboration with Stanley K. Sessions. Title by the poet KuyDelair.

All rights reserved by Brandon Ballengée. Images courtesy of the artist and Ronald Feldman Fine Arts, New York.  Via DiscoverMagazine: But Not Simpler

4 notas &


Célula Vegetal.La cara es el Núcleo.Las burbujas rosadas cerca del nucleo es el retículo LisoLa cosa punteada el retículo Rugoso.En naranjo está el aparato de Golgi.En azul los Lisosomas.En rojo el Centrosoma.En verde los Cloroplastos.En café las Mitocondrias.La burbuja grande es la Vacuola.Y las líneas el citoesqueleto.


Célula Vegetal.
La cara es el Núcleo.
Las burbujas rosadas cerca del nucleo es el retículo Liso
La cosa punteada el retículo Rugoso.
En naranjo está el aparato de Golgi.
En azul los Lisosomas.
En rojo el Centrosoma.
En verde los Cloroplastos.
En café las Mitocondrias.
La burbuja grande es la Vacuola.
Y las líneas el citoesqueleto.

8.166 notas &



re-use of salad/lettuce hearts :)

  1. first cut it out from the leaves

  2. then cut a little from the edge but not too much

  3. then cut it into a cube-similar - cut as less leaves and material away as possible but leaves do get moldy and then the whole heart will get moldy too and die

  4. put it in wet soil so that just the tip looks out

  5. put on a plastic cup or something similar to get a high humidity around the sprouting meristem - don’t forget to give it fresh air here and there like every 2-3 days

  6. put the pot to a warm location and wait

  7. after a few days - 2 weeks the new plant will sprout

enjoy your new growing salad plants :)
I’ve tried it and it works with iceberg salad, romaine lettuce, butterhead, lollo rosso salad actually with every lettuce/salad with a heart

En français ci-dessous :)

Read More

(via courteousaviarist)

176.131 notas &

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