Showing posts with label scientific inquiry. Show all posts
Showing posts with label scientific inquiry. Show all posts

Wednesday, February 4, 2015

Every little thing is NOT alright

Today we remember the fish that made our classroom a brighter place.  We gave Bob Marley (the big blue one), our placo, and ALL of our tetras and guppies (what was left of them) the royal flush and sent them to the big fish tank in the sky.  Now the question remains, what happened?  Did Bob Marley go on a spontaneous murderous feeding frenzy?  Was the tank's chemistry compromised?  Why was there almost nothing left of the smaller fish?
RIP Bob Marley and my little friends.
Of course this discussion lead to a spontaneous and awesome teachable moment with my grade 4s and my previously planned light lesson was thrown right out of the window.  We launched into a full scientific investigation about aquarium chemistry and tested the temperature, dissolved oxygen and pH.  Thank goodness for our recent lessons on scientific inquiry and journal writing!  The students were immersed into the scientific method and advanced water quality chemistry and became my little CSI detectives.  We found that the dissolved oxygen was low and pH was acidic but I still wasn't convinced that it was all of the problem.
 
I spent the rest of the day cleaning out the tank during any free time and we listened to "Three Little Birds" while keeping back the tears.  Okay, maybe it wasn't quite THAT tragic.  When I went to put the heater back in I noticed it was abnormally hot.  Oh bother.  
After school I took the heater and a sample of the water into Big Al's Fish Emporium to have it tested just to be sure.  It turns out the tank chemistry was just about normal.  We determined that the heater went on the fritz and as the smaller fish died (fish boil anyone??), Bob Marley probably ate himself to death!  It is also possible that the leftover rotting bodies threw off some of the nitrates and pH a little bit as well.  The angel fish survived only by their size and that they are tropical beauties of superior genetic stock.  Yeah evolution!  
I bought a new heater and plants and we will let the tank rest for a few weeks before introducing some new fish.  Luckily the friend who gave me the bigger fish has more to donate.  So maybe "every little things gonna be alright" after all.
As I always say, there's always a teachable moment!  What an adventure!!

Saturday, September 13, 2014

Beaumont, we have a problem!

We have had quite a unique experience to follow this week. One of Canada's very own astronauts, Jeremy Hansen, has let us tag along on his adventures in training for a future mission in space. I have had a lot of kids turned on to science and wanting to be astronauts when they grow up.  Amazing!!
NEEMO 19 team getting ready for their last day aboard Aquarius
Jeremy has been spending a week as a member of NEEMO. "NEEMO is a NASA mission that sends groups of astronauts, engineers and scientists to live in Aquarius, the world's only undersea research station, for up to three weeks at a time. The Aquarius habitat and its surroundings provide a convincing analog for space exploration" - NASA
"Back alive with all body parts! Night dive as cool as expected. Luminescence, feeding frenzy, squid..." - JH
Before he spent his week under the sea he put a shout out for simple experiments to do, both at sea level and 19 meters below the surface of the ocean near Key Largo, Florida.  See more about it and the lab we challenged him to try HERE.
  

He accepted our challenge and gave it a try on the surface before going into the deep.  See all about it HERE.  

The results were not at all the same as they were here in Edmonton.  This prompted great discussion about the scientific method and variables that may have altered the experiment.  I always tell kids that science is a process and most of the time your results are inconclusive but lead to refining the experiment and coming up with an even better plan.  


Yesterday he gave our experiment a go while aboard Aquarius with almost three times the atmospheric pressure pushing down on them!!  Here is what he discovered.
 The scientific process at work!  So now we have to come up with an even better experiment with more controlled variables and see if we can do it ourselves here in Beaumont. 

I sent this blog post out into the Twitterverse and broke the internet.  Seriously my phone went CRAZY with notifications.
Here are a few more pictures Jeremy took while out exploring the ocean.  So cool. 
"This wave of small blue Creole Wrasses surrounded us causing a feeding frenzy of Groupers and Barracuda." - JH
"Oh baby! Night dive time. A taste of what's in store just swam by. What you can't see won't hurt you right..." - JH (Anyone else hear Heart singing "Barracuda" while reading this??)

Now this is just for fun.  William Shatner and Chris Hadfield became Twitter friends while Hadfield was aboard the ISS last year.  Jeremy Hansen was trained and gave ground support for Hadfield and his mission.  So from science fiction to science fact, this is just funny ...



 NEEMO Mission 19 has wrappped up and the aquanauts had to decompress for 16 hours before coming to the surface.  So what do you do for 16 hours?


What a great week in science!!!!!

Saturday, September 6, 2014

NEEMO


My science classes have had some pretty amazing opportunities over the past two years.  One of the highlights of last year was Skyping with Major Jeremy Hansen on Earth Day. (See more HERE).

With a new start to the school year my students have been diving into learning about the scientific method.  We have been learning about Jeremy Hansen's training in preparation for an amazing adventure under the sea with NEEMO (NASA Extreme Environment Mission Operations).  


Jeremy put a call out to people to come up with some experiments he can do "under pressure".


Can your science experiment take the pressure? Send me your u... on Twitpic
Last year we did an experiment using gummy bears to demonstrate osmosis.  Please click HERE for more details about the experiment and osmosis.)  

My students wanted to take it one step further and find out if the rate of osmosis is different when the experiment is performed under the sea, at sea-level, and maybe one day even up aboard the ISS.  

So here is the experiment.  We measured the length of a gummy bear and then placed it in a baggy of water.  I normally do this in a petri-dish or bowl but we were thinking that if this experiment to be run with as little equipment as possible.  We measured the bear every half an hour for a three hour period.  If I were to do this again I would perhaps measure once an hour for half of a day.  We decided to only do the experiment with tap water instead of both tap water and salt water because it would make it more complicated to do aboard Aquarius, although the results would be interesting.  Finally we would compare the growth/size of our observations here on dry land and on Aquarius after the same amount of time.  


  
After 2 hours
After 3 hours
Our hypothesis is that the rate of osmosis will be greater (faster) aboard Aquarius due to the difference in pressure (despite it being regulated for those aboard).  If it were to be done, hypothetically, on the ISS we would hypothesis that the rate would be slower due micro-gravity and the lack of pressure (despite it being regulated for those aboard).

The applications of these observations are important as we use these concepts when we look at agriculture, water purification, and the needs to the human body.  These are all vital to learning how to expand our reach into the universe.  

Read more about:

Friday, October 11, 2013

Welcome Dr. Atom Erlenmeyer

I would like to congratulate Cristian, Andrew, and Cartar for helping us name our Mad Scientist.  May I present Dr. Atom Erlenmeyer!

Too see all the other entries please see the comment section here  http://mmemerriman.blogspot.ca/2013/09/nommez-le-scientifique.html

Thursday, September 26, 2013

Nommez le scientifique

Login à votre compte Google et commenter ci-dessous avec votre idée pour le nom de notre scientifique!  Le gagnant sera annoncé avec son / sa photo prise avec notre scientisit et son nouveau nom!
Login to your Google account and comment below with your idea for a name for our scientist!  The winner will be announced with his/her photo taken with our scientisit and his new name!

Tuesday, September 3, 2013

Learning the scientific method

This week in science we are learning all about the scientific method.  I have made a great bulletin board and template to help the kids learn to write a lab report and study the world around them.  So we are starting off with something simple.  

How many drops of water can a penny hold?

Now to come up with an experiment including our variables: manipulated, responding, and controlled.

After we test it we can also come up with some ideas on how to change up this little demonstration to learn something new.

Finally have a look at this video about it and read how it works HERE.





Wednesday, August 14, 2013

La démarche scientifique / Scientific Method

All summer, other than relaxing, I have been thinking about how to teach the scientific method with my class this coming year.  It is a basic foundation that isn't given any focus in the curriculum I teach so I have decided to revamp my class to be more lab focused.  I am in the process of creating a new bulletin board and have a great lab write up template to go with it. My mom is a Super EA and is coming to set up my new science lab on Monday!  Stay tuned!  Download it from my google docs:

The Scientific Method (English)
La demarche scientifique (Francais)





Also thinking of doing something like this
My inspiration
My final result!

Tuesday, June 11, 2013

Chris Hadfield





I have been following Commander Chris Hadfield and his adventures both on, and off, of the International Space Station for months. It has been so amazing to see space and our world through his eyes. He shares pictures of the Earth, videos on science and life in micro-gravity aboard the ISS, and his own brand of colourful music. He is my new hero! Wouldn't it be great to Skype with him or have him come to our school??!! Something for next year!

















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