Embedded Files
Objectives
Objectives
One of our main objectives in this challenge is to know why there is life under the ice of the different pols (the Antartic and the Artic).
Definition
Definition
Density is the ratio between the mass of a body and that of the same volume of water (or air, for gases).
Definition.wavFormula
Formula
The formula for density is p = M/V, where p is density, M is mass, and V is volume. Density is commonly expressed in units of grams per cubic centimeter or kilograms per liters.
Formula.wav
Density project.mp4
Experiment
Experiment
What you need:
1 beaker
160ml of water
salt
1 egg
a plastic bar
What you can conclude:
When an egg is immersed in water, it sinks, this is due to its density which is greater than that of water. The egg is "heavier" than water.
The density of salt water is higher than fresh water. The more salt is added to the water the more its density increases, until the salt water becomes "heavier" than the egg. The egg, less dense than salt water, then begins to float.
Experiement.wavAnecdote
Anecdote
Do you know that the Dead Sea is the sea where the density is the highest? And yes, it is 1240 kg / m^3. So you can float effortlessly and read your newspaper as in the photo.
Anecdote.wav
Yakutsk.mp4The coldest city in the world: Yakutsk
The coldest city in the world: Yakutsk
Yakutsk is the capital of Yakutia, an autonomous region of Russia 450 km from the North Pole. The lowest air temperature measured in the region was -71.2 degrees Celsius. It's not like it belongs on earth, it's like living on another planet.
Why is there life under the ice of the poles?
Why is there life under the ice of the poles?
As we all know, the poles are very cold. There's a temperature difference of almost 100 degrees between it and a country that's on the equatorial line. It is really too much and not an environment in which everyone can live. Naturally, the living conditions are different because of this temperature difference.
There's many reasons why this happens. One reason is because liquid water's density is bigger than solid water's (ice) density. And the other reason is that:
There is little life under the poles because of their extreme temperature which is around, on average, -60 ° C for the South pole. The world record was measured at -89 ° C in 1983. In the north, the Arctic is slightly warmer, with an average temperature of -40 ° C, which can drop to -68 ° C. This difference in temperature is explained by the way in which the two poles are made.
To the south, the ice cap is several kilometers thick. The sun's rays cannot therefore penetrate it and the rocky soil under the "White Continent" retains its extreme coldness almost all year round, which could explain the lack of life under the poles.
Why is there life under the ice of the poles.mp3Consequences that would affect our lives if the poles are melted
Consequences that would affect our lives if the poles are melted
What would happen if the Arctic (Greenland) ice sheet melted?
What would happen if the Arctic (Greenland) ice sheet melted?
The consequences of the Arctic melt are seen in the rise in sea level that could go from 61 centimeters to more than two meters. The increase could be "substantially greater" if the Arctic ocean ice disappears faster.
Marine life would also be affected by the disappearance of the Arctic, since greater warming limits the mixing of the water layers in the ocean and, therefore, reduces the oxygen and nutrients on which the aquatic flora and fauna depend.
Audio:
what would happend if the artic ice sheet melted.mp3What would happen if the Antarctic ice sheet melted?
What would happen if the Antarctic ice sheet melted?
A world without Antarctica would be quite different from how we know it. Really this change would also be affected by the melting in the Arctic although now we will focus on Antarctic ice.
The first change we would notice would be the rise of the sea (I could go up to 60m!), which would mainly affect coastal areas or plains. To this fact would be added a rise in temperatures.
Another worrying factor would be the disappearance of krill and native wildlife. As krill is the basis of the food chain if it disappears it would cause the death of the species that feed on it.
Audio:
KAHOOT: Press the image to get in and play our kahoot test
What have we learnt in this challenge?
What have we learnt in this challenge?
Maria Gutierrez: I have learnt that the density of liquid water is bigger than the ice water.
Alba Muñoz: I have learnt that the the rise of the sea isn't the most worrying thing that the poles can melt.
Dayanna Rojas:
Jeanne Deboudt : I have learnt the density formula and how to use it. I also have learnt to do an experiment to demonstrate a physical phenomenon.
Duygu:
Enes:
Sevde Nur:
What part of the challenge did we like the most?
What part of the challenge did we like the most?
Maria Gutierrez: I really liked searching about things that I didn't know and I could improve my knownledge.
Alba Muñoz: I enjoyed finding new information about the situation we are living in and the events that could occur.
Jeanne Deboudt : I really enjoyed the experience. It was a fun way to learn more about my subject
Duygu:
Enes:
Sevde Nur:
What we want to improve about this challenge?
What we want to improve about this challenge?
Maria Gutierrez: I would like to improve my English level and maybe the communication between the menbers of the group. But it was the first challenge, so I hope it would be better in the next one.
Alba Muñoz: I want to improve my knowledge about biological phenomena and I think that I do it. I hope to continue like this.
Jeanne Deboudt : I would like to improve my work productivity and English language proficiency.I also hope to meet the people in our group.
Duygu:
Enes:
Sevde Nur:
What did I do in this challenge?
What did I do in this challenge?
Maria Gutierrez: I did the objectives, the part of "Why is there life under the ice of the poles?" and the question "What would happen if the Arctic (Greenland) ice sheet melted?", that is inside the "Consequences that would affect our lives if the poles are melted" part.
Alba Muñoz:
Jeanne Deboudt : I did the definition's part, the formula's part, the experiment's part and the anecdote's part.
Duygu:
Enes:
Sevde Nur:
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