Coriolis Effect

1. What is the Coriolis effect?

Describes how the earth’s rotations effects the movement of water and air.

2. What is subject to the Coriolis effect?

Water and Air

3. What is the direction of deflection in the Northern Hemisphere?

The deflection goes to the right.

4. What is the direction of deflection in the Southern Hemisphere?

The direction of the deflection is to the left

Test your skills on the Coriolis effect.

http://www.montereyinstitute.org/noaa/lesson08/l8ex1.htm

5. What happens if pilots do not correct for the Coriolis effect?

They will either fly to the west if they are going north and will go too far east if they are going  south.

Desalination of Seawater

1.  Describe the physical properties of the substance that remains in the evaporating dish.

The remaining salt in the evaporating dish is a powdery matter is very different from how it started.  However it is the exactly same thing.  The only thing that has changed is the looks of the salt.  

Where is the water that was in the salt water solution?

It had evaporated into the atmosphere. 

What do you think the substance is that remained in the evaporating dish?

It is the solute that had just dissolved in the solute, and is now separated from the solvent, even if it might look different from before, it is probably still the same thing. 

What could you do to identify the substance? 

You can always look at the substance over a microscope and find out what it is from looking at it really closely.  Also, you can test it’s solubility, because each substance has it’s own solubility, for example, sugar has a higher solubility than salt.

Solubility

NOTES:

Different compounds can be combined together to create an entirely new molecule/ compound


For example: 2 hydrogen molecules and 1 oxygen molecule to create a different compound, in this case, that new compound is water.


It is impossible to separate some molecules when combined , unless another chemical reaction is used.


When a mixture is conducted with 2 compounds, you can separate them, however it is very hard, because atoms are so small it is like separating salt grains with sand using chopsticks.

🙂


There are many different ways to separate solutions. For example, you can filter things out.  If you have salt water, you can use a flame and when the water evaporates out, then it will leave the salt.  The evaporated gas will then go through a tube, and it will get cooled, then turned back into fresh water.


FACTS:

Atoms bonded together are known as molecules

Atoms of the same compound can join to form to be molecules.

Compounds are two or more of a different element chemically bonded together

Mixtures are elements that are NOT chemically joined

VIDEO QUES:
1. How does Mr. Anderson define solubility in the video?
Solubility is how good a solute can dissolve in a solvent
2.What is the solubility of talc in 100 mL of 25 °C water? Explain why talc has this solubility.
Talc is not soluble, which also means, Talc cannot dissolve in water.  When you combine these two compounds, you will get a mixture, not a solution.  A mixture is when you combine two things, but the molecules/ atoms don’t have a chemical reaction that allows them to join and create bonds.  A solution, is when you combine two or more elements and they join and bond together.
3.Describe how increasing temperature affects the solubility of solid and liquid solutes.
When you increase the temperature of the solvent, it affects the solubility because when it is heated,  and you can dissolve more of that solute into you solvent.  This is used to create supersaturated solutions.  A supersaturated solution is created when you heat up your solvent and put more solute in it than it can really take when it is still at 20C, then you can cool the solution, and you will then have a supersaturated solution.   For example, if you heat up water, andthen you add more sugar than it can really take, then you cool it down, it will be more then just saturated, it will be REALLY REALLY saturated, also known as supersaturated.
Glossary:
Solute: The element that is being dissolved in a solution
Solvent: The thing that the solute is getting disolved in.
Saturated: When you’ve reached the limit of how much you can dissolve a solute in a solvent.

Boiling Point Reading & Questions

– It is easier for water to boil at a higher altitude, then in a place with a strong force of air, like at sea level.

– Boiling actually starts when big bubbles reach the top of the water’s surface and evaporate.

– You can scientifically tell if water is boiling if the vapor force is equal to the external force.

1. What is the boiling point of water?

100 C

2. How does the boiling point of water change at altitudes below sea level?

The boiling point of water get higher below sea level and that is because there is a higher water pressure under the sea, compared to up in Mount Everest where the air is thin and the external pressure is decreased.  The reason why water boils at a higher temperature under the sea is because the external pressure is forcing the bubbles to go down, and the vapor pressure has a to be a lot higher in order to match the external pressure.

3.Does water containing impurities boil at a higher or lower temperature than pure water? 

If the water has salt or something in it that makes it less dense, then it will boil faster and easier, because the molecules in it are less compact and are easier to boil.

Boiling Point #2

1At what temperature does water boil?

100 C

2.What effect, if any, does the amount of water in the beaker have on the boiling temperature of water? (Look at the class Google doc where everyone has entered their data to help with this question)

The water all boiled at 100C, but they started boiling at different times.  The amount of water in the beaker makes the water either easier to boil or harder.  For example: If you have a tiny amount of water, and you boil it, it will still boil at 100C, but it will boil quicker compared to a beaker with a lot of water in it.  That is because the molecules in the water will start to frizz around quicker and boil faster.  All water boils at 100C, but boil at different timess because the water might change to 100C fast or slowly it doesn’t change the temperature it boils at.

3. Does the temperature of the boiling water increase, decrease, or remain the same after the water has boiled for two minutes? If there was a change, why do you think so?

Usually, the temperature would decrease by just a little.  That is because in our experiments, we had some ice in our beaker and the reason why it decreases a little is because when the ice molecules are starting to turn into water, it will start to decrease a little and a little bit of heat energy is being lost, this happens more obviously wit water because when the water turns indo the vapor, it loses a bit of energy.

Boiling Point #1

1.  I predicted that the ice would completely melt at the temperature of 0C

2.I predicted that the water would boil at 100 C

When heat is added, usually the temperature will rise.  When the temperature rises, the molecules in the liquid was start to get more energy and will break free of their forms.  Also, if the temperature gets colder, the space between the molecules get smaller.  With that, the molecules of water will turn into ice.  Check out the link here for more info —>BP-Lab1-sheet (1)

Sink or Float graph AND reflection!

As a summary, I’ve learnt when a object’s density is less than 1, it will float in water, and if it’s density is MORE than 1, it’ll sink.  I’ve also learnt what density mass and volume really is.   If an object sinks, it’s mass is probably much more than it’s volume, because the object’s density is calculated using   the object’s mass divided by it’s volume.  So if a object had a mass of 10 and a volume of 1, it’s density would be 10, so this object would float in water.  If a object has a mass of 10 and a volume of 20, it’s  density would be 0.5, and it would float in water.  So you could probably guess that if I placed a piece of lead and some feathers that had the same amount of mass in a bucket full of water, which object would float and which object won’t.

 

 

Density and Slope Lab

  • Using your graph, what would the mass of a 12 cubic cm piece of aluminum be?
  • 26.6
  •  Using your graph, what would the mass of a 12 cubic cm piece of gray plastic be?
  • 13
  •  If questions 1 and 2 referred to two equal sized pieces, then which one would be heavier? Aluminum or gray plastic?
  • Aluminum
  •  Which substance has the steeper  graph?
  • Aluminum
  •  Do you think there is any connection between questions 3 and 4? Explain.
  • Yes, because it shows that the steep graph shows that the volume is less and if the mass is more.  And that there is more mass per volume.
  •  Without doing any calculations, how does the density of the gray plastic you used compare to that of aluminum? Explain your reasoning.
  • The Aluminum is always heavier than the plastic and the slope is more/ more dense.
  •  Now calculate the densities of the aluminum and gray plastic. Which on is greater?
  • The plastic
  •  Lead is a very dense metal. One of its uses is for fishing weights. On your graph, sketch in a line showing your best guess about what would result from measuring mass and volume of several pieces of lead. Label the line with the word lead.
  •  On your graph, sketch in a line showing your best guess about what would result from measuring mass and volume of several pieces of plastic foam. Label the line with the word ‘foam’.