Mixtures and Solutions

Homogenous and Heterogeneous Solutions

Homogenous: Homogenous mixture is described using one set of properties. For example water, you would just say water, not this half of the water is brown and this half is green. So the whole quantity of water of one container has the same properties.

Heterogeneous: Heterogeneous mixture is described using more than one set of properties. For example a chocolate chip cocky has the cocky and the chocolate chips, and you can see both of them.

What are they

http://www.youtube.com/watch?v=5WlAFh8pz8w

What is the difference
http://www.youtube.com/watch?v=XLqCRvcVosA


I think that these two videos really helped me because it thought me by giveing me examples of both of them. It also helped me understad how a set of properties can defin a mixture.

Three main types of mixtures

Solutions are mixtures made by mixing a solute and a solvent. The solute is the substance that dissolves. The solvent is the substance that does the dissolving.

Suspensions are heterogeneous mixtures of a solid and a liquid in which the solid does not dissolve. Suspensions will settle when left standing undisturbed.

Colloidal Dispersions are mixtures with characteristics part way between a solution and a suspension. Colloidal dispersions may appear homogeneous but are actually heterogeneous. Colloidal dispersions do not settle when left standing undisturbed for a period of time.

Video

http://www.youtube.com/watch?v=3ROWXs3jtQU

This really helped because he is actually writing everything he is saying.

Desalination Reflection

I really think that it is nice that we can do that because if some people only have salt water in their country with no fresh water, the only thing they could use to actually survive is desalination. Not all people would do that because desalinating water is very expensive. It was fun learning about how you, yourself can desalinate water by only eight steps. It is weird that they have positive and negative effects. I really liked the three ways to desalinate water because they were all different, but all three of them actually cost a lot of money.

Desalination of water

Dolphin Teaches Others To 'Tail Walk' ( writen in the 27.Oct)

Have you ever seen an animal try to show there tail, a trick that were thought by their traners. But its too late, this event has already been seen in other places, Until now and, you will be amazed to know how the skill was found.

It was found by Dr. Mike Bossley who is a researcher at the "Whale and Dolphin Conservation Society", who has been looking at the playful happy "Adelaide Port River" dolphins for a lot of years, he said it all started with Billie who is a 23 year-old adult dolphin.

About five years ago he had saw the dolphin tail walking. When he saw that happen only once or twice in his whole 22-year career, he started to watch her more often, and also he was examening her more carefully. To his surprise, she soon was joined by wave that is another female adult dolphin. However, Wave seemed to enjoy it so much that she started doing it too about once a day. And now it even gets better, five years later, four other dolphins have learned to walk backwards on their tails.

Here is a video: http://www.youtube.com/watch?v=Wk6KC_i7l2A&feature=player_embedded

Reflection:
I think that this is really amazing and interesting. I actually never thought that animals can sometimes be really smart, Even though sometimes they are not as much. But I can't believe that a dolphin actually learned to do that just by watching their trainer teach another dolphin, and then it tries to teach other dolphins to. 

Author: Meera Dolasia on 10/25/2010

New mind reading machine

A group of scientists at the University of Utah in Salt Lake City, said that they may be really close to making a machine that helps translate brain signals into words, an important get through that will allow severely paralyzed people to be able to communicate their thoughts clearly.

The scientists than took the experiment one step further by playing all ten brain patterns at the same time. In this case they were able to pick out the correct word between 28-48 percent of the time - An extremely encouraging result and a huge improvement over the current way of communicating that call for either the blinking of eyes or movement of hands. Now that they have proof of concept, the team is going to work on getting the technology better - by probably rising the size of the electrodes, so that they can get better signals. They hope to have a working example ready in a year or two.

Opinion

Its pretty awesome, unless of course the device falls into the wrong hands - Like your parents or teachers. Now there's a scary thought! I would probably use this on my friend or people in school, so funny. :)

The Lizards Run on Water, Really!!! (Article)

Only when its worried by a predator, you will see its weird ability to run over water. Nicknamed Jesus Christ lizard, the reptiles that range from 200-600 grams in weight and grow up to 3 feet in length, are able perform this outwardly impossible task, thanks to their large feet that have flaps between each toe. Using only these feet, with their arms to the side, the lizards are able to stay on the surface if, they sprint at a fast speed. Besides their ability to sprint away from predators, Basilisks are also very good hide artists - thanks to their color, which ranges from green to olive brown with brown stripes, allowing them to blend in, and sit unnoticed, for hours on the end will eat almost anything ranging from insects to fruits and even flowers. In the wild, their biggest predators are opossums, snakes and raptors. But these sneaky little creatures have learnt to escape quite effectively, first by hiding in trees that are hanging over water and if spotted, leaping in and sprinting across like Usain Bolt - except, even he can't do it over water!

My Opinion
I think that it is very cool when they run on water. And i also whached a video of it and it was vrey funny. It is the first time i hear about somthing like thins to happen. It is very

extraordinary.