Blog Thought 2 for SCH 4U

As you read and discussed in class many organic compounds have been used to solve health, environmental and safety problems. Aside from the three discussed in class (CFCs, DDT, and lead in fuel), research a compound originally designed as a solution which manifested into its own problem.

Write 1 -2 sentences on the original use, the problems which arose and what has been done to resolve this issue.


-Ms. S.

Blog Thought 2 for SCH 3U

Here is a short article taken from "Popular Science" about the use of rare metals in Hybrid cars. Please read the article and post a brief response (1 - 2 sentences). What do you think? Is the decreased CO2 production worth the over usage of rare elements?



ARTICLE

So it turns all those hybrid car owners who turn their environmentally conscious noses up have an unexpected caveat to their green-ness--their cars are sucking up rare earth metals at a disturbing rate.

Rare earth elements take up 17 slots on the periodic table, and are named not for their overall scarcity (they're actually quite common in trace elements throughout the Earth's core) but for the relatively uncommon minerals in which they were originally found; few rare earth elements exist in pure elemental form naturally.

Reuters spoke with commodities trader and "strategic metals expert" Jack Lifton, who claims hybrids such as the Prius uses more rare earths than any object in the world. Neodymium and lanthanum--used in allows in a hybrid's batteries and electric motor's magnets--could become increadibly scarce or even disappear altogether within the next several years. Each Prius uses 2.2 pounds of neodymium in its electric motor magnets, and 20-30 pounds of lanthanum in the batteries. And those amounts will only go up as the Prius's powertrain continues to evolve for more efficiency.

Wind turbines, another green power source, also utilize rare earth metals, and when combined with increased consumption for hybrid cars, total future demand could exceed current supply by up to 40,000 tons.

Blog Thought 2 for SNC 2D

The skin contains many tissue types. One type includes nervous tissue. Because of this we are able to notice when things are hot or cold, and to detect pressure. Think of a time this week your nervous tissue warned your brain/body.
What did your body do in response?

Please include one or two sentences describing the event and your body's response. Remember, there is no right or wrong answer, and your mark is only based upon completion. You have until Oct. 1st to respond.

-Ms. S.

Blog Thought 1 for SNC 2D

The human body has hundreds of different cell types! Each cell type has a specific shape and function. Choose one cell type (that has not already been chosen by another student) and describe it's basic function. \

You should only write 2 or 3 sentences. Your mark is based purely upon completion. Please respond in the comments section by September 17th. Please include your name within your post.

Blog Thought 1 for SCH4U

Carbon is the central atom in organic compounds. Name an organic compound that you use in your everyday life. Describe it's basic function. (1 or 2 sentences).



Your mark is purely based upon completion. You have until Friday, September 17th, to complete this post.
Please make sure to include your name in the comment.

Blog Thought 1 for SCH3U

Elements are everywhere and anywhere. They bond together to create compounds and interact with each other to cause reactions that we use in our everyday lives. Think of a chemical reaction that we use/see everyday and comment below.

Your mark is purely based upon completion. You have until Friday, September 17th, to complete this post.
You must not use the same reaction as another person.
Please make sure to include your name in the comment.