Friday, April 17, 2015
Hot Ice Exothermic Reaction
Tuesday, March 17, 2015
Synthetic Diamonds
Synthetic diamonds are artificially made diamonds. They are produced artificially rather than naturally made diamonds.
They are made using high pressure high temperature and chemical vapor deposition. They were first created by the Soviet Union to detonate explosives.
They are usually used in abrasives and polishing tools. 98% of diamonds used industrialy are synthetic.
Today synthetic diamonds effect the world positively.
They can be used cheaply for jewelry. They can be used cheaply for industrial uses.
They have helped science come a long way.
Citations:
Words: http://en.m.wikipedia.org/wiki/Synthetic_diamond
Friday, January 23, 2015
Periodic tables
Past
In the past I knew about how it had metals and non metals. I also knew it was catagorized by atomic number. I even knew that hydrogen is the first element. Lastly I knew that it has 9 rows and 18 columns.
Present
I know everything I used to know. I know now that Mendeleev invented it. I also know that 90 elements occur in nature. Lastly I know that technetium was the first man made element.
Future
I want to learn more about Mendeleev. I also want to learn about how he made it. I even want to know how scientists make new elements. Lastly I want to learn more about all the individual elements.
Tuesday, January 6, 2015
Vision
20/20 Vison
Sharpness of objects at 20 ft
Vison Tests
An eye chart
Correction Options
Eyeglasses
What it is
Oldest form of vision correction
Practical and afordable
How it works
Bends the light coming into the eye
Uses concave and convex lenses
Concave for nearsightedness
Convex for farsightedness
Contact Lenses
What is it
Better for active people
Sit on your eye
Can wear sunglasses with them
Different brands, colors, and materials
How it works
They are directly on your eye so they can be thinner
Corrective surgery
What is it
Changes refractive (light bending) properties of the eyes
The surgery is not cosmetic it is functional
No dependence on glasses or contacts
How it works
Surgeon cuts a flap in the cornea
Opens up the flap
Uses a laser to put in a unique corrective pattern
Citation:
Kozarsky, A (2014) Eye Health and Vision Basics [web] retrieved from; http://www.webmd.com/eye-health/vision-basics Date accessed: January 6, 2015
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