The Mills Canyon field trip was fun, i really like the outdoors and walking along the creek jumping from rock to rock, except all of the mosquitos, i felt like i was going to get Malaria.
http://maps.google.com/maps/ms?ie=UTF8&hl=en&msa=0&msid=108268364635364832099.00048575ebd2bb51835d8&z=14
Wednesday, May 26, 2010
Thursday, May 20, 2010
My Chem Standard
A Covalent Bond is: the bond formed by the sharing of a pair of electrons by attracted atoms.
bond formed between nonmetal atoms
electronegativity can affect polarity of the molecule
two atoms share as many electrons as needed to make a full valence shell
An Ionic Bond is: the electrostatic bond between two ions formed through the transfer of one or more electrons.
bond between metal and nonmetal
bond is formed by two opposing charged ions
ions are formed by giving away or receiving an electron from another atom
Wednesday, April 21, 2010
I Propose We Make Glow in the Dark Slime
It only takes one more ingredient to turn normal slime into glowing slime. This is a great Halloween project, though it's fun for any time of the year. Glowing slime is safe for kids to make.
Difficulty: Easy
Time Required: about 15 minutes
Here's How:
- Basically, you make glowing slime by adding zinc sulfide or glowing paint to normal slime. I have a lot of slime recipes listed. As written, these instructions make a clear slime that glows in the dark. However, you could add zinc sulfide to any of the recipes for slime with different characteristics.
- The slime is made by preparing two separate solutions, which are then mixed. You can double, triple, etc. the recipe if you want more slime. The ratio is 3 parts PVA or glue solution to 1 part borax solution, with a little glow-in-the-dark agent thrown in (measurement isn't critical).
- First, let's prepare the glue gel or polyvinyl alcohol (PVA) solution. If you have polyvinyl alcohol, you want to make a 4% polyvinyl alcohol solution. 4 grams of PVA in 100 ml of water is great, but the project still works if your solution is a different percent of PVA (just takes more or less). Most people do not have PVA sitting around their homes. You can make a glue gel solution by mixing 1 part of glue gel (either clear or pale blue) with 3 parts of warm water. For example, you could mix 1 tablespoon glue with 3 tablespoons warm water, or 1/3 cup glue with 1 cup of warm water.
- Stir the glow agent into the glue gel or PVA solution. You want 1/8 teaspoon of zinc sulfide powder per 30 ml (2 tablespoons) of solution. If you cannot find zinc sulfide powder, you can stir in some glow-in-the-dark paint. You can find glowing paint at some paint stores or glowing paint powder (which is zinc sulfide) at craft or hobby stores. The zinc sulfide or paint powder will not dissolve. You just want it mixed in really well. Please read the label on the paint to make sure it is safe enough for your purposes.
- The other solution you need is a saturated borax solution. If you are in a chemistry lab, you can make this by mixing 4 g of borax with 100 ml warm water. Again, most of us aren't going to be doing the project in a lab. You can make a saturated borax solution by stirring borax into warm water until it stops dissolving, leaving borax at the bottom of the glass.
- Mix together 30 ml (2 tablespoons) of PVA or glue gel solution with 10 ml (2 teaspoons) of borax solution. You can use a spoon and a cup or you can just squish it together with your hands or inside a sealed baggie.
- The phosphorescent glow is activated by shining a light on the slime. Then you turn out the lights and it will glow. Please don't eat the slime. The slime solution itself isn't exactly toxic, but it isn't good for you, either. Zinc sulfide can be irritating to the skin, so wash your hands after playing with this slime. It may be harmful if swallowed, not because ZnS is toxic, but because it can react to form hydrogen sulfide gas, which isn't great for you. In a nutshell: wash your hands after using the slime and do not eat it. Do not inhale or ingest the glow-in-the-dark ingredient, whichever you choose to use.
- Store your slime in a baggie or other sealed container to keep it from evsporating. You can refrigerate it if desired. The slime cleans up well with soap and water.
Tips:
- I got a glowing paint called 'Glow Away' at Michael's craft store, for $1.99, that is good for many, many batches of glowing slime (or other glowing projects). It's safe, washes away with water, and is easy to mix into the slime gel. It was located with the tempera paints. Other products may work equally well, just be sure to check the label for safety information.
- I use Elmer's non-toxic blue glue gel for this project, sold with school supplies, but there is a clear glue gel made by another manufacturer, plus there are red or blue glue gels with stars and glitter that you could use.
- Where I live, borax is sold in stores right next to laundry detergent. If you don't see it there, try looking near household cleaning chemicals or on the insecticide aisle (note: boric acid isn't the same chemical, so don't make substitutions).
What You Need:
- Elmer's glue gel or 4% polyvinyl alcohol solution
- 4% (saturated) borax solution
- phosphorescent zinc sulfide (ZnS) or glowing paint
- measuring cups/spoons
- bowl or ziploc baggie
- spoon (optional)
Friday, March 26, 2010
Crash Bandicoot
Jim-Jay and I are talking about how amazing the Crash bandicoot games are, they PWN, personally, my favorite is the third one, but that depends on the person.
Do you read these?
Mr. Olson,
Do you read our blogs, Joseph is wondering and I think it is a very possible chance that you may not, so do you or do you not, that is the question?
Aria thinks hes cool
He thinks hes the shit but hes not, sometimes he can be pretty cool but other times he shows off for his butt buddy jordan, its pretty gay.
david webb
On wednesday David Webb, an amazing man with the american vacuum association, came to our class and presented, sadly i have been sick and missed his awesome presentation.
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