Guess Who's Back?

After a few months of recovery, I'm back in business and blogging. Maybe I'll do a post about the science of brain surgery. Dain bramage. Full craniotomy was January 26, I was released from the hospital on February 4th and arrived home on the 5th, Superbowl Sunday. Packers won and I was able to sleep in my own room for for the first time in a while. I haven't been blogging because I'm still not in science class and therefore this blog has fallen dormant.

snowy snowy snow

Southerners don't do well with this here "snow" stuff. 3 inches is  reason enough to shut down the city.

Homework due on December 2 at midnight

Objective #1-
1. Solutions have the smallest particle size and are homogeneous throughout. Colloids have larger particle sizes and are mostly homogeneous, but settle reasonably quickly. Suspensions mix the solute and the solvent very little, if at all.
2. The particles of a solute mix with the solvent's particles when a solution forms.
3. I'm not exactly sure I understand this question...
4. I think that when you mix blue food coloring and water you have made a solution. The particles are all mixed together and it looks the same throughout.
5. Solutes generally raise the solvents freezing and boiling points.

Objective #2-
1.
2.Soluability can help you identify an unknown substance by testing how much solute will go into a solvent.
3.The temperature,  pressure, and how much you stir the solution.
4.
5.

Objective #3-
1. sour taste
conducts electrons
reacts with a base to neutralize
produces hydrogen ions
2.  bitter taste
changes Litmus paper to blue (sometimes)
produces hydroxide ions
feels "slippery"
3. Acids turn "red," bases turn "blue."
4. Google it. :) or ask Mr. Harrelson. Or you could be a nerd and extract some sort of liquid from it then test with litmus paper. Anything citrus is absolutely an acid though.
5.Fertilizer contains lots of harsh chemicals which could give you a chemical burn.

Objective #4-
1. Acids produce hydrogen ions
2. Hydrogen ions or Hydroxide ions
3. H3O+ and NO3-
4. a substance's pH tells you how strong of an acid or base it is. 7 is neutral. >7 is a base. <7 is an acid.
5.Acid in the stomach corrodes what once was food so that it can produce protein, vitamins, and sugars for your body.

Objective #5-
1. The two parts of digestion are mechanical and chemical digestion. The only reason I know this is from health/p.e. class last year. Our teacher only imparted a few nuggets of knowledges into our thick skulls, but one was this and the other was how to mutilate medical terms. The pronounced "alveoli" like ravioli. Ahhh… The wisdom of Mrs. Catto.
2. Mechanical digestion= chewing and physical changes of the food. Chemical digestion= your stomach acids disintegrating the food.
3. People who have lost teeth cannot perform mechanical digestion to it's fullest extent. They have to gum it to death and then wait for their stomach acids to do the rest.
4. pH in your mouth can be slightly acidic, but generally not below 5. pH in the stomach is very acidic, never above 3. pH in the small intestine is usually a slight base, around 8.
5. pH variations are useful for the chemical reactions that chemically decompose the food.

Objective #6 (Last one!!)-
1. Acid- any substance that has a pH less than 7. Turns litmus paper red, corrosive, produces hydrogen ions.
2.  Neutralization- when an acid and a base cancel each other out to 7 (neutral)
3. indicator- I'm not sure of the context for this…
4.Corrosive- able to "burn" something, usually metal.
5. hydroxide ion-  what bases release. One oxygen atom and one hydrogen atom.. (OH-)


references-
http://answers.yahoo.com/question/index?qid=20090405071302AA2wOnU
http://wiki.answers.com/Q/What_is_the_ph_of_your_small_intestine
http://ezinearticles.com/?What-You-Need-to-Know-About-Your-Stomach-and-Acid-Reflux&id=619738
http://wiki.answers.com/Q/What_is_the_ph_in_your_mouth
http://answers.yahoo.com/question/index?qid=20090405071302AA2wOnU
http://en.wikipedia.org/wiki/Hydroxide

Homework 9 part 1

1. Kelvin, Celsius, and Fahrenheit (not the Taiwanese boy band)
2. The more thermal energy that something gives off, the more heat is felt, and the more the temperature is.
3. Specific heat is the amount of heat per unit of mass needed to make the temperature go up one degree Celsius. From what I researched, water has a high specific heat. Making inferences, I say that conductors have low specific heat and insulators have high specific heat.
4. An ice cube melts in your hand because your hand has a higher degree of temperature than the ice cube and is giving off more thermal energy.
5. Because some materials are conductive and some materials are insulators

sources:
http://www.sparknotes.com/testprep/books/sat2/physics/chapter12section1.rhtml
http://hyperphysics.phy-astr.gsu.edu/hbase/thermo/spht.html

Homework for 10/3 Objective #2

1.
2.
3. That matter can be neither created nor destroyed, Antoine Lavoisier
4. Merriam-Webster defines temperature as a degree of hotness or coldness measured on a definite scale.
thermal energy is (to the best of my abilities to define) energy that is given off and felt as heat.
5. Exothermic reaction- gives off heat, hot to touch. Endothermic takes in heat, feels cold to the touch

Sources-
http://www.merriam-webster.com/dictionary/temperature

Homework for 10/2- Objective #1

1. Mass can't change, weight can.  Gravitational pull has an effect on weight, but it doesn't affect mass.
2. 619.65cm^3
3. grams/centimeter^3
4. density = mass over volume
5. length * width * height

Sources- http://wiki.answers.com/Q/Why_is_mass_more_useful_than_weight_for_measuring_matter

Precipitate (Part 2)

Can you read it? This is my lab report for the precipitate experiment.