Objective 6 for Homework 10

1.  Acid - A substance that is sour in taste and lower that seven on the pH scale.

2. Neutralization - when something is in the middle of two sides (like Switzerland:) and that doesn't favor one or the other

3. indicator - a solution that changes color when added to a substance so that you can see where it is on the pH scale

4. corrosive - a substance with an ability to corrode or to "eat" away at a metal

Objective 5 for Homework 10

1. The two parts of digestion are mechanical and chemical.
2. Mechanical digestion is when the physical work is done ( such as chewing or moving the waste into your intestines) and chemical digestion is the breakdown of food with stomach acid.
3. This would cause their body to have to produce a lot more stomach acid which might lead to other problems.
4. the mouth: 7; the stomach: around 2-2.5; the small intestine: 8

Objective 4 for Homework 10

1. Hydrogen ions are found in all acids.
2. When put in water acids form hydrogen ions and bases form hydroxide ions.
4. A substance's pH tells you the amount of H+ ions in it.
5. The substance would have more H+ ions b/c the lower you get on the scale the more H+ ions you get in a substance so a 6 would have .000001 ions and a 3 would have .001ions.

Objective 3 for Homework 10

1. Acids taste sour, give off hydrogen ions, are corrosive, and turn litmus paper red.
2. feel slippery, good for stripping oil and dirt off of human body, turn litmus paper blue, and taste bitter.
3. You can determine whether a substance is an acid or a base by submerging the strip into the substance and if it is blue it is a base and if it is red it is an acid and if it is neither it is water.
4. You can tell by the taste. An acid tastes sour. An example of this would be a lemon b/c lemons are both sour and acidic.

Objective 2 for Homework 10

1. To measure how much something is concentrated you have to know the ratio of solute to solvent.
2. It can be useful b/c it the ability of a substance to dissolve. So if you know how much it can dissolve then you it's maximum concentration.
3. One thing that affects the solubility is molecular size. If a solute has large moleucle then it makes it harder to dissolve things and vice versa.
4. Temperature is needed to break down the solid so that it will be soluable and in liquids as well but it isn't necessary. In a gas it decreases the solubility of a substance.

Objective 1 for Homework 10

1.  A suspension is a heterogeneous fluid (consisting of diverse ingredients) and the particles will eventually settle. An example of this is sand and water. A colloid is a substance that is dispersed throughout another. An example of this is milk. A solution is a mixture in which a solute is dissolved in a solvent. An example of this is sugar in water.
2. The water particles are attracted to the sugar particles and the crystals begin to break appart. This is why it looks as if the crystals disappear.
3. The solute will lower the freezing point to different levels depending on how many particles are dissolved into the water. This rule will also raise the boiling point of a solution.
4. It would make a suspension because the particles were not dissolving or breaking apart from each other when it entered the water, it was just mixing with it and after a while the food coloring will eventually seperate from the water.

Objective 5 for Homework 9

1. Heat engines use thermal energy by heating up the substance inside. When it heats up, turns into a gas, and expands it is then pushed through the turbine. The turbine uses it to power the engine.
2. In an internal combustion engine the feul is burnt inside the cylinder(diesel engine) whereas an external combustion engine the fluid is being heated from an external source. They are similar b/c they both burn/process feul inside of the engine.
3. They use internal combustion engines b/c it would take a lot more feul and work to keep the car running,
4. Evaporation and Condensation occur
5. If the compressor stopped working then the refrigerator wouldn't work because the compressor is the motor and if broke then it wouldn't run and it would get hot inside.

Objective 4 for Homework 9

1. Thermal Energy
2. The particles start bouncing around faster and at a certain temperature it changes state.
3. B/c all of its energy is being put into changing state so it doesn't have enough energy to warm the substance as well.
4. It melts b/c the thermal energy in its surroundings. When the thermal energy around it causes the particles in the solid to bounce around and expand it makes it hard to stick closer together. After a certain amount of heat has been applied to the solid, the particles bounce around so much that they expand and take on a new shape as a liquid.
5. Because when it is heated up, (convection) the water in the potato expands. The skin prevents it from expanding any further so therefore it explodes. If you poke holes i the potato then the water will evaporate out of the potato.

Objective 3 for Homework 9

1. convection, conduction, radiation
2. Heat always rises.
3. A conductor transfers heat well and allows it to move from one place to another and insulators do not transfer heat well and keep the heat in a certain substance. Metal is a conductor and a wool blanket is an insulator.
4. It would work better as a conductor because it has low resistence. If something has low resisitance it means that it is easier to move electrons through. Since thermal heat is transfered through electrons it makes it easier for thermal energy to pass through it.
5. Personally I would build a fire. I would do this because although putting up a tent(which is convection)  would help, it wouldn't be as warm. If I were to build a fire, that would be radiation and I would become warmer faster.

Objective 2 for Homework 9

1. Bulb thermometers measure temperature with alcohol or mercury. When you put the thermometer into the thing or person that you need to know the temperature of the mercury/alcohol expands/ shrinks with changes with temperature difference so when you put it into a cup of water that is 40 degrees Fahrenheit, it shrinks to that number on the side of the thermometer.
2. They are alike because they all measure temperature. They are different because each scale is different. For example, 32 degrees Fahrenheit is equal to 0 degrees Celsius.
3. 5.0 Celsius equals 41 degrees Fahrenheit.
4. 460 degrees Fahrenheit.
5. It would take 50K.
(I would like to thank wiki.answers.com/ for giving me the formula for the last one).

Objective 1 for Homework 9

1. The three commons temperature scales are Fahrenheit, Celsius, and Kelvin.
2. Temperature is the measure of how much thermal energy something has and heat is what atoms give off when they bounce around and produce thermal energy.
3. Well, the specific heat of something is the amount of heat per unit of mass it takes to raise the temperature 1 degree C so if something has a high specific heat then it means that it takes more heat to raise the temperature of one unit of mass by 1 degree C.
4. Because the thermal energy from your hand causes the ice cube's atoms to start moving faster. So fast that they can stay a solid anymore so it becomes water.
5. Because some things are denser than others and have more mass so therefore they have a higher specific heat.

Objective Six for Homework 8

1. Charles Law states that when the pressure and mass of a gas remains the same and the temperature is increased, therefore  volume is increased.
2. quickly
3.Jacques Charles and Nicolas Robert were the first to fly
4. When Robert stepped out the balloon shot over 9,000 feet in the air.

Objective Five for Homework 8

2. because when the balloon's distance from the earth increases the pressure increases so therefore the balloon expands. if the balloon expands too much then it will pop.
3. pressure*volume=constant
4. physicians use Boyle's law to draw blood or to give shots.
5. SCUBA divers use Boyle's law to know how much oxygen they will need.

Objective Four for Homework 8

1. At a warmer temperature there is more energy and at a cooler temperature there isn't as much energy.
2. Because the thermal energy causes the particles in the ice cream to start moving faster and so therefore don't hold their shape.
4. when the particles in a gas slow down from cooling and they turn back into a liquid because they have slowed down so much.
5. when a solid heats up at a rapid pace

Objective Three for Homework 8

2. Kinetic
3. Potential
4. Energy in the frequency of waves such as radio waves and gamma rays.
5. Electric energy. what powers the computer that you are reading this off of.

Objective Two for Homework 8

1. In a chemical change the make up or identity of the substance changes. In a physical change, only the way it looks, feels, etc. changes. Such as water turning to ice.
3. The Law of Conservation of Mass was created by Antoine Lavoisier and it states that the mass of the substances before the reaction= the mass of the product of the reaction
4. Temperature is a measure of how fast the particles of something are moving and thermal energy is the energy that the particles give off when they move faster.
5.Endothermic:baking soda and vinegar, Exothermic: chlorine and sodium(table salt).

Objective One for Homework 8

1. Matter is more useful because weight is the amount of gravitational force the earth has on your body. If you went to the moon you would weigh less because the moon is smaller so therefore it has less gravitational pull. But mass is a measure of how much matter you or an object is made of. so if you went to the moon and calculated the amount of mass your body has, it would be the same on earth.
2. 619.65 centimeters cubed
3. "unit of mass" per "unit of volume cubed"
4. mass/volume=density
5. length*width*height=volume

Elephant Toothpaste

In science, as most of you know we are completing a test. Part of this test requires us choosing a type of reaction (look on www.griffinscienc.com/textbook.html/ if you are confused) to test and talk about to the class. Emillee (my lab partner) and I decided to test exothermic reactions. To test this we are carrying out an experiment called "elephant toothpaste". We performed the kiddie version of this in class today and tomorrow we are going to test the lab version tomorrow. I will post both videos tomorrow so that y'all can compare the two.

New Cousin!

Hi guys so as some of you know my cousin and her husband just adopted a baby from China and they arrived in Charlotte last night. Well we went to the airport to see him and he is absolutely ADORABLE!!! He is definitely a people person and a very happy baby. He is a very easy baby and fits into our family. Compared to most other adopted babies he has adapted to his new parents exceptionally well. We are very glad to have him and hope to have another one soon. Welcome to the family Keaton Ellis Tian Yu. We love you!!

Erwin Schroedinger

So apparently this Erwin Schroedinger is a BEAST!! He is really smart and did some pretty cool stuff with the atom and physics and a bunch of other stuff. So if you have recently discovered how interesting tiny, invisible particles and their discoverers are like me then I am sure you are wondering who this guy is and why he is as a said before a BEAST!! So instead of making you go look him up on google I have summarized it up right below this intro. Just keep on reading. You will see it soon and the faster I shut up the faster you will see it. I will shut up now.
Erwin Schroedinger was an Austrian theoretical physicist who is known as a father of quantum mechanics. He came up with the Schroedinger Equation and won a Nobel prize for it in 1933. He was strongly influenced by Schopenhauer (a German philosopher). A crazy theory that Schroedinger performed was called Schroedinger's cat. Schroedinger's Cat was a famous "illustration" of quantum theory and superposition. It demonstrates the conflict between what quantum theory says about nature and what we see under a microscope. Oddly enough he valued the "beauty" of German poetry and the "severe logic" of ancient grammar. In 1906 -1906 he attended the University of Vienna and came under the influence of Fritz Hasenohrl (a Boltzmann's successor). In 1927 he moved to Berlin because there was a lot of scientific activity going on there at that point. It was there that he took weekly colloquies with much older and more experienced scientists. After Hitler started to try to ruin the world Schroedinger moved to England and continued his studies there. He was then offered a job at Princeton and a job at University of Graz. After much deliberation he ended up taking the one at University of Graz. After the Annexation of Austria he fled to Italy and continued teaching at Oxford and University of Ghent. He then moved to Dublin and became the Director of the School for Theoretical Physics. He retired in Dublin in 1955. He later moved back to Vienna with his wife of thirty years, Annemarie Bertel. He died in Vienna at the age of seventy three.

Question!

So I have a question. should I change my background to jelly beans or should I leave it as is. Please help me decide. Thanks! :)

First Post!

Hi guys! This is my first post on a blog....EVER!!! I am so excited and can't wait until I get started using it. Follow me!:)