SI System - Take Home Quiz

Agnes Szakacs

02/26/15

Period 2/3

Unit 2:2  SI System - Take Home Quiz Questions

Include all work, demonstrating the conversion process.

1. Convert 25.02 mL to L
1. 25.02 X 0.001 = 0.02502 L
2. Convert 7.8g to Kg
1. 7.8 X 0.001 = 0.0078 Kg
3. Convert 101Km to m
1. 101 X 0.001 = 0.101 m
4. Convert .0123Kg to mg
1. .0123 X 10000  = 12300 mg
5. Convert 6.54 dm to m
1. 6.54 X 0.01 =
6. Convert 1008L to dL
1. 1008 X 10^-1= 10080 dL
7. Convert 20 degrees Celsius to Kelvin
1. 20 + 273.15 = 293.15 K
8. Convert 300K to degrees Celsius
1. 300 - 273.15 = 26.85 C
9. Convert 13.5 microliters to milliliters
1. 13.5 X 10^-3 = 0.0135 Milliliters
10. Convert 2.00Kg to micrograms
1. 2.00 X 10^3 = 0.002 Micrograms
11. Convert .202ML to mL
1. .202 X 10^3 = 202 mL
12. Convert .052cg to Kg
1. .052 X 10^-5 = 0.0000052 Kg

Scientific Notation and Significant Digits - Take Home Quiz

Agnes Szakacs

02/26/15

Period 2/3

Unit 2:4  Scientific Notation and Significant Digits - Take Home Quiz Questions

Include all work, demonstrating the solving process.

1. Put .000134040 into scientific notation.
1. 1.34040 X 10^-4
2. Put 10300 into scientific notation.
1. 10300 X 10^4
3. Multiply 2500 and 4000000 in scientific notation.
1. 1 X 10^10
4. Divide 600000 by 300 in scientific notation.
1. 600000/ 300 = 2,000  = 2 X 10^3
5. Put 543210 into scientific notation.
1. 5.4321 X 10^5
6. Multiply 300000000 and 10000 in scientific notation.
1. 3 X 10^12
7. Divide 800 by 400000 in scientific notation.
1. 2 X 10^-3

SI System Conversion Worksheet

02/25/15

Class Lab: Atoms

02/24/15

Today in class we learned about atoms. We talked about electrons, protons, the structure of an atom, and the elements in the periodic table. An atom is the smallest unit of an element. Inside the atom there are energy levels, and then there are electrons on those energy levels. Then inside that theres a ball of neutrons and protons that make a nucleus. Then our teacher started to talk about the periodic table and what kinds of different elements there are. He told us that if you look at an element on the table you can see the element's name, the atomic number, the element's symbol, and atomic mass.

The class then started the lab. We were going to make hydrogen. We had a balloon, a beckon full of water, critic acid, magnesium metal, and citric acid, and an empty beckon.
We, my table partners, twisted magnesium metal, put it in the beckon thats empty, and poured the citric acid into it. Then slowly we poured the water to combine with the acid. Then we attached the balloon to the top of the beckon. The balloon started inflating with helium that was being made at the bottom of the beckon. When there was no more magnesium metal, we tied the balloon and had some fun with it.

After that we got a few students get there balloon and pop it with fire. It was a really funny experiment because everyone screamed when the balloon popped.

Periodic Table - Take Home Quiz #1

Agnes Szakacs

02/23/15

Period 2/3

Unit 3:1 - Periodic Table Take Home Quiz Questions

1. How many valence electrons does zirconium have?
1. Zirconium has 2 valence electrons
2. How many valence electrons does phosphorus have?
1. Phosphorus has 5 valence electrons
3. Arrange these elements according to increasing electronegativity:  O, Ba, V, Al
1. Aluminum 1,61, Vanadium 1,66, Barium 2,6,  Oxygen 3,44
4. Arrange these elements according to increasing size:  Pd, Cs Ca, N
1. Neon 38pm, Palladium 169pm, Calcium 194pm, Cesium 298pm
5. Arrange these elements according to decreasing size:  Al, Fe,F, Si
1. Iron 156pm, Aluminum 118pm, Silicon 111pm, Fluorine 42pm
6. Arrange these elements according to decreasing electronegativity:  Cl, W, Cs, Ag
1. Chlorine 3,16, Cesium 2,66, Silver 2,2, Tungsten 1,3
7. What are the two most common isotopes of He?
1. The Helium-3, and Helium-4
8. What are the two most common isotopes of Li?
1. Li-6, and Li-7
9. What element is in group 5, row 5?
1. Niobium
10. Name an element that has similar reactivity to Calcium.

There is an element called Barium, they are both in the Alkaline Earth Metal Family

The Periodic Table and the Atom Worksheet #2

02/20/15

The Periodic Table and the Atom Worksheet #1

02/20/15

I have finished another worksheet in class right now. There will be more worksheets coming up. I learned about how each element has a different amount of electrons, protons, and neutrons 

Dimensional Analysis Worksheet #1

02/19/15

In class today, I started and finished a work sheet about dimensional analysis. It was a really great way to practice my math and calculating in chemistry.

Article and Exhibition Visit - King Tutankhamun's Treasures

I found this article about King Tutankhamun and his treasures:
http://news.discovery.com/history/ancient-egypt/news-king-tut-tomb.htm

I have actually been to the exhibit in Balboa Park, and it is honestly the most interesting, most professional exhibit I have ever been to before. You see everything that was inside the tomb and how it was build. I thank the people who have made this exhibit and how much time was put in to make every piece have a replica and have every detail put in on every single piece. There was so much to see and so much to learn. The reason why I read this article is because I am interested in the topic of discovering mummies, treasures, and of the past. A person can learned a lot about what happened in the past and how humans lived back then. 

On the right you see King Tut's mask. This mask was placed over the head of his bandaged mummy. It is originally made of solid gold inlaid with glass paste and gemstone, weighing 11 kilograms, or 25 pounds.

On the left you see this beautiful collar that was found within the tomb. I think its the most beautiful collar I have ever seen. Even if it's a replica of the actual. The original is made out of sheet gold. You see Nekhbet, the vulture, and Uto, the serpent. They are the heraldic animals of the Two Lands of Upper and Lower Egypt, and their appearance together symbolizes the unification of the Delta and Nile regions. Nekhbet and Uto are also found on other pieces of jewelry and furniture. This piece was just one of many collars around the neck of the mummy.

On the right you see his throne. There are lions on each side and you see on the chair back shows King Tut sitting down while his wife, Ankhesenamun, rubs ointment on his shoulder. You can also see a wooden foot stool which is inlaid with blue faience and is decorated with images. The original throne was made of wood covered with sheets of gold and inlaid with silver, alabaster (calcite), glass and semiprecious stones. The footstool in glided wood with inlay.




(All these photos, along with many others, were made by me at the San Diego Natural History Museum at Balboa Park) 

Article - Egyptian Mummy with Biblical Tattoo

I read this article about an Egyptian mummy with a biblical tattoo.

http://news.discovery.com/history/ancient-egypt/1300-year-old-egyptian-mummy-had-biblical-tattoo-140326.htm

I found this article interesting because no scientist has ever found or discovered a mummy with the name Michael tattooed on their thigh like this, especially a biblical tattoo. This could mean a new world that we didn't uncover of the past yet. The reason she, the mummy, had the tattoo on her thigh scientist say,"Placing the name on the thigh, as with this mummy, may have some meaning for the hopes of childbirth or protection against sexual violation, as in 'This body is claimed and protected.' Michael is an obvious identity for a tattoo, as this is the most powerful of angels." 

Phases of Matter - Take Home Quiz Questions #2

Agnes Szakacs

02/11/15

Period 2/3

Unit 1:2  Phases of Matter - Take Home Questions

1. Describe the three phases of matter in terms of shape and volume.
1. Solid - A substance that retains its size and shape without a container; a substance whose molecules cannot move freely except to vibrate.
2. Gas - A substance that can only be contained if it is fully surrounded by a container (or held together by gravitational pull); a substance whose molecules have few intermolecular bonds and can move freely.
3. Liquid - A substance that flows and keeps no definite shape because its molecules are loosely packed and constantly moving. It takes the shape of its container but maintains constant volume.
2. Draw a phase change diagram, and label all components.
   
   
   
   
   

3. What are the names and types of phases changes between the various phases?
1. Solid → Liquid: Melting
2. Gas → Liquid: Condensation
3. Liquid → Gas: Vaporization
4. Liquid → Solid: Freezing
5. Gas → Solid: Deposition
6. Solid → Gas: Sublimation
7. Gas → Plasma: Ionization
8. Plasma → Gas: Recombination  
4. Explain how snow forms by deposition.
1. Deposition is a phase transition in which gas forms into solid. When deposition is in process in water vapor it changes directly into ice without first becoming a liquid. Snow is created like this in clouds.
5. Describe how liquid carbon dioxide can be achieved.
1. There are some ways you can do achieve liquid carbon dioxide. You can increase the pressure of the gas. Or you can increase the temperature of the solid.
6. Describe what temperature and pressure combinations typically contribute to a solid, liquid, or gas being formed.

If you would look at the phase change diagram you can see that:

1. Solid → Is at high pressure and low temperature
2. Liquid → Is in the middle of pressure and temperature
3. Gas → Is at low pressure and high temperature

7. Describe how to separate a mixture of two liquids.

The way to separate two liquids is by reaching their boiling point, and by this you can collect the vapor which will contain only one liquid. Also known as distillation.

Phases of Matter WorkSheet (Deleted accidentally)

Agnes Szakacs
02/10/15
Period 2/3 

Phases of Matter WorkSheet #2

         1) "Each substance has its own boiling point." ELI5: How could you use the information from this statement to separate a mixture of two liquids into two more pure liquids? 
Some liquids boil faster than others. If you boil two liquids enough, one liquid will evaporate out of the pot. There is a certain boiling point for each substance. If it becomes hot enough that one liquid will evaporate and you will be left with one liquid.
2) A pressure cooker is used to cook foods faster by increasing the pressure in a chamber. ELI5: How does this work?
A pressure cooker is a sealed pot with a valve that controls the stream pressure inside. As the pot heats up, the liquid inside forms steam, which raises the pressure in the pot. By raising the pressure the liquid heats up the molecules it has in it, and moves faster and farther apart, which will become into steam. This high pressure makes the steam raise to the boiling point of the water in the pot.
3) Snow is not made by rain freezing, but rather by a process of deposition. ELI5: How and why does this occur?
Deposition occurs when sediment transportation are no longer sufficient to overcome the forces of particle weight and friction. When its wet in the mountains and its cold, the moist becomes to form little crystals in the atmosphere, also known as the air. When these tiny ice crystals collide they stick together in clouds to become snowflakes. If enough ice crystals stick together, they’ll become heavy enough to fall to the ground. Then we will have snow, and make snowmen and snow angels.

Take Home Quiz Questions WorkSheet #1

Agnes Szakacs
02/09/15

 Unit 1:1 Introductory Concepts - Take Home Quiz Questions 

     1) Define chemistry and matter.
         Chemistry is connected to science that deals with the identification of the substances of which matter is composed. The investigation of properties and the ways in which they interact, combine, and change. Matter is everything around you. Atoms and molecules are all composed of matter. Matter is anything that has mass and takes up space.
     2) Define substance, element and atom.
         Substance is matter which has a specific composition and properties. Every pure element and compound is a substance. Elements are chemically the most basic substances and cannot be broken down using chemical methods. An atom is the most smallest unit of matter that has the properties of an element. The nucleus, composed of protons and neutrons, is at the center of an atom.
     3) Define mixture, homogeneous and heterogenous.
         A mixture is when everything is combined into one. Homogeneous is a material science that refers to substances and mixtures which are in a single phase. This is the contrast to a substance that is heterogeneous. Heterogeneous and homogeneous are referred to mixtures of materials in chemistry. The difference between heterogeneous and homogeneous mixtures is the degree at which the materials are mixed together and the uniformity of their composition.
     4) Explain the difference between mass and weight.
         Mass and weight are different in science. The mass of an object is a measurement of the amount of matter the object has. Weight is a measure of the force on the object caused by a gravitational field. In other words, weight is how hard gravity pulls on an object.
     5) Explain the difference between a physical and chemical property.
         Physical properties are those that can be observed without changing the identity of the substance. For example, the general properties of matter can be such as color, density, hardness, etc.
     6) Explain the difference between a compound and a mixture.
         The different substances are not chemically joined together. Each substance in the mixture keeps its own properties. The compound has properties different from the elements it contains. Each substance is easily separated from the mixture.
     7) Describe the process of distillation.
         Distillation is a process of separating the component substances from a liquid mixture by selective evaporation and condensation. Distillation may result in essentially complete separation, or it may be a partial separation that increases the concentration of selected components of the mixture.
     8) Provide an example of a gas-gas, liquid-liquid, and solid- solid mixture. Label each mixture as homogeneous or heterogeneous.
         A gas-gas mixture can be air. Air is also a homogenous. A liquid-liquid mixture can be vinegar, also homogenous. A solid-solid mixture can be concrete. Concrete is heterogenous.

Destiny Lab Part 2

Part 2: 02/06/15

When I got done with Destiny Lab Part 1, I got together with my partners, Jake and Isaiah, to start doing part 2 on Friday. What we did was start by collecting four items; Rubbing alcohol, whole milk, water, and baby oil. We then got the scale to measure the density of the liquids. We created a graph to show which liquid had the most and least destiny.

Liquid                            Density
.8g - Rubbing alcohol     .00008
.75 g - Water                 .000075
.7g - Baby oil                 .00007
.35g - Milk                     .000035

Rubbing Alcohol - .8 grams in weight
10mL
.8g/10,000

Water - .75 grams in weight
10mL
.75g/10,000

Baby oil - .7g grams in weight
10mL
.7g/10,000

Milk - .35g grams in weight
10mL
.35g/10,0000

We then got food coloring to show how the layers would look like and mixed them up with each liquid individually. First we got a beaker and put the colored rubbing alcohol in first because it is has the most density. Then we put in water second, then baby oil. The process was going fine, we were getting layers. But when we put in milk last it went right through the baby oil and went into the water. I think I know what went wrong, and it was the whole milk. Maybe the milk had more density then the water and we measured them wrong.

Even though we failed in this lab, we got a cool result. When the milk went through the baby oil it looked like the dip n' dots ice cream and it popped when it reached water which made the milk stream down. To me it looked like someone painted inside the beaker. Overall this lab was fun, even if we didn't' get the results we wanted.

Destiny Lab

Part 1: 02/06/15

Today I started doing the Destiny Lab, it will have two parts. First I got three items together, a penny, a clip, and an eraser. I then got a beaker and filled it up with water up to 230 mL. Then I weighted the three items and got these results;
Penny: 3.5 gram
Clip: 1 gram
Eraser: 1.5 gram

When I dropped then each separately in the beaker the water raised by;
Penny: 1 mL
Eraser: 1.5 mL
Clip: 0.8 mL

By making the equation I got;

Penny: mass 3.5 divide by volume 1 = destiny 3.5
Clip: mass 1 divide by volume 0.8 = destiny 1.25
Eraser: mass 1.5 divide by volume 1.5 = destiny 1

Matter Day 2: Dry Ice

Today there was a group of us who had a dry ice lab because we weren't at school when the whole class made experiments. The teacher was kind enough to get the ice so that we can have the lab.

Dry ice is very, very cold, despite its name. It is so cold it can burn your finger if placed on ice under a few seconds. The correct way to hold the ice is hot potato. Meaning you bounce the ice in one hand to the other. If dry ice starts to "melt" instead of water it gives out gas. We were given a big piece of dry ice to start the lab. When the teacher gave us the ice I started playing with it by pushing it with my finger. It was like a hockey puck. It looked cool the way it was sliding with gas coming from the ice. It had a special effect to my experiment.

What we did for this experiment was place a piece of dry ice into water which was held by a beaker. Once that happened the ice started bubbling and gas started coming out of the beaker.

I also found out something fun, well not really fun but I liked it. If you place a cent on dry ice it makes a loud sound and if the cent is not touched and is there for a while it freezes which to me looks really cool. It reminded me of how a cent would look like if it would be found in ice hundreds of years later.
We also had put a piece of dry ice, 1.5 cm, in a balloon. After a good 2- 5 minutes it inflated itself, making the balloon 16 cm diameter. A few of our group members started playing with the balloon for a little while.

We got dishwasher soap, and covered the top part of the erlenmeyer. We then got a piece of string and covered the string with the soap and ran through the   top of the erlenmeyer and the gas of the ice filled the bubble and exploded.

Phases of Matter Worksheet #1

Today in class I started and finished doing a work sheet. I learned a few new things that I didn't understand before, like homogeneous and heterogeneous and supercritical fluid, which I have never heard of before until now.