Ice Melt Lab

Ice Melt Lab:
Initial Temp
5c

8c

10c
12.5c   Ice gone

40c

50c
60c

70c

73c

80c

87c Simmer
93c
95c   Light Boil
95.5c   After 1 mins of boil

1) The water cools down because the ice melts changing it to a liquid and the liquid evaporates
2) the ice absorbs heat because when the ice melts it absorbs heat

Chemistry Of Life

1) How does protein that we eat get to the rest our body? when we digest Amino Acids the energy and extra parts that is made used to break the amino acids apart is used to form proteins. Then the blood transports the proteins to the rest of the body

 

2) How does a bowl of pasta? in a bowl of pasta there are carbohydrates. Carbohydrates are used to supply energy to the cell for cell activities.

 

3) why do we need fats? We need fats because we need Phospho Lipid Bilayer which are present in all fats. we need this because it protects the middle of the cell and it helps with homeostasis.  

Five Chemical Reactions

The five chemical reactions are

• Synthesis- is when two or more substances combine to form another more complicated substance 
• Decomposition- Opposite of synthesis, One substance breaks down into two or more simpler substances
• Single Displacement- Occurs when one element replaces another element in a compound
• Double Displacement- Two different atoms in two different compounds exchange places
• Combustion- A hydrocarbon reacts with oxygen, the products of combustion are always water + carbon dioxide 

Synthesis- when we lit the steel wool on fire
Fe+O2+-->Fe2+ O3

Displacement- nail in copper sulfate
Fe+CuSo4--> Cu + Fe2(So4)3

Trends in the Periodic Table

This week in class we talked and learned about the Periodic Table. The Periodic Table is organised by the type of metals. The most metallic metals are on the far right side, while the least metallic metals (gases) are to the far left. the middle group is called transition metals. A period is the metals going horizontal on the periodic table, a group is the metals going vertical. Electron Affinity sets a trend because the atoms above it are always larger. The trend of ionization energy is when the atomic number rapidly increases.

Flame Test Lab

Introduction: Some metal ions can be identified by the color of their flame during a flame test. Different elements placed into a flame will turn the flame different colors.

Essential Question: What metals do colors indicate?

When solutions of a metal get burned they give off a certain color. When elements are heated the electrons take that energy and and move to an outer energy level. You can use the color that the element changes to when heated to identify the element.

Law of conservation of mass

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In each experiment we tested the Law of conservation of matter. In the first one after trial after trial the mass before mixing went down and after mixing the mass went up, after mixing the chemicals looked like white gell. in the second experimentwhen we put the white tablet in water and then that made gas. the mass went down a lot after shaking the bottle. One difficult thing i had to deal with was makng the air not effect the expirement while finding the mass of the water bottle. I conclude that the Law of conservation of matter is true.

Elements of a star

Where do the elements of stars come from? Before we watched this video and read the packet i had no idea where the elements of a star came from. Over many years the scientists are trying to figure out what caused the elements of a star to form and be the way it is now. Now seeing how our stars have been formed i am very interested in the solar system now. The Universe has come from many years of trial and error.

The universes elements all came from many different things. Although scientists think it all came from one thing, a Super Nova. this is what made our universe. The main element in a star is Hydrogen, where this is found in most stars. Another cause of stars are Nuclear Fusion to form a strong nucleus. With out stars our Solar System would not be able to function.