Write about how the strontium-90 might accumulate in your body (teeth and bones) and how it might affect you. Include your ideas about how its half-life of 28.8 years would be important. Suggest ways that government agencies, such as your state’s department of health, might test for strontium-90. Where in your environment might scientists look for large concentrations of strontium?

• Strontium-90 is the most important radioactive isotope in the environment
• 1790 Adair Crawford and William Cruikshank found non-radioactive strontium in the mineral strontianite in Scotland.
•  Metallic strontium in 1808 by Sir Humphry Davy
• Strontium (chemical symbol Sr) is a silvery metal that rapidly turns yellowish in air. .
• Strontium has 16 known isotopes. Naturally occurring strontium is found as four stable isotopes Sr-84, -86, -87, and -88.
• Strontium-90 is chemically similar to calcium, and tends to deposit in bone and blood-forming tissue (bone marrow). Thus, strontium-90 is referred to as a "bone seeker." Internal exposure to Sr-90 is linked to bone cancer, cancer of the soft tissue near the bone, and leukemia.
  Risk of cancer increases with increased exposure to Sr-90. The risk depends on the concentration of Sr-90 in the environment, and on the exposure conditions.

http://www.epa.gov/radiation/radionuclides/strontium.html#healtheffects

Chem Reflection

This year in chemistry I have really pushed my limits and gone out of my way to do the best I can, I may not be the best listener in the class but I do my best to get all my work done. I don't mess around when it comes to labs, I just do my best and take my time. this year I have learned about how to read the Table of Elements.


Helium   Scientific name
2             Atomic number
He          Symbol
4.003     Atomic Mass


Skills Lab#1
I also enjoyed the lab where we watched Aluminum foil dissolve into a liquid. We had to watch closely with color and the phases it went through,


Precision and Accuracy
precision- a measurement of how closely individual measurements agree with the correct value
accuracy- refers to how closely individual measurements (#'s) agree with the correct or true value.

 

Equations

 D= M/V or Density= Mass/ Volume
M=D(V) or Mass=Density(Volume)
V=(D)M or (Density)Mass


(prefixes)  If you're going down your decimal is moving to the right
SI              If you're going up your decimal is moving to the left
K
   H
     DK
         BASE                  EX: (20cm = .20m) (.032L= 32mL)
                D
                   C
                      M


Percent Error
What you got - Actual answer  X 100
            Actual answer

 

ZEROS
Leading - never (024556)


Trapped- always (66043)


At the end of a # - 

• Number contains a decimal - always
•   Number does not have a decimal -never

LAW OF MULTIPLE PROPORTIONS

• some elements can be more than  one compound when they react together
• Radioactivity - spontaneous emission of radiation from an atom led to the discovery of  (OX B Y)
• discovery of  electrons 1897

# Of Protons = # Of Electrons

 

 

finale essay

essential question: 
The oceans harbor a wide variety of living organisms, each exhibiting adaptations for survival in their particular marine niches.  First analyze the relationship between structure and function in the living organisms studied this semester.   Then compare and contrast representative members of the major marine animal phyla in terms of structure, adaptation, lifestyle, and evolutionary history. some organisms that we learned about this semester go from microscopic to the largest sea mammals known to man. 
a marine food web

• diatoms; They dominate the temperate and polar oceans. Typical size is about 30 micrometers. They contribute about 60 per cent of the primary productivity in the oceans. 
• The phytoplankton are eaten by the smallest floating animals, the zooplankton They range in size from single-celled organisms to larger multi-celled organisms. Small zooplankton are eaten by larger zooplankton. 

one mammal that i was very interested in would be whales, humpback and orca .i really enjoyed learning about these mammals. they really interested me because of the movie "Blackfish". after watching this movie i got a better under standing of how whales are living in the wild. 


niche 
Hutchinson's fundamental niche, defined by the physical and biological environments in which an organisms can thrive in the absence of inter-species interactions.

the phytoplankton and the plants plat a huge role in the marine food web. the plants underwater use photosynthesis and they make their own food. others are producers and other are consumers. 
http://www.ncbi.nlm.nih.gov/pubmed/22832347

HOT TURTLES

climate change

 Earth's average temperature has risen by 1.4°F over the past century, and is projected to rise another 2 to 11.5°F over the next hundred years. Small changes in the average temperature of the planet can translate to large and potentially dangerous shifts in climate and weather. Oceans are warming and becoming more acidic, ice caps are melting, and sea levels are rising

amazon turtles & What Can We Do?

amazon turtles are being killed everyday, the climate change is messing with their natural habitats. there isn't much we can do to help them, except have people on the beaches who supervise the turtle nests, and help them to the water and hope they survive. this effects all turtles around the world and everyone needs to take precautions to the situation.

turtles dig nests in the sand, and they lay their eggs at specific times during the year and usually at night.The length of the incubation period of turtle eggs depends on the species, but it is usually several weeks.The number of eggs a turtle lays also depends on the species, but can be up to 200.Turtle eggs have many predators, including small mammals, lizards, birds and humans.

MARINE WILD LIFE

1. What role does the marine wildlife and nature play in your life?

Marine wildlife plays a big role in my life by a primary food source, entertainment, such as resturantes, and going on whale watches and SeaWorld for example. i have never been to seaworld and most likely never will. their marine life is not wild anymore and have been captured and mentally and physically abused. 

2. How does the use of marine resources impact you on a personal level?

marine resources such as over fishing can effect me on a personal level by the fish increasingly going extinct, and the amount of money moving up. this can effect me by not being able to eat fish at a reasonable price or the fish going bad by stress, etc. 

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1. 3. Specifically, what new thoughts do you have about marine resources and the way they are used by people?

i think marine resources are a sick way of entertainment. if we were meant to keep the whales and other marine life in  cages they would have been that way. having these animals kept in captivity shows nothing but have ignorant human race can be. it is not fair and should not be this  way. 

AQUARIUM!

Before going to the aquarium all i thought of was how Ive been before and all you do is walk around look at fish and get bored after twenty minutes.But going in the aquarium Wednesday I thought it was going to be the same experience. After walking in i caught my self starring at one thing for a great amount of time. I really enjoyed everything about the aquarium and looking at all the colorful fish and really trying to understand how they live in their habitats and what they need for food sources. i especially enjoyed learning and looking at the sea dragons. they way they move around is just fascinating. they float and do not really have an specific directions to go in. Experiencing the aquarium when having to look, listen and learn about how the animals live under water. The most amazing part of the whole field trip, to me anyway, would definitely have to be the IMAXX theater and the movie. that movie was definitely  one of the most inspiring movies ive ever watched. i was amazed at how young this little boy was and watching him get to experience things in life that most people will never experience. i'm so thankful i got to experience what i did and hopefully get to share my knowledge with others.  

phytoplankton diversity

in each article, they each talk about  how phytoplankton play a major role in the food chain. due to the water becoming warmer the phytoplankton are decreasing by 40%. the  phytoplankton are decreasing and there is nothing to stop it. "The work addresses how phytoplankton species are affected by a changing environment, and the really difficult question of weather adaptation to these changes us possible. (Morello, Lauren, and ClimateWire. "Phytoplankton Population Drops 40 Percent Since 1950." Scientific American Global RSS. Scientific American, 29 July 2010. Web. 12 Feb. 2014.)