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Biolgy Final Exam help

  1. Dec 17, 2006 #1
    1. The problem statement, all variables and given/known data



    2. Relevant equations



    3. The attempt at a solution

    Im not sure how to use the above posts but please post back if it is okay for me to post my study guide so that yall can please help me i have it typed and my bio teacher said that he was not going over the correct answeres so i need youe help cause i really needto pass this test. i have a few of them answered and have tryed to find many but i need some help my Exam is tuesday so if i could get help before then that would be great.
     
  2. jcsd
  3. Dec 17, 2006 #2

    cristo

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    Post the questions, and give as many answers/thoughts you've have about particular ways of answering the questions. We can try and tell you where you've gone wrong (if at all) and give hints for questions you're completely stuck on.
     
  4. Dec 17, 2006 #3
    ok thanx.
    1) What are the stages of the scientific method? 1.Observe 2. Make a hypothesis 3. Collect Data 4. Publish Results 5. Form a theory 6. Develop a new hypothesis 7. Revise theory
    2) What occurs during each stage of the scientific method?Couldn't find an answer for this one
    3) What are the important safety rules for the science classrooms? Always follow directions, and wear safety equipment
    4) What is the standard unit of measure in science called? SI units
    5) What are the standard units for Length, Weight, Mass, Area, Volume, Density, Time, and Temperature? Length- Meters...Weight-Pounds...and those are the only units for that ive found so far
    ill let you read over these before i post the other ones cause i sorta have a lot more to go if thats ok
     
  5. Dec 17, 2006 #4
    6) How do scientists communicate? No Answer
    7) What are reports, graphs, models, theories, and laws? No Answer
    8) Differentiate between a theory and a law? A Law is something proven to be true, a theory is a given thought expressed by a person, believed to be true.
    9) What tools are used to measure in the SI system? No Answer
    10) What is an atom? Is the smallest particle of an element that has the characteristics of that element
    11) What makes up an atom? The center of the atom (nucleus), nuclei contain positively chraged protons (P+), most contain nuetrons, have no charge (N*), then the region of space surrounding the nucleus contains negatively charged electrons (N-)
    12) What are elements? Substances that cant be broken down into smaller substances.
     
  6. Dec 17, 2006 #5

    cristo

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    sounds fine to me.
    I'd say this was pretty self explanatory (if I'm reading the question correctly) for example, what happens in the "observation" stage
    sounds good
    correct
    length is correct. pounds are a unit of mass, not weight (however, pounds are not the SI unit of mass!) I'll tell you that the SI unit of mass is kilogram.
    For area: the units of area will be the units of length x length.. can you take a guess? Similar technique for volume. I'll leave the rest for you to find (time should be easy.. what units do you use to measure time in the lab?)

    That's fine, as long as you've made an attempt at them!
     
  7. Dec 17, 2006 #6

    cristo

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    Not sure what the question wants as the answer here!
    Come on, you can have a go at this surely!
    That sounds good
    Again, the question is a bit ambiguous here, so I'm not sure what the answer is. Standard SI apparatus, maybe? (that's a guess!)
    correct
    All nuclei contain neutrons. Also, I'd use N for a neutron, and e- for an electron, otherwise, that's correct
    correct
     
  8. Dec 17, 2006 #7
    13) Differentiate between protons, neutrons, and electrons. Protons-are positively charged, Electrons- are negatively charged, and Neutrons- have no charge
    14) What are the different types of electrons? (hint orbitals) thats how its writin but i cant find anything but this about it.......Hydrogen Atom- has one electron Oxygen Atom- has 8 electrons
    15) What is an atomic mass? No Answer
    16) What are compounds? Its a substance that is composed of atoms of two or more different elements that are chemically combined.
    17) Differentiate between molecules and atoms. MOLECULE- is a group of atoms held together by covalent bonds.
    ATOM- Smallest part of an element, atoms are much smaller that moleculs
    18) What are ions? Charged particles made of atoms
    19) What are ionic and covalent bonds? IONIC- the attractive force between 2 ions at opposite charge COVALENT- when 2 atoms share electrons, such as 2 hydrogen atoms shareing electrons, the force between holds them together
    20) What are the states of matter? No Answer
     
  9. Dec 17, 2006 #8

    cristo

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    #13 is fine, but consider masses as well. This will enable you to answer #15. For #18, be more specific, for example how do atoms become charged when they form ions? For#20, think of the different types of matter you've come across- they will fit into three categories (eg, what state is water?)
     
  10. Dec 17, 2006 #9
    ok thank you i have to go but i will be back tommorrow after i answer more...thanx
     
  11. Dec 21, 2006 #10

    ibo

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    Don't forget the 4th state of matter, plasma - the most abundant substance in the universe.
     
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