biology midterm

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biology midterm
2011-12-13 22:33:09
gork97 lmtrackstar

biology midterm setion 1
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  1. how do ethics apply to science?
    ethics are morals of science, you cant kill people for an experiment because that wouldnt be right. some thing ethical would be seeing how much sugar dissolves in water. to be ethical you have to be fair to the organism you are experimenting on.
  2. what is scientific thought?
    making observations, using evidence to draw conclusions, being sceptical about ideas, being open to change when new discoveries are made
  3. what are universal laws in science?
    something that can't be unproven
  4. is science useful
    it begins with observation and then leads to a question.
  5. how do scientific investigations begin?
    it begins with observation and then leads to a question.
  6. What are two types of experiments that scientists can use to test hypotheses?
    controlled experiments-tests one factor at a time and uses variables(things that change) and controls (things that stay the same, and what everything else is based on)
  7. what is the difference between a theory and a hypothesis?
    • theory:a general explanation for a broad range of things
    • hypothesis:is specific and is testable
  8. What are some of the branches of biology?
    biochemistry, ecology, cell biology, genetics, evolutionary theory, microbiology, botany, zoology, and physiology
  9. What are seven characteristics that all living things share?
    • cellular organization- basic organization in the cell
    • homeostasis- factors remaining the same (body temp, water level in your body)
    • metabolism- taking in organic compunds and putting others out
    • responsiveness- responding to your surroundings(moving out of the shade becuase it is cold)
    • reproduction- making more of yourself :)
    • heredity- passing traits to offspring
    • growth- growing
  10. what makes matter?
  11. what 3 types of particles make up matter?
    • electrons
    • protons
    • neutrons
  12. why do atoms form bonds?
    atoms are stable when they have 8 electrons, so if they dont they either share or take electrons from another atom
  13. what are the 2 types of bonds?
    • covalent: sharing (water)
    • ionic: taking (02)
  14. What makes water a unique substance?
    • Water has many unique properties that make it an important substance for life. Most of the unique properties of water result because water molecules form hydrogen bonds with each other.Ice floats.Water absorbs and retains heat.
    • Water molecules stick to each other.
  15. How does the presence of substances dissolved in water affect the properties of water?
    it affects waters boiling point, freezing, etc.