Science Exam Review 2009

JG (United States of America)
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Full list of words from this list:

words only definitions & notes
  1. asteroid
    a small celestial body composed of rock and metal
  2. extrusive
    forced while molten through cracks in the earth's surface
  3. hydrosphere
    the watery layer of the earth's surface
  4. lithosphere
    the solid part of the Earth
  5. allele
    any of the forms of a gene that can occupy the same locus
  6. cell theory
    (biology) the theory that cells form the fundamental structural and functional units of all living organisms; proposed in 1838 by Matthias Schleiden and by Theodor Schwann
  7. phenotype
    observable characteristics produced by genes and environment
  8. genotype
    the particular alleles present in an organism
  9. covalent bond
    a chemical bond that involves sharing a pair of electrons between atoms in a molecule
  10. ion
    a particle that is electrically charged positive or negative
  11. global warming
    a rise in the average temperature of the earth's atmosphere
  12. exothermic
    occurring or formed with the release of heat
  13. endothermic
    occurring or formed with absorption of heat
  14. chemical attraction
    the force attracting atoms to each other and binding them together in a molecule
  15. periodic table
    arrangement of chemical elements according to atomic number
  16. genetics
    the study of heredity and variation in organisms
  17. Newton's law
    one of three basic laws of classical mechanics
  18. solvent
    capable of meeting financial obligations
  19. space probe
    a rocket-propelled guided missile that can escape the earth's atmosphere; makes observations of the solar system that cannot be made by terrestrial observation
  20. microorganism
    any living thing that is too small to be seen with the naked eye
  21. protist
    free-living or colonial organisms with diverse nutritional and reproductive modes
  22. fungus
    a spore-producing organism that lacks chlorophyll
  23. bacteria
    single-celled organisms that can cause disease
  24. virus
    infectious agent that replicates itself within living hosts
  25. reflecting telescope
    optical telescope consisting of a large concave mirror that produces an image that is magnified by the eyepiece
  26. full moon
    the time when the Moon is fully illuminated
  27. metamorphic rock
    rock altered by pressure and heat
  28. radio telescope
    astronomical telescope that picks up electromagnetic radiations in the radio-frequency range from extraterrestrial sources
  29. refracting telescope
    optical telescope that has a large convex lens that produces an image that is viewed through the eyepiece
  30. biotic
    of or relating to living organisms
  31. asexual reproduction
    reproduction without the fusion of gametes
  32. cell membrane
    a thin membrane enclosing the cytoplasm of a cell
  33. flagellum
    a lash-like appendage used for locomotion
  34. diploid
    an organism or cell having the normal amount of DNA per cell
  35. gene
    part of DNA controlling physical characteristics and growth
  36. haploid
    (genetics) an organism or cell having only one complete set of chromosomes
  37. nucleus
    a part of the cell responsible for growth and reproduction
  38. organelle
    a specialized part of a cell; analogous to an organ
  39. population
    the people who inhabit a territory or state
  40. homologous
    similar in position, structure, function, or characteristics
  41. homozygous
    having identical alleles at corresponding chromosomal loci
  42. meiosis
    cell division that produces reproductive cells
  43. atomic number
    quantity of protons in the nucleus of an atom of an element
  44. atomic mass
    the property of an atom that causes it to have weight
  45. chemical bond
    an electrical force linking atoms
  46. chemical change
    process determined by substances' composition and structure
  47. chemical formula
    a representation of a substance using symbols for its constituent elements
  48. chemical property
    a property used to characterize materials in reactions that change their identity
  49. chemical reaction
    a process in which substances are changed into others
  50. electron
    an elementary particle with negative charge
  51. quark
    fundamental subatomic particle that has a fractional charge
  52. scientific method
    a systematic way of investigating to test a hypothesis
  53. hydrosphere
    the watery layer of the earth's surface
Created on Sun Jan 18 14:46:30 EST 2009

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