Science 8 Final 2

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Science 8 Final 2
2013-05-27 20:53:34

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  1. the rate at which velocity changes
  2. What happens when 2 forces act in the same direction?
    add together
  3. Which group contains the most elements
  4. Atomic number is the number of
  5. The elements in a row of the periodic table
  6. The classes of organic compounds found in all living things are
    carbohydrates, lipids, proteins and nucleic acids
  7. Ionic bond is attraction between
    2 oppositely charged ion. Forms as a result of the attraction between positive and negative ions
  8. The elements in a column of the periodic table
    have similar characteristics
  9. Carbon is able to bond with atoms of other elements in many different ways because
    it has 4 valance electrons
  10. 2 most common alkali earth metals
    magnesium and calcium
  11. Number of protons equals number of _________
  12. Most metals are NOT
    liquid at room temperature!
  13. In the periodic table the most reactive metals are
    • at the far left, they decrease as they go across and down
    • alkali metals
  14. which group of elements shares characteristics of metals and nonmetals
    transition metals
  15. fluorine chlorine bromine iodine belong to which family
  16. Which elements do not normally form compounds with other elements?
    noble gases
  17. in water bases form
    Hydroxide ions (OH -)
  18. what does a neutralization reaction produce
    a salt and water HCl + NaOH --> H2O +NaCl
  19. the measure of how much matter an object contains is it
  20. Work is measured in
  21. in a lab, volumes of liquid are usually measured with a
    graduated cylinder
  22. Which particles in an atom are in the nucleus
    proton and neutrons
  23. The sun is made up mostly of
  24. What is the change from liquid to solid,or the reverse of melting called?
  25. In which state of matter that the particles spread apart and fill the space available to them?
  26. in a series circuit with three bulbs what happens when you add another bulb?
    They all become dimmer
  27. numbers in front of a chemical formula tell you
    how many of that molecule are in the formula
  28. the achievement of lifting a rocket off the ground can be explained by
    Newtons third law
  29. a disturbance that transfers energy from place to place is called
    a wave
  30. What form of carbon is so hard it could be used for cutting tools?
  31. periodic table - what indicates number of protons
    atomic number
  32. highest part transverse wave is called
  33. Speed equals distance divided by what?
  34. the speed of a wave is its wavelength divided by
  35. which part of atom moves around nucleus
  36. the maximum distance the particles of a medium move away from their rest positions
  37. Anything that has mass and takes up space is called
  38. when an atom loses an electron it becomes
    positive ion
  39. ramp is an example of
    inclined plane
  40. law of universal gravitation states that any two objects in the universe without exception
    • there is the force of attraction between them which is called
    • gravitation force that is always directly propotion to the masses and
    • indirectly proportion to the squre of the distance between them.
  41. The force of gravity on a person or object at the surface of a planet is known as
  42. Parallel circuit
    • Current can flow through each of
    • the bulbs without first having to flow through any others.
    • If any of the bulbs fail the others will still
    • work as current can still flow through the rest of the circuit.