Science 30-39

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Author:
torpadilla
ID:
124037
Filename:
Science 30-39
Updated:
2011-12-16 00:22:51
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Science
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Description:
30-39
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  1. Calcluate density:a piece of sold metal has a mass of 43.5g and a volume of 15cm3. What is the density of the metal.
    m/v 43.5g/15cm3 = 2.9g/cm3
  2. describe a gas in terms of shape and particle movement
    gas takes the shape of the holder, moves freely - air
  3. describe a liquid in terms of shape and particle movement
    liquid stays the shape of the holder, moves freely - water
  4. describe a solid in terms of shape and particle movement
    definate shape of volume, vibrates in place - block
  5. describe the law of conservation of mass
    the fact that matter is not created nor destroyed in any chemical or physical change
  6. describe the relationship between temperature and thermal energy
    the higher the temperature of an object, the higher its thermal energy
  7. How do you know if something was chemically changed?
    • - colors all change
    • - heat and temperature change
    • - ex. combustion
  8. how do you know if something was physically changed?
    same substance, different form
  9. put the layers in order: which would be on the top, middle and bottom?a. 1g/mLb. 4.2 g/mLc. 0.57 g/mL
    • top: 0.57g/mL
    • middle: 1g/mL
    • bottom: 4.2g/mL
  10. what are 3 states of matter
    • - solid
    • - liquid
    • - gas

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