Water Unit Study Guide, pt. 2

15. Corrected version: H = 4 cm, L = 6cm, w = 2 cm
   A (top)= L      x     W
   A        = 6 cm x  2 cm= 12 cm²
    V =   L      x     W    x   H
    V = 6 cm x  2 cm    x   4cm = 48 cm³
D = m/v  (where mas sis given as 24 g)
   =  24g/48 cm³ = ____ g/cm³          

16. water            

                                 ^oF          ^oC

           melts at:   32            0
           boils at:    212         100

17. Elements vs. Compounds: 

Element:

•        consists of only one kind of atom,
•        cannot be broken down into a simpler type of matter, and
•        can exist as either atoms (e.g. argon) or molecules (e.g., nitrogen).

 Compound:

•        consists of atoms of two or more different elements bonded (bound) together,
•        can be broken down into a simpler type of matter (elements) by chemical means (but not by physical means),
•        has properties that are different from its component elements, and
•         always contains the same ratio of its component atoms.

Both: made up of atoms