True or false:
hardness is a reliable identifier.

true

false

TRUE

Explanation:

Therefore, color alone is not reliable as a single identifying characteristic. Streak is the color of the mineral in powdered form. ... Because streak is a more accurate illustration of the mineral's color, streak is a more reliable property of minerals than color for identification.

tracks, burrows, eggshells, nests, tooth marks, or gastroliths

when the volume of gas is   changed from   717.73 ml   to 852 ml   the temperature will   change   from 315   c to 452   c

    calculation

this is calculated using the charles law formula

that is,   v1/t1 = v2/t2

          v1=?

        t1 = 315 c   into   kelvin = 315 +273 = 588 k

        v2 = 852   ml

        t2 = 425c + 273 =698 k

make v1   the subject of the formula ( by   multiplying both side by t1)

  v1=( v2 xt1) / t2

v1= (852 ml   x 588 k)/ 698 k= 717.73 ml