Tertiary is a specialized level of health care that include diagnosis and treatment of diseases anddisabilities. Tertiary care is what takes place in intensive care units and emergency rooms.
Health related fitness is excercising to get healthy and performance related fitness is excercising to for like strength and to do well in sports
The "eight glasses a day" rule presumes 8-oz glasses:
8 x 8 = 64 oz = 2 quarts
1 quart = 946 ml x 2 = 1892 ml
So you should drink 3.784 of those 500ml bottles of water.
Looked at another way, each of those 8oz glasses of water holds 236.5 ml, so if you drink all four 500ml bottles of water, you're drinking a little more than 8 1/2 glasses of water.
Looked at a third way, if you measure an extra half-ounce of water into each of your eight glasses, you're up to four 500ml bottles.