Gallery of Volcanic Rocks. Photo (c) Andrew Alden, licensed to About.com (fair use policy) Igneous rocks -- those which originate from magma -- fall into two categories: Extrusive and intrusive. Extrusive rocks erupt from volcanoes or seafloor fissures, or they freeze at shallow depths. This means that they cool relatively quickly and under low pressures, therefore they are typically fine grained and gassy.
on average it takes the human body approximately two to three hours to excrete a liter of water through the bladder this is dependent on several factors including the absorption of water the components in the water if dehydration is present the time of day and the general health of the person continue reading
Steps. 1  1. Check if you are having a transabdominal (full bladder) exam or an endovaginal/intravaginal (empty bladder) exam. 2  2. Realize that everyone's kidneys produce urine at a different rate, so the instructions given to you by the clinic are aimed at the patient with the slowest bladder filling time.