In the tundra, life forms are limited by the interaction of several of Earth's spheres. One sphere that interacts with both the geosphere, hydrosphere, and biosphere is the cryosphere. What is this sphere responsible for in the tundra?
A) poor, rocky soil
B) low growing plants
C) ground permafrost
D) mountainous terrain

Gusing the milligrams of ascorbic acid you entered above, the ratio of total sample volume to aliquot volume, and the total milligrams of the vitamin c tablet that you dissolved, calculate the mass of ascorbic acid in the vitamin c tablet for each trial. do this by scaling up to find the amount (mg) of ascorbic acid in your 250 ml flask. enter your calculated mass of ascorbic acid in the vitamin c tablet, for each trial. be sure to enter your calculated mass in the corresponding order that you entered your milligrams of ascorbic acid. the milligrams of ascorbic acid you entered for entry #1 previously should correspond to the mass of ascorbic acid that you enter for entry #1 here.