Sugar dissolves completely in water. The solubility of a substance in water is determined by measuring the maximum amount of the substance that dissolves in a given amount of water at a
given temperature.
Hypothesis: The solubility of sugar in water decreases as the temperature decreases.
Identify the independent and dependent variables that you would use to test this hypothesis.
a. IV- temperature of water, DV- volume of water
b. IV-mineral content of the water, DV- temperature of the water
c. IV- solubility of sugar in water, DV temperature of vwater
d. IV- temperature of water, DV- Solubility of sugar

The statement is False.

Precambrian Time spans from about 4.6 billion years ago to about 540 million years ago. Fossils of some bacteria and cyanobacteria are an evidence that the life existed in Precambrian Time. They were the first organism that showed about 3.5 billion years ago. These unicellular organisms lived in the oceans. The first multicellular organisms evolved many years later, around 700 million years ago. Some fossils suggest the presence of some jellyfishes and worm-like forms that lived in the oceans. The land was not settled in the Precambrian time.