2. A rancher interested in the quality of the soil in her pasture might use which aspect of
soil as a quick indicator of the pasture's overall fertility?
a. Structure
b. Texture
с. рН
d. color

Compare and contrast physical changes with chemical changes.

Some liquids can be distilled, but only at temperatures that are so high that it is impractical, or so high the compound decomposes. explain why distillation such compounds at significantly less than atmospheric pressure (some degree of vacuum) would solve this problem.

What is a substance? a. a physical property of matter b. a chemical property of matter c. an element or compound that cannot be physically separated d. characteristics used to tell the difference between mixtures