Which criteria do scientists consider when they classify soil? Check all that apply. soil profile
climate
soil composition
bedrock
soil horizon

Write the complete balanced equation for the reaction between lead (iv) oxide (pbo2) and water (h2o).

Ageologist determines that a sample of a mineral can't be scratched by a steel nail but can be scratched by a masonry drill bit. based on this information, the sample mineral has to be softer than a. orthoclase. b. fluorite. c. apatite. d. corundum.

Classify this reaction: 2al+n2-> aln.