Layer b in the diagram is located between the crust and core in terms of location, temperature, and pressure. what part of the earth is labeled layer b?
a) the core
b) the crust
c) the mantle
d) the atmosphere

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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.

The chart shows the bid provided by four contractors to complete a job. which contractor is the most cost-effective?