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1.   The lava output from the volcano in crater park has quadrupled over the past 30 days. If the lava output 30 days ago was 2 tons of rock per week, what is the output now?

2.   * This is a pre-made sheet.
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3.   A core sample from the town square was drilled and collected by Z-Globe. Analysis revealed alternating layers of clay and volcanic shale. Each layer of shale was only about 1/5 as thick as a layer of clay. If the total sample was 80 feet in thickness, what was the approximate clay to shale thickness ratio?

4.   Hornblende is a dark mineral found in many igneous rocks. It has the general chemical formula Ca2Al2Mg2Fe3Si6O22(OH)2. If in a particular crystal of hornblende there are 2.5 million iron atoms, how many aluminum atoms should there be? Round your answer to the nearest hundredth.

5.   Based on what has been found so far, the ratio of fossil floopasaurs to fossil bloopia in Africa is 5 to 1. If this ratio is later discovered to have an error of 50% (too high) for floopasaurs, what would the corrected ratio be?

6.   A soil sample from near a factory is analyzed to see if it is polluted. In one test, 19 g of soil was dried to remove water. After drying, 70% of the original mass remained. An elemental analysis was performed and the soil was found to be 27% carbon, 24% oxygen, 13% hydrogen, and the rest was ash. Ash contains minerals and other difficult to decompose matter. Assuming all the ash was the result of soil minerals, how many grams of minerals was in the original soil sample? Round your answer to the nearest hundredth.


 


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