All changes saved 2. Answer the question below. Use the rubric in the materials for help if needed.
There is radiation all around you. Describe sources of natural radiation and sources of man-made radiation that you may
encounter. Use details to support your answer.

What does standard deviation reveal about data? a. the average of all the data points b. which of the data points is most reliable c. how spread out the data points are d. the percent error included in the data

The enthalpy of formation of water is -285.8 kj/mol. what can be inferred from this statement?

Pegmatites are igneous rocks in which the individual minerals are very large. typically, the minerals are all light-colored quartz, feldspar and muscovite. if you were given a black and white photograph of a pegmatite in a quarry (where the rock has been blasted and broken), what physical properties could you use to identify those three minerals in this hypothetical photo? describe each mineral and the specific diagnostic properties. be specific.