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A 58-year-old gardener comes to your office for evaluation of a new lesion on her upper chest. The lesion appears to be “stuck on” and is oval, brown, and slightly elevated with a flat surface. It has a rough, wartlike texture on palpation. Based on this description, what is your most likely diagnosis?

What do the observed spectral lines reveal about the source?  

What is the name of the unique pattern that appears when the light from a star is absorbed by certain elements present in the star?

Which of the following objects is not a part of our solar system?

Which space technology is currently the largest spacecraft ever built, and was even partly assembled in space?

The galaxies we find farthest away from the Milky Way are also probably the _____ in the universe.

23. _______________ is composed of two or more substances.

36. Chemistry is the study of matter and the origin of mass.

13. Oxides are formed during _______________________.

16. Color, odor, taste are example of what type of properties: