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The head of the femur rests in the ________________ to form the hip joint.

_______ bone is found at the ends of long bones as well as the center of most other bones.

Select the correct statements concerning the parts of long bones as they relate to their key function. (select the two (2) correct answer)

Many economists believe that the trend toward greater wage inequality across the U.S. economy was primarily caused by ___________________.

Which of the star clusters appears to be the oldest?

Explain the difference between a star going through interstellar reddening and a star that is redshifted. To do this, comment on the following: a.) What is causing the reddening and redshift? b.) How would the absorption spectrum for the stars differ? Comment both on the position of the spectral lines and their strength (how bright each line appears to be).

Match the various luminosity classes with the phases of our Sun’s lifetime. Note: not all answer choices will be used.

Which of the star clusters appears to be the youngest?

The stars denoted by the circled region “C” are higher on the the diagram than those labeled “D” since they are ________.

Which of the star clusters does not contain any protostars?