1. Stars in an open cluster are A. all about the same age B. about the same mass

Question

1. Stars in an open cluster are

A. all about the same age B. about the same mass C. about the same age and same mass D. of far different ages and masses

2. As stars evolve, they move on the H-R diagram. This means that they

A. move across the celestial sphere B. change in brightness, but not in temperature C. change in temperature, but not in brightness D. change in brightness and/or temperature

3. Most of the complex molecules detected in space were identified by their

A. visible spectrum B. radio emissions C. ultraviolet radiation D. gamma radiation

4. As light passes through the interstellar medium, it

A. becomes brighter B. becomes more blue in color C. becomes more red in color D. causes an effect that cannot be distinguished from the Doppler effect

5. The contraction of an interstellar cloud to become a star is caused by

A. magnetic forces B. electric forces C. nuclear forces D. gravitational forces

Explanation / Answer

1.A

2.D

3.B

4.C

5.D

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