The making of abundant iron nuclei is typical of

A) planetary nebula ejection.
B) the helium flash.
C) all novae.
D) type I supernovae.
E) type II supernovae.


E

Physics & Space Science

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How is the sunspot cycle directly relevant to us here on Earth?

A) Coronal mass ejections and other activity associated with the sunspot cycle can disrupt radio communications and knock out sensitive electronic equipment. B) The sunspot cycle strongly influences Earth's weather. C) The Sun's magnetic field, which plays a major role in the sunspot cycle, affects compass needles that we use on Earth. D) The brightening and darkening of the Sun that occurs during the sunspot cycle affects plant photosynthesis here on Earth. E) The sunspot cycle is the cause of recent global warming.

Physics & Space Science

Which of the following colors has the shortest wavelength?

A. violet B. yellow C. green D. red E. blue

Physics & Space Science

During a solar eclipse, the ________ casts a small circular shadow on the ________.

A. Sun; Moon B. Earth; Moon C. Moon; Sun D. Moon; Earth E. Earth; Sun

Physics & Space Science

At apogee, the Moon is at its farthest from Earth and thus appears smaller than normal. Because of this it can produce only annular solar eclipses, but not total solar eclipses

Indicate whether the statement is true or false

Physics & Space Science