Astronomers Can Tell Whether a Star Is Approaching or Receding

question 59

Multiple Choice

Astronomers can tell whether a star is approaching or receding from earth by

• A) the Doppler effect.
• B) its temperature.
• C) its change in temperature.
• D) its absorption spectra.
• E) all of these

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Definitions:

Columnar Cell

A type of epithelial cell that is taller than it is wide, often found lining organs such as the intestine, where it aids in absorption and secretion.

Prevent Water Loss

Mechanisms or behaviors that organisms deploy to retain moisture and avoid dehydration.

Keratinized Stratified Squamous Epithelium

This refers to a type of tissue composed of multiple layers of cells, with the outer layers being hardened by keratin, providing protection against abrasion, dehydration, and infection.

Nonkeratinized Stratified Squamous Epithelium

A type of epithelium consisting of multiple layers of cells, found in moist areas of the body where protection against friction is required, without the surface layer of keratin.