Dust in Galaxies Does Not Count as Dark Matter Because

question 83

Multiple Choice

Dust in galaxies does not count as dark matter because:

• A) it only absorbs some wavelengths of light but not all wavelengths the way dark matter does
• B) it interacts with light
• C) it is only found in spiral disks, whereas dark matter is more widely distributed
• D) dust is easily destroyed by dark matter
• E) there is never enough to make all the gravity

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Definitions:

Stereoisomer

Molecules that have the same molecular formula and sequence of bonded atoms but differ in the three-dimensional orientations of their atoms in space.

Drug Receptors

Specific molecular sites within the body that drugs interact with to produce a pharmacological effect.

Most Polar Molecule

The molecule with the highest difference in electronegativity between its atoms, leading to a significant dipole moment.

Methanol

A simple alcohol with the formula CH3OH, used as a solvent, antifreeze, fuel, and as a precursor for various chemicals.