Answer: e. microscopic spherules and macroscopic meteor debris.
Explanation: Cosmogenous sediment is obtained from extraterrestrial sources, and it exists in two primary forms which are microscopic spherules and larger meteor debris. Microscopic spherules consists mostly of silica or iron and nickel, and are thought to be ejected. Macroscopic meteor debris is obtained from collisions of meteorites with Earth. These collisions release particles into the atmosphere these eventually settle back down to Earth and contribute to the sediments.
The air behind the front is cooler than the air it is replacing and the warm air is forced to rise, so it cools. As the cooler air cannot hold as much moisture as warm air, clouds form and rain occurs.
According to the Hubble law the more distant galaxies, the greater apparent recessional velocity. The Hubble law states that as the distance to galaxies increases, the apparent recessional velocity increases. The main equation is: <span>Recessional Velocity = </span>Hubble's constant<span> times distance</span><span>.</span>
