<span>1. The references are not cited. Ie. It is unclear or unknown where the information came from.
2. The information is based on studies which are not peer-reviewed. Ie. The information has not been reviewed by experts in he field, or is not supported by a consensus of experts in the field.</span>
During diffusion the molecules move in constant random motion. <span>The </span>net movement<span> of a substance from a region where it has a higher concentration to a region where it has a lower concentration, due to random molecular motion, is called </span>diffusion<span>. Diffusion is a widespread and important process which occurs in both living and non-living systems. </span>
Answer:
Phobos
Phobos is nearing Mars at a rate of six feet (1.8 meters) every hundred years; at that rate, it will either crash into Mars in 50 million years or break up into a ring.
Explanation:
The answer is 100%. Three are observable, but the fourth is just a carrier.
