How is an occluded front different from a cold front? warm air is pushed up during an occluded front, while cold air moves quickly during a cold front. occluded fronts cause warm air to feel dry, while cold fronts cause ground temperatures to feel cooler. warm air moves slowly during an occluded front, while cold air is cut off from the ground in a cold front. occluded fronts cause rapid changes in weather conditions, while cold fronts cause widespread cloud formation

the dark variety, as they are not visible on the dark tree barks

explanation:

this age may represent the age of the earth's accretion, of core formation, or of the material from which the earth formed. this dating is based on evidence from radiometric age-dating of meteorite material and is consistent with the radiometric ages of the oldest-known terrestrial and lunar samples.

oxygen is the first element in group 16 (via) of the periodic table. the periodic table is a chart that shows how chemical elements are related to each other. the elements in group 16 are said to belong to the chalcogen family. other elements in this group include  sulfur, selenium, tellurium,  and  polonium.  the name chalcogen comes from the greek word  chalkos,  meaning "ore." the first two members of the family, oxygen and sulfur, are found in most ores.

oxygen is by far the most abundant element in the earth's crust. nearly half of all the atoms in the earth are oxygen atoms. oxygen also makes up about one-fifth of the earth's atmosphere. nearly 90 percent of the weight of the oceans is due to oxygen. in addition, oxygen is thought to be the third most abundant element in the universe and in the solar system.