Sand sheets and dunes cover approximately 25 percent of the Sahara's surface.
Answer:
<u>says Earth was struck by a Mars-sized object and the debris coalesced into the Moon </u>
Explanation:
- The formation of the moon is highlighted by the Giant impact hypothesis or the big splash. It suggests that the moon has been formed out of the debris left by the collision of earth and the mars about 4.5 billion years ago.
- Thus earth and moon have similar orbital spins, moon samples indicate that surface was once molten rock, it has a relatively small iron core, and is if the lower density of the earth.
- In 1898 G.Darwin suggested that moon and earth were formed from the same rocks. Like it has been found that the debris continued to spin around the orbit of the planet and layer on accumulating to form the moon, which is suggested by the <u>debris coalescence hypothesis.</u>
Answer:
The answer is D
Explanation:
The answer is D because when I learned A couple of weeks ago before we started the American Revolution last week my social studies teacher said that indigo was a pigment for clothes for mercantilism.
Extinction may occur naturally as a result of a calamity, ongoing environmental stress, or ecological interactions like competition, sickness, or predation.
This occurs when a species' population gradually but steadily decreases at the conclusion of its time of development on Earth. Many North American mammals went extinct during the end of the last ice age, 10,000 years ago, including mammoths, mastodons, and glyptodonts. In addition to climatic change, overhunting by humans was another contributing cause, according to paleontologists' evidence. The phrase "extinction" refers to the end of a particular type of organism or a set of types, typically a species. Although the ability to reproduce and bounce back may have been lost earlier, the death of the last member of the species is typically considered to be the moment of extinction. Determining this point is challenging because a species' potential range may be quite wide, and is typically done after the fact. Due to this problem, there are phenomena like Lazarus taxa, in which a species that was thought to be extinct suddenly "reappears" after a period of apparent absence (usually in the fossil record).Estimates place the number of extinct species at over five billion, or more than 99% of all species that have ever existed on Earth. There are now about 8.7 million species of eukaryotes in the world, and if bacteria and other microbes are included, there may be many times more. Non-avian dinosaurs, saber-toothed cats, dodos, mammoths, ground sloths, thylacines, trilobites, and golden toads are a few notable extinct animal species.
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Unlike latitude lines<span>, </span>longitude lines<span> are not parallel. Meridians meet at the poles and are </span>widest<span> apart at the equator. Zero degrees </span>longitude<span> (0°) is called the prime meridian. The degrees of </span>longitude<span> run 180° east and 180° west from the prime meridian.</span>
