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What causes diamonds in Africa?
All diamonds are formed deep within the earth's mantle and are erupted to the surface by way of volcanic pipes. Diamonds are found on every continent except Europe and Antarctica. That there are diamonds in Africa is simply part of the earth's composition and geological evolution.
Which part of the Earth is solid?
Everything in the earth is solid. But earth is not spherical. The earth has large holes that makes up the oceans.
When did plant life begin to appear on Earth?
Plants have been around on the Earth since the Cambrian part of the Palenzonic Era.
What part of the earth is believed to be solid iron and nickel?
The inner core.
What determines day and night?
The earth spinning on its axisThe rotation of the earth. Sometimes you're part of the earth is pointed towards the sun, other times it's pointed away from the sun.Earth's rotation on its axis.
Is the Precambrian time the longest or shortest part of Earth's history?
The Precambrian time period is the longest time period of Earth's history.Looks like we have the same worksheet in school :)
What part of Canada was created during the Precambrian era?
the Canadian shield
Why wasn't uranium formed when the earth was formed?
Uranium is formed by nuclear synthesis in supernovas and at the 'big bang'. When the earth formed Uranium became a part of the forming earth.
Did earth just appear?
No, it was formed as part of the collapse of the Nebular which formed the Sun.
What age is Archean?
the eon that constitutes the earlier (or middle) part of the Precambrian, in which there was no life on earth. It precedes the Proterozoic eon. Also called azoic .
What animal first appeared during the precambrian era?
As far as we know for the majority of the Precambrian super-eon the only life on earth was bacteria.At the very end of the Precambrian multicelled life evolved. Amonst them jellyfish, invertibrates, sponges and pretty much a prehistoric version of most sealife today. There is also very suggestive evidence for simple plant life in the form of green algae in the Precambrian.
Which era spans the greatest number of years in earths geological history?
The pre-Cambrian period which is a little over 630 million years ago. Before this era, there were no biota which leave a decent fossil impression - mainly soft-bodied forms. But see Ediacara in Wikipedia for more information.The earth by comparison is about 4.5 billion years since formation in roughly its present form. [So 630/4.5 000 ]
How long did the PreCambrian era last?
The Precambrian Era. The name means: "before the Cambrian period." This old, but still common term was originally used to refer to the whole period of earth's history before the formation of the oldest rocks with recognizable fossils in them. In the last few decades, however, geologists have found that there are some hard-to-discern fossils in some Precambrian rocks, so this period is now also known as the Cryptozoic or "obscure life" Eon (from the words "crypt" = "hidden," and "zoon" = "life"). The Precambrian covers almost 90% of the entire history of the Earth. It has been divided into three eras: the Hadean, the Archean and the Proterozoic. Source: Unknown The Precambrian Era comprises all of geologic time prior to 600 million years ago. The Precambrian was originally defined as the era that predated the emergence of life in the Cambrian Period. It is now known, however, that life on Earth began by the early Archean and that fossilized organisms became more and more abundant throughout Precambrian time. The two major subdivisions of the last part of the Precambrian are the Archean (oldest) and the Proterozoic. Rocks younger than 600 Ma are considered part of the Phanerozoic.
In which part of the earth are diamonds most often formed?
the mantle and the crust, in the lithosphere.
Why is the water part of the earth higher during spring tide?
yes because the water is part of the earth
What is summerwood?
It is part of an annual ring of wood, formed during the latter part of the growing season
Are deserts a part of the earth's environment?
Yes, deserts are a natural part of the earth's environment. They are formed by particular geographic factors that limit rainfall to particular areas.
