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there would be new kinds of animals
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∙ 12y ago
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How many million years ago was there a sign of animal life?
there was animal life 4.8 million years ago
When did animal life begin in the oceans?
According to the latest evidence, between 700 and 600 million years ago.
What Era is Cambrian?
It is the era which occurred about 550 million years ago when animal life exploded onto the scene, here on planet Earth.
Uranium-235 has a half life of?
The half-life is 700 million years !
How long will the ground in hiroshima and nagasaki be contaminated?
Nagasaki would be contaminated for about 703.8 Million years as that is the half life for Uranium 235. Hiroshima would be contaminated for 24,100 years as that is the half life for Plutonium 239.
Piranha life span?
a piranha can live 7-10 years depending on how well the animal is taken care of
How long would it take to populate the earth?
It took 4600 million years to populate the earth with the life we have on it today.
The half life of uranium 235 is 700 million years After 1.4 billion or 1 400 million years what fraction of the original amount of uranium 235 remains?
A half life pertains to the time it takes for exactly half of a substance to disappear. So, if U235 has a half life of 700 million years, it will take 700 million years for half of it to decay. That would leave .5kg or 500g.
What is a backswimmers life span?
100 million years
When did life get started?
About 3800 million years ago.
What is the life expectancy of life of a star?
A 16.0 solar mass star would spend about 11.7 million years on the main sequence (depending on the metallicity). After approximately 13.0 million years it would become a 1.5 solar mass (approx.) neutron star. This was calculated using metallicity z=0.02 (solar)
If a substance has. A half-life of 5 million years what fraction of the atoms remain after ten million years?
A quarter remains.
