dnt try the answer C. because its not... the answer is B. they have short lifetimes
There is no definitive answer to whether Earth will lose its magnetic field in the future. Scientists believe that the magnetic field has weakened and shifted in the past, but it is uncertain if it will disappear completely.
The exact time of the Earth's end is uncertain. However, scientists predict that in about 5 billion years, the Sun will exhaust its fuel and expand into a red giant, likely engulfing and destroying the Earth. This process will mark the end of the planet's habitable conditions for life.
Long-range earthquake forecasts are based on historical seismic data, geological observations, and models that analyze patterns and probabilities of seismic activity in specific regions. Scientists use these tools to assess the likelihood of earthquake occurrence over longer time frames, but note that such forecasts are inherently uncertain due to the complexity of tectonic processes.
The inner transitional metals contain 2 main groups, the lanthanide series, and the actinide series (f block elements). The lanthanide series include the 14 elements that proceed lanthanum (atomic number 57) from atomic numbers 58 to 71. Their electron configuration include the 4f and 5d energy levels. Because of the closeness of those two levels, there is considerable uncertainty in some electron configuration assignments. The actinide series include the 14 elements that proceed actinium (atomic number 89) from atomic numbers 90 to 103. The electron configurations of the actinides are even more uncertain than the lanthanides because the closeness of the energy levels and because the nuclei are unstable to radioactive decay. Only minute amounts of some elements are obtained because of their instability. All of the actinides are unstable with respect to alpha emission. The later members tend to undergo spontaneous fission, a fact which limits the number of elements possible.
There is no definitive answer as to when the next ice age will occur. Climate scientists suggest it may be delayed or prevented entirely due to human-induced global warming. However, natural climate cycles could potentially trigger an ice age in the distant future, but predicting its exact timing is uncertain.
Scientists are uncertain about the electronic structure of the Actinides because they have short lifespans. Some of the actinides have such short half lives that it is impossible to figure out their exact chemistry.
They have such short lifetimes
Uncertain, but sometime in the early 1950s when an off the shelf electronic analog computer was interfaced to an electronic digital computer.
Scientists n there theories are uncertain still of how the moon formed about'
Scientists actually are uncertain whether fish actually feel pain or not.
I was uncertain about whose voice it was.He was uncertain about the results.
an uncertain man's relationship would b jus as uncertain as he is...
Uncertain etiology means the cause is unknown.
He felt uncertain about the future.
I am uncertain how to use a dictionary.
THE ANSWER IS UNSURE. THIS IS ONE OF MANY SYNONYMS OF UNCERTAIN.
antonym: uncertain, unsure