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What evidence have scientists found to show that there were ice ages in the past?
Wiki User
∙ 16y ago
Most evidence of ice is for the last glaciation as it obliterated the evidence of previous glaciations.
Most of Britain was covered in ice although it stopped to the north of London. The evidence is found in the large areas of glacial till, (loose sediment with lots of different sizes and types of stones without any sorting into layers), striations on smooth outcrops of rock caused by ice grinding over it and erratics, (boulders from other parts of the country left isolated in areas where they would not normally be found). Also "U" shaped valleys carved by glaciers and ice-dammed lakes now only shown by former shorelines along valleys.
Wiki User
∙ 13y ago
Wiki User
∙ 16y agoIce cores help us see what the temperature used to be like milllions of years ago so using them now we can predict what the temperature will be like in the future.
Wiki User
∙ 15y agoThey think that earth fills up on gases which block the sun's rays and lower the temp.
Wiki User
∙ 14y agolayers of glacial till deposited on top of each other.
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Is there evidence of past life on mars?
Scientist have found what looks to be a place were there was once water so there is a big possibility.
What evidence does fossils found in sedimentary rocks provide?
It can provide evidence of the environment the area was in in the past. For example, if you found a fossil with tentacles, you could guarantee that it is a marine creature (as tentacles are useless on land). You can then go on to imply that the rock was also formed in a marine environment. An example is shale, which is formed in a tranquil marine environment. This gives evidence of the past environment and also climate. Coal is also a fossil. A coal seam is sure evidence of a warm climate and a deltaic/marshy landscape.
Why must scientists be careful with the evidence they find?
Because all of our knowledge of the past is based of of their evidence and damaging anything not only is equivalent to the loss of hundreds of millions of dollars, it is also a irretrievable loss of knowledge. Furthermore, carelessness may result in misinterpretation of the evidence and/or contamination of the evidence which is even worse than loss, as it may cause incorrect conclusions to be drawn.
Can scientists use soil to help determine past climates?
True
Why should scientists with theories regarding the unobsreved past claim them as fact?
They shouldn't.
What can living organisms provide evidence about the past?
Scientists can see th fossils and the living organisms.
Why do scientists refuse to believe aliens have visited our planet in the past?
Because there is no credible evidence to indicate they have.
Is it true or false the Scientists accept ideas from the past but will revise them when new evidence is discovered?
true
What is the difference in primary and secondary evidence?
the difference is that Primary evidence is took from that moment and secondary is a piece of evidence found from the past.
How is studying the past part of biology?
Most scientists that contributed to biology were of the past, and the only evidence of evolution is in the past. History is a completely different aspect, though, and has little to do with biology.
What can geologists learn about the interior of Earth from rock samples?
Because is gives evidence for the Scientists that want to know more about the past. :)
: which of the following would not be considered a non-traditional sport apex?
what are two ways scientists use evidence of past environments preserved in rock?
Today glaciers are found on all continents?
Australia has no glaciers currently, though it had some in past ages.
What do you call scientists that learn about the past?
Scientists that learn about the past are called historians because they learn about history/past.
How have scientists worked together in the past?
Scientists have worked together in many ways in the past.
Why do micro organisims survive on mars?
We don't know that they do. Evidence of running water some time in the past has been found on the surface of Mars, but as yet no direct evidence of the past or present existence of micro-organisms.
How are fossils used to helps understand the history of earth?
Scientists can use fossils to learn about what happened about what Earth was like in the past. A fossil is any evidence A fossil is any evidence that life once existed in a place.
