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How long is a geological period?
Since the paleozoic the Cretaceous and Carboniferous periods were the longest, each about 80 million years. The Neogene (Cenozoic period preceding the current Quaternary period) was only 22 million years. Periods are marked by significant climate or environmental change, including mass extinctions and the proliferation of new species. Everything before the Vendian is lumped into the Proterozoic period, extending back about 1.9 billion years. Geologists may divide that up further as they determine periods of significant change recorded in ancient rock.
What group number and periods are halogens in?
All halogens are in the group 17 of the periodic table. Periods: fluorine in the period 2, chlorine in the period 3, bromine in the period 4, iodine in the period 5, astatine in the period 6, ununseptium in the period 7.
The horizontal rows on the periodic table are called?
The horizontal rows are called periods
Which era has the most periods?
victorian england period
What period is radon in?
It is period 6, group 18. Periods are vertical, groups are horizontal
Which pattern of evolution is characterized by long period of stability interrupted by brief periods of significant physiological change?
Punctuated equilibrium.
How did the architecture of this period change from previous periods?
it change by the age..
What is the concept that evolution occurs over long period of stability that are interrupted by geologically brief periods of change known as?
This concept is known as Punctuated Equilibrium. A theory developed by Steven J Gould and Niles Eldridge.
Can fingering yourself make your period start?
No, periods are controlled by hormones and masturbation will not change that.
When do little girls have their period?
Girls all have their periods at different times it just depends of the girl.
Your period was 3 days late but you started your period are you pregnant?
No, you are not pregnant. Sometimes Periods are just a little irregular, it is normal though.
Can Menopause change periods?
Yes Menopause can change the period .Menopause is defined as the time when there has been no menstrual periods for 12 consecutive months and no other biological or physiological cause can be identified.
The qin dynasty divided into two periods because?
The Zhou Emperor could do little to hold his fractious empire together, and was little more than a figurehead with the post but no real power. Because of this the dynasty was split into two periods, the spring and autumn period, and the warring states period.
Are There are 6 periods in the Mesozoic Era?
There were three periods in the Mesozoic Era. The Triassic Period, the Jurassic period & the Cretaceous Period.
How can you make your period regular?
I'm no doctor but really you can't make your period regular. All periods are different for all girls. Some girls cramp, some don't, some girls have irregular periods, some don't. Your period is your period and trying to change it probably wont do much.
Do squirrels eat their own periods?
squirrels always eat their own period. they find it very yummy, they always sit in their little squirrel houses, eating their little squirrel period from little squirrel bowls. They always call their little squirrel cousins and ask them round to their house to see if they want to watch. While their at it they eat each other out. Of course squirrels dont eat their period, i dont even think squirrels have periods.
