a week than a day
The Jurassic era, which lasted from approximately 201 to 145 million years ago, is characterized by the dominance of dinosaurs. In the middle of the Jurassic period, the Tithonian epoch saw the evolution of larger predators like Allosaurus and Stegosaurus.
Much, MUCH smaller than the smallest star.
Yes, the Sun is much smaller than Betelgeuse.
The planets appear smaller than the sun because they are much smaller in size compared to the sun. Even though they may be further away, it is primarily their smaller size that makes them look smaller in the sky.
Ganymede is largerthan Mercury, but has a smaller mass.
An epoch is smaller than an era or a period.
A period is smaller than an era in the geologic time scale. It is further subdivided into epochs and ages.
An era is a time period of indeterminate length, or, geologically speaking, a unit of time, smaller than aeons and greater than periods.
After an era, the next smallest division of time would be an epoch. An epoch is equal to around 10,000,000 years, where as an era is 100,000,000 years.
On the geologic time scale, an era is longer than a period. There are 12 geologic eras in total and they are composed of geologic periods. For instance, the Mesozoic era is composed of the Triassic, Jurassic and Cretaceous periods.
No, a geologic era is a longer unit of time than a geologic period. Geologic eras are divided into periods, which are further subdivided into epochs. The hierarchy from largest to smallest is era, period, epoch.
A Period
False
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In geological time a period is smaller than an era but larger than a Epoch.The International Commission of Stratigraphic have divided the time as such from largest to smallest.Super-Eon - (SuperEonothem) (Not recognised by the ICS but unofficially recognised e.g. Precambrian time)Eon - (Eonothem)Era - (Erathem)Period - (System)Subperiod - (SubSystem)Epoch - (Series)Age - (Stage)Chron - (Chronozone) (Not recognised by the ICS but is unofficially recognised usually based on reversal of earths magnetic field)
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An eon is the largest division of geologic time, lasting billions of years. An era is a subdivision of an eon, typically lasting hundreds of millions of years. A period is a smaller division of geologic time, lasting millions of years, and an epoch is an even smaller division of time, typically lasting tens of millions of years.