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How do scientist determine when an era begins and when it ends?
rocks and fossils
How do scientists determine when one era ends?
Scientists determine when one era ends by looking at significant geological, climatic, or biological events that mark a distinct change in the earth's history. These events are usually reflected in the rock record or fossil record and help to establish boundaries between different geological eras.
How do you know when an era ends?
a big event like a massive extinction ends an era.
Who was the most famous scientist of the Hellenistic era?
The famous scientist of the Hellenistic era was Archimedes.
What two events do historians use to mark the end of the Hellenistic Era?
The Hellenistic period begins in 323 with the death of Alexander the Great and ends with the battle of Actio in 31 BC
What era is when life begins?
Precambrian
What do scientist observe most?
Scientists observe a wide range of phenomena depending on their field of study, but common things they may observe include changes in temperature, patterns in data, behavior of organisms, chemical reactions, and the effects of certain stimuli on their subjects. The goal of these observations is to gather data and draw conclusions that help further our understanding of the natural world.
How do you determine the end of an era?
It was science that named and decided on the era's in the first place, so they determine them by matching what another scientist has said is one era or another. Usually era's are defined by some cataclism.
If the isochron slope is 0.0362 when does the Proterozoic Era begins?
2500 m
How do scientist know that K-T extincation took place?
From the PALEOZOIC ERA.
Approximately how long ago did our current era begins?
65 million years
What term do scientist use to apply to the Cenozoic Era?
It is often called the "Age of the Mammals"
