II. Assignment Time Periods Answer the following questions using the data Table
ID: 115597 • Letter: I
Question
II. Assignment
Time Periods
Answer the following questions using the data Table 1, and the Era’s numbered as in the table. Make sure to show all calculations.
If Era (1) occurred 4.6 billion years ago from today, how long ago did Era (9) end?
If Era (1) occurred 4.6 billion years ago from today, how long ago did Era (8) end?
About how many years ago did some of the earliest life on Earth form?
About how many years did it take after Era (8) for there to be oceans on Earth?
How many years were there between Era (5) and the end of Era (8)?
If 81 objects around the size of our Moon collided in order to form Earth during the time period in (E.), roughly how many years went by between these impact events (if they were evenly spaced out).
Time (Years) Era Description 1) Pre-solar Nebula Era 2) Asteroid Era 3) Gas Giant Era 0.0 Collapse of cloud to form flattened disk million Formation of large asterolds up to 200 km across ends 10 million Rapid formation of Jupiter and Saturn ends 50 million ) Solar Birth Era Sun's nuclear reactions start to produce energy in core 51 million 5) Planetessimal Era Formation of numerous small planet-sized bodies ends 80 Solar winds sweep through inner solar system and strip 6) T-Tauri Era mion off primordial atmospheres 7) Ice Giant Era 90 million Formation of Uranus and Neptune Formation of rocky planets by mergers of 50-100 100 million smaller bodies 8) Rocky Planet Era Migration of Jupiter disrupts asteroid belt sending large asterolds to impact planetary surfaces in the inner solar 600 9) Late Heavy Bombardment (LHB) Era million system 10) Ocean Era LHB transports transports comets rich in water to Earth (up to this point all is also 600 referred to as the Hadean Era) million to form oceansExplanation / Answer
Total time passed is 4.6 billion years.
The Era 9 ended 600 millions years ago so Era (9) ended 4 billion years ago. (4.6-0.6)
The Era 8 ended 100 millions years ago so Era (8) ended 4.5 billion years ago.(4.6 -0.1)
The first trace of life in fossil is found 800 millions so the first life form was formed 3.8 billion years ago (4.6 -0.8)
The oceans are formed in Era (10) which occurred 600 million years ago so the gap between Era (8) and Era (10) is 500 million years (600-100)
The Era (5) started at 51 million years and Era (8) ended just before 600 million years so the years between were 549 million years.
Please ask the next question in separate questionnaire.