Geography, 21.09.2019 04:30 shymitch32
Earth is very old, and it can be difficult to visualize where key events in the history of life occurred against this backdrop of "deep time." one common way to represent geologic time uses the analogy of a one-hour countdown timer. the timer starts from the top at earth’s origin (4.6 billion years ago) and moves clockwise to the present, making one full circle. in this analogy, one hour represents 4.6 billion years, one minute represents roughly 76.67 million years, and one second represents roughly 1.28 million years. (open hint 1 for an explanation of how these calculations are done.)
a. 1.0 billion years oldb. 2.0 billion years oldc. 2.3 billion years oldd. 4.5 billion years old
Answers: 3
Geography, 23.06.2019 00:10
Simple astronomical telescope the objective lens has a focal length of 75 cm and that of a piece of 5cm of the lenses are 18 cm apart when will be final image of a distant object before
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Geography, 23.06.2019 04:31
Anight-club bouncer, now a top official,put coke or pepsi in it; first three initial. combine all lakes; but i still have more,of all the places; i have the largest shore.what am i? ?
Answers: 3
Geography, 23.06.2019 08:10
Which of the following best describes the purpose of a nation’s boundaries? a. to limit the movement of goods and people b. to make it easier for cartographers to create maps c. to make the movement of goods and people easier d. to prevent other countries from invading territory
Answers: 1
Earth is very old, and it can be difficult to visualize where key events in the history of life occu...
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