radiometric dating

The field of geology helped to set the stage for the Theory of Evolution through an understanding that life on Earth is millions of years old erosion can reveal ancient strata of sediment fossils of ancient life can be found in these ancient strata of rock all of the above OO OO

Radiometric dating is a technique used to determine the age of rocks. Geologists have used this technique to determine that:   A. The universe started with the "Big Bang."   B. Earth is about 6.2 trillion years old, and life appeared on Earth about 4.9 trillion years ago.   C. Earth is about 4.6 billion years old, and life appeared on Earth about 4.1 billion years ago.   D. Earth is about 4.6 million years old, and life appeared on Earth about 4.4 million years ago.   E. Earth is about 6.2 thousand years old, and life appeared on Earth about 6 thousand years ago.

Which of the following events are possible sources of high levels of iridium in sediments? Write 'yes' or 'no' next to each of the four possibilities. There may be more than one 'yes' response. 4. An asteroid impact Rain Fossilized foraminifera A supernova

Based on the maximum body volume of organisms preserved in the fossil record, body volume (as measured in log mm ) has increased over the last 3.5 billion years. The trend in growth over time is depicted in the graph where the x-axis is a measure of time in millions of years ago. Three boxes, each associated with a vertical dotted line that marks specific time points along the x-axis, have been provided. Place a check mark in the boxes to indicate when drastic increases in atmospheric oxygen are likely to have occurred. Body volume (log mm³) 4,000 2,000 1,000 Time (millions of years ago) 3,000 O Answer Bank ✓