Over millions of years, a flowing river cut a canyon through a mountain exposing many different
layers of rock. Upon examining the strata, paleontologists discovered an amazing assortment of
fossils! Examine the images below this block of text. You will see pictures of 7 different living
organisms. These organisms lived at different times in Earth's history. Using the "Geologic Time
Scale Reference Table" determine where each of the 7 organisms would be found in the rock
strata and the approximate time each organism first appeared on Earth. Drag and drop each
picture into the correct square below. In the rectangular boxes to the right of the picture, type
the approximate time (in millions of years) to indicate the age of each organism.