1. 1Daily Warm-Up Exercises1 Day 29 What is a fossil? A fossil is a remnant or trace of an organism (plant or animal) embedded and preserved in a rock. Which type of rock is most likely to contain fossils? Why? Sedimentary, because it’s formation doesn’t destroy the fossil.

2. 22 Now  Turn to the Earth History Time Line on page 51. Your task is to divide your 4.5- meter adding-machine tape into eras and periods.  Draw a line at one end of your tape and label it "Now."

3. 33 Quaternary Period  The Quaternary period started 1.6 mya. How many millimeters is that? 1 million years = 1 millimeter, so 1.6 million years = 1.6 millimeters  Draw a line 1.6 mm from the Now line and label that tiny section the "Quaternary Period."

4. 44 Tertiary Period  The Tertiary period started 6.6 mya. How many millimeters is that?  Draw a line 66 mm from the Now line and label that section the Tertiary Period." 1 million years = 1 millimeter, so 6.6 million years = 66 millimeters

5. 55 VERY IMPORTANT!!!  All measurements must be made from the Now line.  The zero end of the ruler must always stay on the Now line.

6. 66 Mark Eras  When you finish all the periods, go back and draw a heavy line to mark the beginning of each era.  Label the era by writing its name across the periods.