SLICE OF SCIENCE 🤔: As you enter the classroom, please make a choice and prepare to discuss:

In any ecosystem, the survival of a species depends on the resources that are available. Beneath the tree canopy in a tropical rainforest, growth of some plant species may be limited. The availability of which of these resources most likely limits the growth of plants on the ground level in this ecosystem?

Did you know that the history of life on Earth is told through rocks?

Over millions of years, sediments such as sand and silt were laid down and compressed to form sedimentary rock layers. They preserve a record of ancient landscapes, climates, and organisms. Scientists often determine the correct sequence of sedimentary rock layers using the fossils found within them. They compare the fossils to figure out if two layers are from the same geologic time period, or if one layer is older than the other.

You will use a simulation to help you reinforce this concept. Open the sim in a NEW window. You will be taking screenshots of your work and uploading them here.

1.Complete Level 1: Once you have the correct solution, take a screenshot and upload your work to this formative.

Organize these organisms in the order in which they appeared, from younguest (top) to oldest (bottom) in the easy level. (Hover over each fossil type to look at the names)

1. trilobite
2. dyrosaurs
3. horses
4. protorosaurs
5. pterosaur

Complete Level 2 (Medium). Once you have the correct solution, take a screenshot and upload your work to this formative.

(Medium Level) Which organism became extinct right before the appearance of flowering plants?

Complete Level 3 (Hard). Once you have the correct solution, take a screenshot and upload your work to this formative.

According to the solution you found for the hard level, which organism disappeared from the fossil record right before the appearance of the coelophysis?

According to the solution you found for the "hard level", could icthyosaurs have eaten ammonites ? Explain your answer using evidence from the organization of layers. Your answer must use the ACE strategy, thus it has to be at least three sentences long.

Which two organisms lived only for a relatively short period of geologic time?