Evolutionary History

EH 2.7.1 WARM-UPStudents read about reptile species to reinforce ideas about similarities, differences, and extinction. (5 min)

EH 2.7.2 OSTRILOPE CHANGES OVER TIME

We learned in previous lessons that different species can share structures because they have a common ancestor population. We also learned that when this ancestor population is separated into different environments, natural selection can occur and cause there to be differences in the shared structures of the descendant species. Over very long periods of time, these structures can become very different.

Read the instructions for the Sim activity, discuss and write predictions before beginning. One partner will be partner A and the other will be Partner B.Students should discuss their predictions with their partner.

EH 2.7.2 OSTRILOPE CHANGES OVER TIME

EH 2.7.2 OSTRILOPE CHANGES OVER TIME

•Complete the SIM

•Answer the analysis

Questions.

•Hand In

EH 2.7.3 UNDERSTANDING EVOLUTION FROM FOSSILS

In the Evolutionary History Sim, students study shared structures and extinct species. (15 min)

•Complete the SIM

•Answer the analysis

Questions.

•Hand In

EH 2.7.4 REVIEWING IDEAS AS A CLASSA short reflection activity offers students a chance to share ideas and findings from the activity. (5 min)

EH 2.7.4 REVIEWING IDEAS AS A CLASSA short reflection activity offers students a chance to share ideas and findings from the activity. (5 min)

Discuss with your partner and summarize

one main idea from these activities. Use

whichever words from the word bank help

you explain your idea.

EH 2.7.5 SELF-ASSESSMENTStudents assess their current understanding of the Unit Question: Why do species, both living and extinct, share

similarities and also have differences?

Check Your Understanding

This is a chance for you to

reflect on your learning so far.

This is not a test. Be open and

truthful when you respond to

the questions below.

Scientists investigate in order to

figure things out. Are you

getting closer to figuring out

where to put the Mystery Fossil

in the museum?

TH

RO

UG

H