When students have completed their Predictions Tools, divide students into pairs and tell them to compare and contrast their predictions with each other and to look for differences and similarities. Give students 2-3 minutes to compare their predictions.

- Display slide 8 of the PPT and ask students to share their ideas for the biomass of each population after 100 years. Type their predictions in the table on the slide. Try elicit a range of predictions and help students look for similarities and differences in the predictions and reasoning that they share.
- Display slide 9 of the PPT and ask students to share their predictions about what initial settings will result in the greatest biomass of foxes at the end of the 100 year-simulation. Type the predictions for three different groups on the slide (try to get a range of different ideas represented). Help students look for similarities and differences in the predictions and reasoning.

Tell students that they will revisit their ideas after the investigation to see how their ideas changed over time