We began the class period by discussing questions students had about Lessons 17-19. The whiteboard work is shown below:
We extended our learning about ions to the study of ionic compounds, reviewing the Lesson 20 PowerPoint which included the vocabulary terms of cation and anion and learning about how different numbers of anions and cations combine by following the Rule of Zero Charge. Students worked on the Lesson 20 Worksheet and for homework should complete Lesson 20 textbook questions #1-7 and read Lesson 21 in the textbook.
On the final day of work before students share their work by presenting to stakeholders tomorrow, groups put the finishing touches on tri-folds and formulated responses to questions they should anticipate during their presentations. Each student should be prepared to share their understanding of the following list of questions:
- What exactly are algae?
- How do algae obtain energy?
- How do algae fit into the ecosystem?
- How do algae make more algae?
- What does it mean for algae to “bloom”?
- Why do algae bloom?
- When do algae bloom?
- What happens to the ecosystem when algae bloom?
- Why do algae only bloom at certain times?
- What are the conditions that lead to algal blooms?
- Why do algal blooms end?
There are a number of excellent resources on the Internet to help students formulate answers to these questions and many more. Here are a selection: