• Clear – easy to understand

• Realistic – something you can actually achieve

• Personal – meaningful and important to you

For extra credit, you are assigned the following homework:

1. Use Microsoft Excel to create a graph (you may choose a line graph, bar graph, or pie chart).

2. You are free to select your own table/topic (for example: sports, class survey, population, environment, or any dataset of interest).

3. Attach your graph here.

Please complete the IXL practice: Homeostasis and Feedback Loops.
🔹 Make sure you read each question carefully and think about the difference between positive and negative feedback.
🔹 You may use the tutorial video below if you’re stuck.

📺 Helpful Video:
Positive and Negative Feedback Loops – Paul Andersen YouTube

Let me know here if you face any challenges or have questions about the exercise.

Good luck!

Silver: What happens in the alveoli?

Gold: How do circulatory and respiratory systems help maintain homeostasis?

Platinum: Predict what could happen to athletes at high altitudes.

For your next assignment, you need to create a 3D model of the respiratory system. Please research different ideas and methods online to get inspiration. You can use materials like balloons, clay, pipe cleaners, paper, or recycled items.

Make sure your model shows the main parts: trachea, bronchi, bronchioles, lungs, alveoli, and diaphragm. Be creative and think about ways to make it interactive, like showing how the lungs expand and contract.

Start your research and bring your ideas to class.

1️⃣ Challenges:
What was hard?

2️⃣ Easy parts:
What went smoothly?

3️⃣ Rate it:
⭐ 5 = Very Easy
⭐ 1 = Very Hard

☐ 1 ☐ 2 ☐ 3 ☐ 4 ☐ 5

4️⃣ Comments:
Any suggestions?

After watching, answer the following questions:

1- When you inhale, does the diaphragm move up or down?

2- When the diaphragm moves down, what happens to the space inside the chest cavity?

3- Describe the relationship between air pressure and lung volume during breathing.

4- What might happen if the diaphragm stopped working properly?

1️⃣ Challenges:
What was hard?

2️⃣ Easy parts:
What went smoothly?

3️⃣ Rate it:
⭐ 5 = Very Easy
⭐ 1 = Very Hard

☐ 1 ☐ 2 ☐ 3 ☐ 4 ☐ 5

4️⃣ Comments:
Any suggestions?

Please type your own reflection in a Word document and answer all the questions below in complete sentences:

Reflection Questions:

1. What was your Sustainability PBL project about?

2. What new knowledge or skills did you learn during the project?

3. Why is sustainability important for the UAE and the world?

4. What challenges did you face while working on the project, and how did you overcome them?

5. How can your project idea create real positive change in your school or community?

📤 After completing your reflection, upload your Word document to Padlet.
Make sure your work is neat, clear, and written in your own words.

• Enzyme

• Substrate

• Site of action

• pH

• Product

Extension (GT):
Explain how enzyme malfunction could lead to nutrient deficiencies.

Deadline: On Thursday, January 22, 2026