3. Solar panels are composed of smaller units called (1) ______. In a solar cell, crystalline silicon is sandwiched between (2) ______ layers.

3. Before the 20th century, most people knew how to assess freshness using (1) ______, smell, and touch. Many foods are safe to eat far beyond their labeled (2) ______. Low freezer temperatures keep bacteria that cause food (3) ______ in check.

3. One geographic concept that could help you in a zombie apocalypse is (1) ______. Push factors will make you want to (2) ______ somewhere. If a zombie (3) ______ started, it would be safer to start in a city that does not have a direct connection to other cities.

Topics Outline

📖 Topic 1: How to study

🍌 Topic 2: Dark history of bananas

💊 Topic 3: How aspirin was discovered

🚰 Topic 4: What if you don't drink water

✈️ Topic 5: Would you move to Mars

😞 Topic 6: What is depression

🎛 Topic 7: How microwaves work

🚬 Topic 8: How cigarettes affect body

💤 Topic 9: Benefits of a good sleep

🍦 Topic 10: A history of ice cream

⏳ Topic 11: Time management

☕️ Topic 12: A history of coffee

☀️ Topic 13: How solar panels work

🥠 Topic 14: "Expired" food

🧟‍♂ Topic 15: A zombie apocalypse

#topics #outline

Pick your favorite and enjoy learning it! 😉