Pls help pls 1. How do scientists learn about the Earth’s interior? What tools or methods do they use?

2. Which layer of the Earth is the LEAST dense?

3. Which layer of the Earth is the MOST dense?

4. Which layer is described as “flowing, like a plastic” within the mantle?

5. Which layer is liquid due to the temperature?

6. Which layer is the largest?

7. Which layer has created Earth’s magnetic field, the magnetosphere?

8. What does Earth’s magnetosphere protect us from?

9. How are the Northern Lights related to the Earth’s interior?

10 . What are convection currents? Where are they within the Earth, what do they do?

11. How is the Earth like a bar magnet?

12. How do pressure and temperature change as you moved toward the center of the Earth?

13. How does density impact the Earth’s interior?

14. How does the oceanic and continental crust on Earth’s surface interact?

15. How are the Earth’s layers divided?

16.. List the physical layers of the Earth from the crust to the inner core. List their composition (what they are made of) and other important details?