Understanding: Magnetism Your name here: ___________________________________ Watch the video, answer the questions... (This video is also available all over the internet. If you miss part in class, look online!) 1. If there was no magnetism, what would we be missing? ______________, even _____________ from the ________. 2. What was Humans' first clue that magnetism existed? ___________________________________________ _________________________________________________________________________________________________________ 3. What makes up this mysterious stone? ____________________________________________________________ 4. Does lodestone really cure disease? ________________________________________________________________ 5. According to Peregrinus, what does lodestone do? _______________________________________________ _________________________________________________________________________________________________________ 6. Describe a compass. _________________________________________________________________________________ 7. What does Earth's magnetic field really come from? _____________________________________________ _________________________________________________________________________________________________________ 9. How does an atom create a magnetic field? ________________________________________________________ _________________________________________________________________________________________________________ 10. What is a domain? Explain in terms of atomic alignment. ________________________________________ _________________________________________________________________________________________________________ 11. What does Earth's magnetic field protect us from? _______________________________________________ _________________________________________________________________________________________________________ 12. What evidence of Earth's magnetic field do we see in the skies? What is its correct name and common name? ______________________________________________________________________________________ _________________________________________________________________________________________________________ 13. How do we know that Earth's magnetic field has changed its alignment? How recently did it last change? ___________________________________________________________________________________________ _________________________________________________________________________________________________________ 14. What device measures the magnetic field strength? ______________________________________________ 15. How did magnetism 'drive' the theory of plate tectonics? ________________________________________ _________________________________________________________________________________________________________ 16. When is Earth's magnetic field due to change again? Are we sure? ______________________________ _________________________________________________________________________________________________________ 17. How do critters use magnetism? What is it called? ________________________________________________ _________________________________________________________________________________________________________ 18. How did Cornell researchers test pigeon's ability to use magnetic fields? ______________________ _________________________________________________________________________________________________________ 19. Describe how biomagnetism may occur in nature. ________________________________________________ _________________________________________________________________________________________________________ 20. Sketch the bacteria to show its internal direction finder. Label and state the approximate magnification. 21. Describe how the bacteria follow magnetic field lines to find food. _____________________________ _________________________________________________________________________________________________________ 22. Where does magnetite exist in humans? What function does it perform? ______________________ _________________________________________________________________________________________________________ 23. What does MRI stand for? What does an MRI machine do? ______________________________________ _________________________________________________________________________________________________________ 26. When you put electricity together with magnetism, what do you get? __________________________ _________________________________________________________________________________________________________ 27. How did Oersted describe that an electric current generates a magnetic field? ________________ _________________________________________________________________________________________________________ 28. What famous researcher continue Oersted's research to great acclaim? ________________________ _________________________________________________________________________________________________________ 29. List a few ways that magnetism has enabled the information age? ______________________________ _________________________________________________________________________________________________________ 30. Describe an electromagnetic wave. _________________________________________________________________ _________________________________________________________________________________________________________ 31. Describe how MagLev works. _______________________________________________________________________ _________________________________________________________________________________________________________ _________________________________________________________________________________________________________ 32. What keeps the Sun burning? _______________________________________________________________________ 33. How would you contain a fusion reaction? _________________________________________________________ _________________________________________________________________________________________________________ 34. At Fermilab, how do they accelerate particles in a circle? _________________________________________ _________________________________________________________________________________________________________ 35. What do they hope to find at Fermilab? Describe in detail. _______________________________________ _________________________________________________________________________________________________________ _________________________________________________________________________________________________________ _________________________________________________________________________________________________________ _________________________________________________________________________________________________________ _________________________________________________________________________________________________________