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Name: ________________________________________ Date: ________________________ Block: ___________ Magnets Study Guide Target 1: I can determine the factors that affect the strength of electric and magnetic forces. 1. Name three materials that are magnetic. a. ____________________________________ b. ____________________________________ c. ____________________________________ 2. What force is pulling objects towards earth? ______________________________ 3. Two "like" poles _______________________________ each other. 4. Two "opposite" poles ______________________________ each other. 5. The space around a magnet where the magnetic forces work, where they can attract or repel magnetic materials is known as the ___________________________________. 6. The field lines are more concentrated around the _____________________________. 7. Sketch the magnetic field of the bar magnet below. 8. Sketch the magnetic field of the electromagnet below. 9. Look at your sketches, how does the magnetic field of a bar magnet relate to that of an electromagnet? 10. Name three ways that you can strengthen the magnetic field of an electromagnet. a. ____________________________________________________________________ b. ____________________________________________________________________ c. ____________________________________________________________________ 11. Name the main difference between a permanent magnet and an electromagnet. 12. Name two examples of how electromagnets are used in the real world. a. ____________________________________________________________________ b. ____________________________________________________________________ Target 2: I can conduct and evaluate an investigation that proves that non-contact force fields exist. 13. An object can have an electric charge by either gaining or losing _________________________. 14. Name two real world examples of static electricity. a. ____________________________________________________________________ b. ____________________________________________________________________ 15. What is the charge of an object if it gains electrons? _______________________________ Target 3: I can argue that gravitation pull depends on the masses of two objects. Use the your knowledge from the labs we conducted and the BrainPop videos to answer numbers 16-18. 16. Label the poles and sketch Earth's magnetic field below. How did this field form? 17. How do you use a compass? How does it work? 18. Name an example of something that might interfere with your use of a compass. 19. What is the correlation between mass and gravitational pull?