Basics of Atoms, Charge, and Electric Current. Science TNSB Mentoring, Class 9: lessons, tests, tasks.

1.	Nucleus Difficulty: easy	2
2.	Current Difficulty: easy	3
3.	Electrical units Difficulty: easy	3
4.	Electrons in a charge Difficulty: medium	4
5.	Electron transfer Difficulty: medium	5
6.	Flow of current Difficulty: medium	4
7.	Current in a circuit Difficulty: medium	4
8.	Electron current Difficulty: hard	6
9.	Electric lines of force Difficulty: hard	6

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Basics of Atoms, Charge, and Electric Current