起步实验：探究变化磁场中发生的现象？
变化着的磁场产生电场。
变化着的电场产生磁场。
测量某种性质如重力场或磁场的横向变化。
To measure the lateral variation of a property, such as gravity or magnetic fields.
这意味着磁北极的变化与南极磁场发生。
This means that the magnetic North Pole changes place with the magnetic South Pole.
地球核心的磁场正在移动，不加夸张地说，地球内部的方向在发生变化。
The magnetic core of the Earth is moving, literally changing directions inside the Earth.
磁场和温度的影响使水质发生变化。
The changes of the water qualities is the influence of the magnetic field and temperature.
改变磁体的强度，看看内部和外部是怎么变化的。用测量表来测度磁场是如何变化的。
Vary the magnet's strength, and see how things change both inside and outside.
改变磁体的强度，看看内部和外部是怎么变化的。用测量表来测度磁场是如何变化的。
Vary the magnet's strength, and see how things change both inside and outside.
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