根据英文解释，写出单词。

1. not tall ________                      

2. the parent of your father or mother ________

3. be from ________

4. an activity (活动) that you enjoy doing in your free time ________

5. Saturday and Sunday ________

黑子出现活跃时会对地球的磁场和电离层造成干扰，并会在地球的两极地区引发什么？