How does the water in the waterfall reach to the top?

Basically,it is just because of the water cycle.The water evaporate and falls as rain back to the waterfall.That's why you see that the water never runs out unless in a draught or the freezed waterfall.

Is water a conductor of electricity?

Pure water is not a conductor of electricity but with impurities,e.g.sail,sugar,it is a conductor of electricity.So we must not touch any electrical appliances with wet hands!!!

Ways to prevent us from being electrocuted

1.)Never touch electric appliances with wet hands.

2.)Do not leave wires that the plastic or rubber that has melt.Please change them.
3.)Not to overload the electric circuits.
and......
4.)Make sure we switch off the socket before plugging it off.

Make sure we follow these rules so we will not get electrocuted.

An unforgettable memory

One thing that I could never forget is that on the NE show.I was all drenched that day!And I was very cold to the touch.I actually almost fell sick!Luckily,my mother was still awake and make me fell warm by blowing the hairdryer on me,if not ,I would already fell sick!

my emotions

I sang in a happy tone,sad and frightened tone.It was fun as I got confused whenever I sang the last part of it in any tone