for the crack
how has coal mining changed over time
becose they have just changed
the appearance of many factories and how they changed over time.....
It was invented in ancient China and at first it was a water clock that was used. Candles with designated markings were also used to tell time. Man has always measured time in some format.
for the crack
we can drink it!
by peolpe and water
No. If you had a very, very accurate clock and you checked the time over and over you would not get the same measurement because the time would have changed!
Yes. We currently believe that it has changed over time. It is believed that the Earth was first dry and that water was delivered to it later by cometary or meteoric impactors.
the water got piloted
they got more water and animals
how the anemometer changed over time
how the anemometer changed over time
The laws of physics have not changed over time. Our understanding of them has changed over time.
how has coal mining changed over time
You can measure time using a: Sundial Water Clock Sandglass Pendunum Clock Quartz Clock