You observe the ice melt. You can measure the resulting reduction in the water temperature.
When you slowly squeeze and release the bulb filled with water, you will observe that the water inside the bulb will be pushed outwards when squeezed and then flow back into the bulb when released. This is due to the pressure exerted on the water inside the bulb, causing it to move in and out of the bulb.
corrosion-resistant steel
What did you observe! This is not a question we can answer as we were not present when the salt was added.
The dihydrated salt is blue-green.
no, MDF cannot observe water
You observe the ice melt. You can measure the resulting reduction in the water temperature.
Plants don't observe anything, they don't have eyes.
You will observe a pencil on a glass of water. Unless you're not looking that way, in which case, you will observe whatever you happen to be looking at. Unless, you're blind, in which case you won't observe anything.
as you observe they going down and it's snapping
You can observe water droplets on the surface of a chilled bottle because the temperature of the atmosphere is a different temperature to that of the temperature in the chilled bottle.
they observe water,dirt,dust,and bacteria that the sponge is obtaining
Using ultrarapid photograhy.
I f you want to observe this theory in simple way ,you can observe it through using filter paper has ink on it and leave it in water ,after time when the water get evaporated you will observe that the ink was separated and this is a simple chromatography. And this is core concept for chromatography. Saleh Qahtani Lab Tech
A Periscope or Radar
At room temperature water is a liquid. You can observe (or measure) density, viscosity, thermal conductivity, electrical resistivity, refractive index etc.
Water conversation in a very important task and it#s a good idea to get used to some simple rules in order to reduce the own water consumption. A good starting point to observe water conservation is for example the page "WaterUseItWisely" or "MonoLake".