How did scientists discover that all living things are made of cells? (2-3 sentences ! ) ((15 points))

The modern cell theory states that all known living things are made up of cells and that the cell is structural & functional unit of all living things.The cell was first discovered and named by Robert Hooke in 1665. He dicover the cells using the new invented microscope. So, the microscope enabled the discovery of cells. Hooke remarked that the cell looked strangely similar to cellula or small rooms which monks inhabited, thus deriving the name.

answer: ice crystals in air

the water from the water body or another source of water gets evaporated as water vapor as an effect of heat on water. these water vapor rises in the upper layers of the earth atmosphere under high atmospheric pressure. the atmospheric pressure of these water molecules starts to decrease due to the effect of cold air. the invisible water vapor condenses into visible water droplets and ice crystals.these ice crystals and water droplets being less denser than the surrounding air floats on air as clouds.