Plants use their roots to get oxygen. Oxygen is dissolved in water, and there's also air pockets in their grow medium to provide a source of oxygen. When you water your plants too often, its roots are sitting in stagnant water which no longer has any oxygen left.
Which point(s) in the water cycle below best illustrate(s) water changing to a gas, and which term(s) could describe it? Is it.. 1; sublimation & evaporation. 2; evaporation only.
The chart below shows the relationship between temperature, pressure and the changes of state for a typical material. At a given pressure, you can draw a line across the chart to see the temperatures at which the material will change from solid to liquid and from liquid to gas.