PLEASE HELP ASAP, WILL GIVE BRANLIEST!! The best practice of scientists is to label all containers while they are empty. Why do you think they do that?

Help i don't understand

How would you reduce the volume of gas

What method(s) do plants use to obtain nitrogen? select all that apply. absorb it from the atmosphere use bacteria to convert nitrogen to usable form obtain usable nitrogen compounds from the soil absorb nitrogen from water taken in at the roots

When a scientific theory has been tested and proved by the scientific community, it becomes a law