Match the formula for the following compound: hgo2 mercury (iv) oxide mercury (ii) oxide mercury dioxide mercury oxide

What is a scientific theory? a. a scientist's guess about how something works b. the results of an experiment obtained using the scientific method c. a proven fact that will never change d. an idea that is backed by data from many sources

The rules of engagement (roe) working group is often used to (select all that apply.)

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