Oxygen, sodium, and boron are examples of what type of matter?

a. compound
b. heterogeneous mixture
c. element
d. solution

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

Word equation for k(s)+h2o(l) yield koh(aq) + h2(g)

What must occur for air masses to form fronts