How does a fire help grasslands? Choose all that apply (Since the last one was just spammed with letters for an answer) Question 5 options:

keeps trees from overtaking the grasses

preserve biodiversity

helps contain only coarse grass

all of the above

answer

i think the answer is a) as air pressure in an area increases, the density of the gas particles in that area decreases.

hope it

i believe you are right for all except the 3rd ( look at sqdancefan his answer is much better)

the answer is c i believe

each chemical family is represented as a group or column on the periodic table. based on chemical properties, there are 6 types of chemical families. group 1 represents alkali metals, group 2 represents alkaline earth metals, groups 3 to 12 represent transition metals, groups 13 to 16 represent non-metals and other metals, group 17 represents halogens and group 18 represents noble gases.