What type of rock is formed from particles laid down by water of wind? igneous sedimentary metamorphic crystal

What three things determine the shape and size of a puddle when water is poured out onto a surface

Answer asap : ( a. how does mucus prevent the entry of pathogens? b. describe two ways white blood cells protect us from pathogens.

How many moles of lead are in 1.50 x 10^12 atoms of lead? could you explain the answer as well and not just give it to me i am refreshing for finals and i need to know how to do it