2 one point in time, this cliff was solid rook There was little else here. Over time, lichens have chemically altered the surface and soil has begun to form Before that happened the solid rock was physically weathered and broken inte smaller pieces by what
agent
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water and wave action
alternate freeting and thawing
acid rain reacting with carbonate

i had this on my unit activity, i can you if you are a plato student. are you a plato student?

i think so it’s will be b yes i believe its

a gas, having a molecular weight of 13 kg/kmol and a kinematic viscosity of 0.25 cm2/s, flows through a pipe 0.25 m internal diameter and 5 km long at the rate of 0.4 m3/s and is delivered at atmospheric pressure.