Why do fertilisers need to be soluble

Coquina, a type of limestone, forms from shell fragments that settle on the ocean floor. what type of rock is coquina?

What are some possible short and long term medical concerns for crew members on longer space exploration trips

Which set of characteristics best describes sedimentary rock? a) largest type of rock, made of organic matter, hardest type of rock b) often contains layers, forms near sources of water, contains fossils c) least abundant type of rock, made of other rocks, made mostly of minerals d) most abundant type in earth's crust, made of magma/lava, contains no fossils