Diatoms are made of silica (hydrated silicon dioxide)
Most likely clay, silt and sand are to be found in samples of rocks.
An algal bloom affects the whole ecosystem. Consequences range from the benign feeding of higher trophic levels, to more harmful effects like blocking sunlight from reaching other organisms, causing a depletion of oxygen levels in the water, and, depending on the organism, secreting toxins into the water.
Answer:
this is chemistry not biology
