question 1\n2 pts\nthe formation of chalk is due to \n- evaporation of magnesium rich waters\n- direct…

question 1\n2 pts\nthe formation of chalk is due to \n- evaporation of magnesium rich waters\n- direct precipitation from seawater\n- magnesium rich fluids that chemically alter limestone bearing reefs\n- the hard parts of microscopic organisms that accumulate on the sea floor\n\nquestion 2\n2 pts\nfelsic rocks melt at a temperature that is \n- lower than both intermediate and mafic rocks\n- higher than mafic rocks but lower than intermediate rocks\n- higher than intermediate rocks but lower than mafic rocks\n- lower than mafic rocks but higher than intermediate rocks

question 1\n2 pts\nthe formation of chalk is due to \n- evaporation of magnesium rich waters\n- direct precipitation from seawater\n- magnesium rich fluids that chemically alter limestone bearing reefs\n- the hard parts of microscopic organisms that accumulate on the sea floor\n\nquestion 2\n2 pts\nfelsic rocks melt at a temperature that is \n- lower than both intermediate and mafic rocks\n- higher than mafic rocks but lower than intermediate rocks\n- higher than intermediate rocks but lower than mafic rocks\n- lower than mafic rocks but higher than intermediate rocks

Answer

Brief Explanations:

Chalk is a soft, white, porous sedimentary rock formed from the hard parts of microscopic organisms like coccolithophores that accumulate on the sea - floor. Felsic rocks have a high silica content and generally melt at lower temperatures compared to intermediate and mafic rocks due to their chemical composition.

Answer:

Question 1: the hard parts of microscopic organisms that accumulate on the sea floor Question 2: lower than both intermediate and mafic rocks