Question

limestone is the parent rock of ____.
○ quartz
○ gneiss
○ pumice
○ marble

1. choose the correct answer.

quartz’s parent rock is ____.
○ shale
○ hornblende
○ limestone
○ sandstone

1. choose the correct answer.

gneiss can be made from three different parents: __, , and __.
○ pumice; diorite; quartz
○ shale; slate; limestone
○ diorite; hornblende; granite

Explanation:

Question 1 (Limestone is the parent rock of ____.)

To determine the parent rock of a metamorphic rock, we recall metamorphic rock formation. Marble is a metamorphic rock formed from limestone (a sedimentary rock) under heat and pressure. Quartz is a mineral, gneiss has different parent rocks, and pumice is an igneous rock. So limestone is the parent rock of marble.

Quartz is a mineral, but in terms of parent rocks for metamorphic or sedimentary rocks with quartz, sandstone is a sedimentary rock that can be the parent (or source) for quartz - rich materials. Shale is a parent for slate, limestone for marble, and hornblende is a mineral. So quartz's parent rock (in the context of sedimentary - derived) is sandstone.

Gneiss is a metamorphic rock. Its parent rocks are typically igneous or metamorphic rocks. Granite (igneous), diorite (igneous), and hornblende - bearing rocks (or other igneous/metamorphic) can be parents. The option with diorite, hornblende, and granite matches as these are igneous or related rocks that can metamorphose into gneiss. The other options have shale/slate/limestone (shale→slate→phyllite→schist→gneiss? No, shale→slate is lower grade, and limestone is for marble) or pumice (igneous but not a typical parent for gneiss) and quartz (mineral, not a rock parent). So the correct option is diorite; hornblende; granite.

Answer:

D. marble (assuming options are labeled with letters, but based on the choices, the correct option is the one with "marble")

Question 2 (Quartz’s parent rock is ____.)