Question

1) How is sand formed?
2) For what igneous, sedimentary, and metamorphic rocks are used?​

Answer 1

Answer:

1. Sand forms when rocks break down from weathering and eroding over thousands and even millions of years. Rocks take time to decompose, especially quartz (silica) and feldspar. Often starting thousands of miles from the ocean, rocks slowly travel down rivers and streams, constantly breaking down along the way.
2. Quartzite and marble are the most commonly used metamorphic rocks. They are frequently chosen for building materials and artwork. Marble is used for statues and decorative items like vases (Figure). Quartzite is very hard and is often crushed and used in building railroad tracks.

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Answer 2

Answer:

From igneous

Explanation:

when the volcano bursts out the lava comes out this lava becomes cold and the liquid becomes solid. when this solid igneous rocks are beaten by air water and heat, this form to sand.