Question

1. What are rocks and minerals?
2. How are extrusive igneous rocks formed?
inerals​

Answer 1

Answer:

1. A mineral is a naturally occurring, inorganic compound with a unique chemical structure and physical properties. A rock is a solid, stony mass composed of a combination of minerals or other organic compounds. For example, quartz and feldspars are minerals, but when formed together, they make a rock, granite.
2. Extrusive, or volcanic, igneous rock is produced when magma exits and cools above (or very near) the Earth's surface. Quick cooling means that mineral crystals don't have much time to grow, so these rocks have a very fine-grained or even glassy texture.

Answer 2

Answer:

1. A mineral is an element or chemical compound that is normally crystalline and that has been formed as a result of geological processes.

A rock is any naturally occurring solid mass or aggregate of minerals or mineraloid matter. It is categorized by the minerals included, its chemical composition and the way in which it is formed.

2. Extrusive igneous rocks, also known as volcanic rocks, are formed at the crust's surface as a result of the partial melting of rocks within the mantle and crust. Extrusive igneous rocks cool and solidify more quickly than intrusive igneous rocks. They are formed by the cooling of molten magma on the earth's surface.