LAB 3: IGNEOUS ROCKS Extension 1. What are the two types of igneous rock, and ho

Question

LAB 3: IGNEOUS ROCKS Extension 1. What are the two types of igneous rock, and how does each form? 1. 2. 2. What eight elements are most common in magmas (and in the Earth's crust)? (unital) Mafic rocks will usually crystallize at temperatures greater than Minerals that crystalize from mafic magma include These minerals are rich in the elements 3. and and 4. Felsic rocks will usually crystallize at about the temperature (units) Minerals that crystalize from felsic magma includeand These minerals are rich in the elementsand 5. How are igneous rocks classified (what two factors)? 6. What are the two main igneous textures? 7. What are the four igneous compositions? 8. How is the composition of a rock estimated?

Explanation / Answer

QUESTION 1

What are the two type of igneous rock and how does each form ?

ANSWER

Two types of igneous rock based on rates of cooling

Formation : volcanic rock cool quickly and form on the surface of earth around the volcanoes .they sometime called lava rock also .

Formation: Thise rock forms from the slow cooling of magma within he earth’s crust .

QUESTION 2

What eight elements are most common in magmas ( and in the earth’s crust )?

ANSWER :

Oxygen ( it is most abundant in the earth’ crust )

Silicon

Aluminium

Iron

Calcium

Sodium

Mgnesium

Potssium

QUESTION 3

Mafic rocks will usually crystallize at temperature greater than ………… (units )

Minerals that crystalize from mafic magma include ……………. And …………………….

These minerals are rich n the elements ……………. And ………………….

ANSWER:

Mafic rocks will usually crystallize at temperature greater than 9000C (units )

Minerals that crystalize from mafic magma include olivin And pyroxenes

These minerals are rich in the elements magnesium And Iron

QUESTION 4

Felsic rocks will usually crystallize at about temperature ………… (units )

Minerals that crystalize from Felsic magma include ……………. And …………………….

These minerals are rich n the elements ……………. And ………………….

ANSWER

Felsic rocks will usually crystallize at about temperature 750 0 C (units )

Minerals that crystalize from Felsic magma include quartz. And orthoclase (feldspar)

These minerals are rich In the elements Potassium And silica

Related Questions

Navigate

• Browse (All)
• Browse L
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.