Question

question 26 of 26 the photograph shows aluminum cans. where is aluminum found? a. in metamorphic rock b. in igneous rock c. in granite rock d. in sedimentary rock

Explanation:

Aluminum is primarily found in bauxite, which is a type of sedimentary rock? No, wait, actually, aluminum - bearing minerals are often found in igneous rocks? Wait, no, let's recall: Bauxite, the main ore of aluminum, is a sedimentary rock? Wait, no, correction: Bauxite is a sedimentary rock formed from the weathering of aluminum - rich rocks. But the options here: Igneous rocks: Aluminum - rich minerals like feldspar are common in igneous rocks (like granite, which is an igneous rock). Wait, but the main ore of aluminum is bauxite (sedimentary). But among the options, let's analyze each:

• Option A: Metamorphic rocks are formed by metamorphism of other rocks. Aluminum - bearing minerals in metamorphic rocks are derived from original rocks, not the primary source of aluminum.
• Option B: Igneous rocks: Aluminum is a major element in the Earth's crust. Igneous rocks like granite (which is option C, but granite is a type of igneous rock) contain aluminum - rich minerals (feldspar). But bauxite is sedimentary. Wait, maybe the question is about the occurrence. Wait, the most common source of aluminum ore (bauxite) is sedimentary? No, bauxite is a sedimentary rock. But among the options, let's check:

Wait, maybe I made a mistake. Let's re - evaluate:

Aluminum is abundant in the Earth's crust. Igneous rocks are formed from the cooling of magma. Minerals like feldspar (which contains aluminum) are common in igneous rocks. But the main ore of aluminum, bauxite, is a sedimentary rock. However, among the given options, the correct answer is B? Wait, no, let's check the options again.

Wait, granite (option C) is an igneous rock. But the question is where aluminum is found. Let's think about the composition:

Igneous rocks: Aluminum is a major component of the Earth's crust, and igneous rocks (like granite) contain aluminum - bearing minerals. Bauxite (sedimentary) is the ore, but the question is about where aluminum is found (not just the ore). So in terms of rock types, aluminum is found in igneous rocks (since the crust is mostly igneous in origin, and aluminum - rich minerals are in igneous rocks). Also, bauxite is sedimentary, but among the options, the best answer is B? Wait, no, let's check the options:

Option B: In igneous rock. Igneous rocks make up a large part of the Earth's crust, and aluminum - containing minerals (like feldspar) are present in igneous rocks. Option D: Sedimentary rock (bauxite is sedimentary, but is that the case here? Wait, maybe the question is about the natural occurrence. Let's recall that aluminum is found in igneous rocks as part of the crustal composition. So the correct answer is B.

Answer:

B. In igneous rock