Earth Sciences Midterm |66 Exam 1 Questions And Answers |Test Skills

Earth Sciences Midterm |66
Exam 1|Test Skills

Cooler, older, oceanic lithosphere sinks into the mantle at ______ . - ✔ ✔
subduction zones along convergent plate boundaries

Correct statements - ✔ ✔ 1. Magmas crystallize to form igneous rocks.

2. Igneous rocks can undergo metamorphism.

3. Metamorphic rocks may melt to become magma.

4. Igneous rocks may undergo weathering and produce sediments.

Diorite - ✔ ✔ Texture: Phaneritic

Composition: Intermediate

Gabbro - ✔ ✔ Texture: Phanertic

Composition: Mafic

Garnet Mg3Al2(SiO4)3 - ✔ ✔ Silicates

Gypsum CaSO4*2H2O - ✔ ✔ Sulfates

Halite (NaCl) - ✔ ✔ Halides

Hornblende and the other amphiboles have what type of silicate structure?
- ✔ ✔ double chains

In a porphyritic volcanic rock, which mineral crystals are the last to
crystallize? - ✔ ✔ matrix or groundmass

, In correct order from the center outward, Earth includes which units? - ✔
✔ inner core, outer core, mantle, crust

Malachite Cu2CO3(OH)2 - ✔ ✔ Carbonates

New oceanic crust and oceanic lithosphere are formed at _______ . - ✔
✔ divergent boundaries by submarine eruptions and intrusions of
basaltic magma.

Obsidian - ✔ ✔ Texture: Glassy

Composition: Felsic

Orthoclase KAlSi3O8 - ✔ ✔ Silicate

Pyrite (FeS2) - ✔ ✔ Sulfides

Pyroxene MgSiO3 - ✔ ✔ Silicates

Rhyolite - ✔ ✔ Texture: Aphanitic:

Composition: Felsic

Sphalerite (ZnS) - ✔ ✔ Sulfides

Sulfur (S) - ✔ ✔ Native elements

Which mineral is composed of silicon dioxide (SiO2)? - ✔ ✔ quartz



The __________ is a liquid, metallic region in the Earth's interior. - ✔ ✔
outer core

The ___________ is the relatively cool brittle plates of plate tectonics. - ✔
✔ lithosphere