Unit 7 Review

Rocks are classified as igneous, sedimentary, or metamorphic based mainly on their

• texture and shape

• method of formation

• grain size

• mineral content

Aidan has taken notes in class in his journal. He has written down the acronym "CHNOPS" because it represents the 6 most abundant elements that make up our Earth. Which option below correctly names the 6 most abundant elements that make up our Earth?

• Calcium, Helium, Nitrogen, Oxygen, Phorphorus, Sulfur

• Calcium, Hydrogen, Sodium, Oxygen, Potassium, Sulfur

• Carbon, Hydrogen, Sodium, Oxygen, Potassium, Silicate

• Carbon, Hydrogen, Nitrogen, Oxygen, Phosphorus, Sulfur

Which of the following diagrams shows where the asthenosphere, mantle, and core would be labeled on a model of Earth's layers?

• Diagram A

• Diagram B

• Diagram C

• Diagram D

In order for sedimentary rock to form, which of the following must occur?

• Compaction

• Intrusion

• Oxidization

• Metamorphism

The picture shows a sample of a rock. This rock would be classified as metamorphic because it shows -

• a mixture of minerals

• an organic composition seen as crystals

• crystals from precipitation from slow cooling magma

• distorted banding from heat and pressure

The four "spheres" of the earth are the Atmosphere, Biosphere, Hydrosphere, and Lithosphere. What is the one element that all of these spheres have in common?

• They all contain Oxygen

• They all contain Calcium

• They all contain Helium

• They all contain Phosphorus

The picture below shows a rock of gneiss, which has observable layers and formed deep underground due to heat and pressure. What type of rock is gneiss?

• Foliated metamorphic rock

• Intrusive igneous rock

• Chemical sedimentary rock

• Clastic sedimentary rock

Metamorphic rock is formed by —

• compacting and cementing

• erosion and weathering

• melting and cooling

• heat and pressure

Layers A and B are both layers of the crust. Determine the correct descriptions of Layer A and Layer B.

• Layer A is the Continental crust and is less dense than Layer B because it is made up of mainly silicates. Layer B is the Oceanic crust and is more dense because it is made up of mainly basalt, iron, and magnesium.

• Layer A is the Continental crust and Layer B is the Oceanic crust. Their densities are equal because the elements inside of their layers are continuously mixed up due to convection current movements.

• Layer A is the Oceanic crust and Layer B is the Continental crust. They are made up of different elements therefore their densities cannot be compared.

• Layer A is the Oceanic crust and is more dense than Layer B because it is thicker in size. Layer B is the Continental crust and less dense because it is smaller in size.

Tags

NGSS.MS-ESS2-2

Which process is necessary for the formation of igneous rocks?

• Deposition of lava in mountains

• Erosion through layering

• Solidification and cooling of magma

• Compaction of minerals through heat and pressure