ROCK Jeopardy!

ROCK Jeopardy! Classifying Igneous Sedimentary Metamorphic Rock Cycle

What are rocks made of?

Minerals and other materials. Back to Menu

The size, shape, & pattern of rock grains is called what?

Texture. Back to Menu

A rock like Pumice has many holes in it and can be described as _______. How does this affect its density?

Porous. This makes the rock less dense and able to float in water. Back to Menu

What is the texture of a rock with visible, large grains? Small grains, easier to see with a hand lens?

1.Coarse-grained 2.Fine-grained Back to Menu

How can a rock have no grains? Give an example.

If rock cools very quickly, large crystals will not form, resulting in smooth, glassy texture. Ex: Obsidian. Final Jeopardy Back to Menu

How are Igneous rocks classified?

1.Origin 2.Texture 3.Mineral Composition Back to Menu

What are the 2 origins an Igneous rock can have, and where are they?

Intrusive & Extrusive; inside the crust and on the surface. Back to Menu

An Igneous rock texture that has widely varying sizes of crystals.

Porphyritic. Back to Menu

What compound changes the color of rock? How does the color change when the amount of compound increases / decreases?

Silica - more Silica gives a lighter color. Less Silica gives a darker color. Back to Menu

Describe the texture of each sample:

1.Fine-grained 2.Porphyritic 3.Coarse-grained 4.No crystals Final Jeopardy Back to Menu

What are the 3 types of Sedimentary rocks?

Back to Menu 1.Clastic 2.Organic 3.Chemical

What is sediment and how is it created?

Back to Menu Sediment: pieces of material from rock or living things. Created by weathering.

What are the 2 types of weathering? Give 2 examples of each.

Back to Menu Mechanical / Physical 1.Abrasion 2.Plants 3.Animals 4.Freezing / Thawing Chemical 1.Water 2.Acid Rain 3.Carbon Dioxide (CO2) 4.Oxygen (Rust)

Describe the differences between Clastic, Organic, & Chemical rock.

Clastic Clastic: formed mainly through compaction Organic Organic: contains remains of once living creatures Chemical Chemical: forms from solution - evaporation Back to Menu

List and describe the 5 steps that form Sedimentary rocks.

Weathering 1. Weathering: breaking rocks down into sediment Erosion 2. Erosion: carrying sediments by wind or water Deposition 3. Deposition: when sediment is “dropped off” Compaction 4. Compaction: layers of rock pressing together Cementation 5. Cementation: solution crystallizes, gluing sediment together Final Jeopardy Back to Menu

What are the 2 driving forces of Metamorphism?

Heat & Pressure Back to Menu

True or False: Continental crust is made mostly of gneiss and the oceanic crust is made mainly from schist. If false, how would you make this statement true?

False: continental crust is made of Granite & oceanic crust is made from Basalt. Back to Menu

What are the Metamorphic forms of Limestone, Shale, & Granite?

1.Marble 2.Slate 3.Schist / Gneiss Back to Menu

What are the 2 classifications of metamorphic rocks? Describe them.

Foliated & Non-foliated. Foliated has grains arranged in layers. Non-foliated has grains that are randomly placed. Back to Menu

What are 5 things that are most likely to change when a rock becomes Metamorphic?

1.Appearance 2.Texture 3.Crystal structure 4.Mineral composition 5.Density Final Jeopardy Back to Menu

What is the Rock Cycle?

An ongoing process at & beneath the surface that is constantly building and destroying rocks of all types. Back to Menu

True or False: the rock cycle only operates in one direction. Explain.

False: rocks can move along the rock cycle in any direction if the environment permits. Uplift can expose Igneous, Metamorphic or Sedimentary rocks at any time, and all rocks can be buried further under the surface. Back to Menu

What major type of rock would most likely have fossils? Why would the other types of rock not have fossils?

Sedimentary rocks. Igneous rocks come from molten material, so the fossils would be destroyed. Metamorphic rocks might contain fossils, but are less likely to. Back to Menu

Describe 2 ways an Igneous rock can become a Metamorphic rock.

Extrusive Can be Extrusive, gets weathered, compacted into Sedimentary rock, then buried deeper and metamorphose. Intrusive Can be Intrusive, remain buried, then undergo metamorphism. Back to Menu

Describe a texture associated with each major type of rock.

1.Igneous is notable for Porphyritic texture (large & small crystals) 2.Sedimentary rock like limestone is rich with fossils 3.Metamorphic rock often has layers Final Jeopardy Back to Menu

Fill in the missing steps

1.Weathering 2.Erosion 3.Sedimentary Rock 4.Heat & Pressure 5.Metamorphic Rock 6.Melting 7.Igneous Rock Back to Menu