Rocks

Before metamorphism, marble was what type of rock?

• schist

• rock salt

• siltstone

• limestone

How are clastic rocks classified?

• method of depostition

• particle size

• mineralogy

• metamorphic grade

What are the two types of weathering?

• erosion and physical

• erosion and chemical

• cementation and chemical

• physical and chemical

What do different grades of metamorhpic rocks reflect?

• compaction only

• pressure only

• temperature and cementation

• pressure and temperature

What processes aid in the formation of sediments?

• erosion only

• deposition and solidification

• weathering and metamorphism

• weathering and erosion

What kind of weathering breaks rocks into smaller pieces of rock without chemical change?

• erosional weathering

• chemical weathering

• clastic sediments

• physical weathering

A glacial deposit often is

• unsorted

• cross-bedded

• well-sorted

• rippled

Why are sedimentary rocks important?

• they provide many natural resources and evidence of Earth's past

• they provide building stones

• they contain fossils

• they contain gemstones of high value

Symmetrical ripples are the result of sediments being moved _____

• in a circular direction

• in a forward direction

• in a backward direction

• in a back and forth motion

Pieces of preexisting rock are called

• minerals

• sediments

• atoms

• rocks