Rocks and Rock Cycle

A rock that contains fossil seashells was most likely formed as a result of?

• Volcanic activity
• Sedimentation
• Heat and pressure
• . Magma and cooling

Sedimentary rock is formed when grains of sediment undergo

• metamorphism
• compaction and cementation
• melting
• solidification

Which of the following set of characteristics best describes sedimentary rocks?

• crystal structure, definite chemical composition, inorganic, naturally occurring, solid
• glassy, lava flow, porphyritic, vesicular
• dull, fossils, rock pieces, strata
• foliation, index minerals

¿Qué debe pasar con los sedimentos para que se conviertan en roca?

• meteorización, erosión y deposición

• compactación y cementación

• fusión, enfriamiento y solidificación

• calor y presión

Cuando las rocas sufren erosión, intemperie, compactación y cementación, se convierte en:

• magma

• roca ignea

• roca sedimentaria

• conos volcanicos

The diagram show layers of sedimentary rocks and examples of their fossils. Which layer contains the oldest fossils?

•  Layer 1
• Layer 2
• Layer 3
• Layer 4

What are strata?

• mineral fragments
• minerals crystallized out of solution
• fossils in sedimentary rock
• layers in sedimentary rock

What kind of sedimentary rock is made of fragments of rocks cemented together by a mineral?

• organic
• stratified
•  chemical
•  clastic

What kind of sedimentary rock is made from solutions of dissolved minerals and water?

• organic
• chemical
• stratified
• clastic

What kind of sedimentary rock is made from fossils?

• organic
• stratified
•  chemical
• clastic