Fossils

Which of the following is NOT a way in which fossils are preserved?

• in amber
• frozen
• in asphalt
• trace

Fossils are most often preserved in what type of rock?

• sedimentary
• foliated
• igneous
• metamorphic

Sedimentary rocks are formed by the process of _____________________. 

• weathering and erosion
• heat and pressure
• compaction and cementation
• pushing and shoving

Fossils of organisms that existed for only a short period of time that show up ina  limited range of rock layers, such as trilobites, are called______________

• index fossils
• trace fossils
• cast fossils
• mold fossils

The remains of an organism that is often preserved in sedimentary rock is called what?

• sediment
• fossil
• cast
• rock

All of the following are true for index fossils except ____________.

• They are only dinosaur bones
• They are useful to geologists
• They only existed for a short period of time.
• They were found in lots of places.

The process of petrifaction can include which of the following: 

•  Living plants like trees can be submerged in water  
• Volcanic ash blows into the water
• Silica from the ash soaks into the wood, turning it to stone when it dries
• All choices are correct

The Law of Superposition helps scientists to determine what?

• The absolute age of rock layers
• The age of fossils
• The relative age of rock layers
• the super powers of rocks

According to the law of superposition, the oldest fossils are found 

• At the top of the rock layers
• Near the bottom of the rock layers
• In the middle of the rock layers
• Somewhat near the surface

What type of fossil is this?

• Mold
• Cast
• Preserved remains
• Trace fossil