Paleontology Questions

Dikes, sills, veins, and fractures are features that can be used in the principle of _____ to determine the relative age of geologic events

Ancient rocks must be dated w/isotopes w/a _____ half-life

What happens to an asteroid or comet that creates a crater when it impacts a planet or moon?

The principle of _____ tells geologists that the oldest rock layer in the diagram is on the bottom; therefore, it was deposited first

The principle of original horizontality means that flat-lying sedimentary rocks have not been _____

Early Earth would have been inhospitable to many life-forms of today because the _____

Before radioactive decay occurs, there exist 200 parent atoms. After one half-life, there would be _____ parent atoms and _____ daughter atoms

The principle of inclusion states that the clasts within a conglomerate are _____ than the conglomerate

Both ____ dating and ____ dating can be used for correlation of the rock units shown in the diagram

Baking of rocks surrounding an igneous intrusion is called ____ effects

Order the isotopic systems from best for dating the youngest materials to best for dating the oldest materials

Preserved trackways and worm burrows in rock are examples of _____ ______

Which principle of relative dating can be used at Siccar Point in Scotland to determine that the rocks below the unconformity were tilted to vertical before erosion occurred?

_____ may form as erosion by a river further downcuts and widens a canyon, making a more intricate canyon formation

Isotopic dating allows scientists to assign numeric ages to rock using the natural _____ decay to certain isotopes

Name the materials that can be dated w/carbon-14 at archeology sites

About 2 billion years ago, ______had produced enough oxygen through photosynthesis to form a protective layer of ozone in the atmosphere

Buried erosion surfaces that represent large intervals of time are called ______

Fossils of species that lived on Earth for a long time period are often found in _____, whereas fossils of species that lived for a shorter time are found _____

River terraces are _____ than the age of the modern river channel