Geosci 103 Review Sheet

Geosci 103 Review Sheet - LECTURE 1 Why is paleontology...

Info iconThis preview shows pages 1–4. Sign up to view the full content.

View Full Document Right Arrow Icon
LECTURE 1 Why is paleontology called a ‘four-dimensional’ science? It deals with time, which is the 4 th dimension What did the word ‘fossil’ originally mean? “Things dug up” What is the difference between a body fossil and a trace fossil? Body fossils are remains that preserve some of the “body” of an ancient organism. Trace fossils are remains that preserve some “trace” or “mark” produced by an organism during its life, on an inert or organic substrate What is a fact? A hypothesis? A theory? A fact is an objective and verifiable observation made about the natural world. A hypothesis is a general explanation of facts; makes predictions that can be tested A theory is a hypothesis that has withstood repeated testing What is the tree of life? What is at the tips of the twigs, and what is at the branch points? At twigs are species antecedents are at the branches How does natural selection work? Survival of the fittest, darwinism, etc etc What is extinction? If methods and laws of comparative anatomy showed fossil to be distinct from living forms, and the longer is no longer in existence, then it is extinct Are few, some, many, most animals that once existed now extinct? Most, over 99%
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
What is the difference between relative dating and absolute dating? Relative dating is when you know the age of a certain rock layer by comparing fossils. Some methods include: Superposition, original horizontality, lateral continuity, faunal succession, and cross cutting relationships, absolute dating is knowing exactly how old a fossil is What is superposition? Oldest rocks on bottom, youngest on top How do cross-cutting relationships help us to order events? The geologic feature which cuts another is the younger of the two features How old is the earth? 4.55 billion years What is plate tectonics? A theory that explains the global distribution of geological phenomena such as seismicity, volcanism, continental drift, and mountain building in terms of the formation, destruction, movement, and interaction of the earth’s lithospheric plates What are the types of rocks? Sedimentary, igneous, metamorphic How does human history fit into earth’s history? At the very end What is the general pattern of continental fragmentation during dinosaur era? Landmasses became progressively isolated Lecture 3
Background image of page 2
What is DNA and where is it stored in your body? DNA is the hereditary material of all living things, DNA is stored on the chromosoms
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 4
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 12/12/2010 for the course BIO 173 taught by Professor Amerlaan during the Spring '10 term at Central Mich..

Page1 / 10

Geosci 103 Review Sheet - LECTURE 1 Why is paleontology...

This preview shows document pages 1 - 4. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online