2.) Distinguish between numerical and relative dating 3.) What is the law of sup

Question

2.) Distinguish between numerical and relative dating

3.) What is the law of superposition? How are cross-cutting relationships used in relative dating?

4.) When you observe an outcrop of steeply inclined sedimentary layers, what principle allows you to assume that beds became tilted after they were deposited?

7.) List and briefly describe at least five different types of fossils.

8.) List two conditions that improve organism’s chances of being preserved as a fossil.

9.) Why are fossils such useful tools in correlation?

10.) What subdivisions make up the geologic time scale? What is primary basis for differentiating the eras?

Explanation / Answer

2. numerical dating can be defined as a dating method when we want to know a date in exact numbers for example dinasours where on earth around 15 million years back but in relative dating we do comparitive dating to set the chronological order as this event occur before or after this event

3. law of superposition says that in stratification the oldest strata is the last one. cross cutting helps to find out which layer was deposited before and after the fault

4) this is the principle of superposition

7) petrified wood:- these are woods turned into stones

mold and cast fossil:- organism dies and its body is covered with layers of sediments

but in cast there is some seepage of minerals becaue of ocean current

thin carbon film:- chemicals in oragnic form evaporates leaving behind a carbon film

impressions:- organism got burried in fine sediments leaving behind impressions of its presence

insects in amber:- insects remains attached in sticks plants timber/amber

8) rapd burial and possesion of hard parts

9) because they can help us to find the changes occured on earth at that time and how organism reacs to that time and also to find out the evolution pattern of species across the globe

10) the scale is based on significant global events that changes the whole structure and biosystem of the planet

period , rpochs and ages are the seqence in which scale is divided

Related Questions

Navigate

• Browse (All)
• Browse 2
• Subjects

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.