100% satisfaction guarantee Immediately available after payment Both online and in PDF No strings attached
logo-home
Previously searched by you
Previously searched by you
logo
Summary - Biology Ecology notes $11.82   Add to cart
Quickly navigate to
Preview
  2.  
  3. 12th Grade

Summary

Summary - Biology Ecology notes
 11 views  0 purchase
  • Course
  • Institution
  • 12th Grade

These notes provide and in-depth analysis of the topic and ensure easy understanding. There are definitions, diagrams and pictures to ensure you achieve your best marks possible. This is coming from and A student and therefore this is a highly reliable study source/option. Enjoy and study h...

[Show more]

Preview 1 out of 3  pages

Document information

  • November 9, 2023
  • 3
  • 2023/2024
  • Summary

Subjects

  • top study notes

Written for

  • 12th Grade
  • Unknown
  • 200

Seller

avatar-seller
jordanhopewright

Content preview

Biology
Ecology Notes


Dating the layers:
1) Hyraceum (OK)
- Dssie poo.
- Dassie urine and faeces are formed in mounds.
- Carbon dating gives accurate dates. (lower & middle layers)
- This preserves plants, pollen and many other creatures.
- Allows a researcher to go back roughly 4000 yrs from present.

2) Dendrochronology (OK)
- Uses tree rings.
- Tree rings are laid down seasonally based on conditions affecting
the trees and therefore treesthat were alive at the same time period
have same pattern.
- Uses computer programs to map the ring patterns of trees all over
- Fragments of fossil tree can be sectioned and their age read using a
backward stepping library of rings patterns from all trees.
- Makes use of the oldest orgaism on the planet the Bristlecone Pine,
over 4000 yrs old.
- Method allows to go back 135000 yrs.

3) Relative Dating
- Relies on the fact that all fossil deposits are layered.
= TOP layers are the youngest & lower layers get older and older
- These fossils are called TYPE fossils…
= Fossils that occur ONLY in one layer of the fossil record to identify
the layers that we are looking at.
=
- The layer is then dated to the age that we know that fossil represents
from other, more reliably dated layers in which that fossil occurs.

4) Radio Carbon Dating (ABSOLUTE)
- A half-life method using the half-life of carbon 14.
- Carbon 14 is a radioactive isotope of Carbon 12.
- C14 decays into C12 and the quantity can be measured & worked
backwards to the point where the carbon was laid down.
- This type of dating is accurate for short-term time lines of
approximately 1 M years.
After that it becomes inaccurate.

The benefits of buying summaries with Stuvia:

Guaranteed quality through customer reviews

Guaranteed quality through customer reviews

Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.

Quick and easy check-out

Quick and easy check-out

You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.

Focus on what matters

Focus on what matters

Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!

Frequently asked questions

What do I get when I buy this document?

You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.

Satisfaction guarantee: how does it work?

Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.

Who am I buying these notes from?

Stuvia is a marketplace, so you are not buying this document from us, but from seller jordanhopewright. Stuvia facilitates payment to the seller.

Will I be stuck with a subscription?

No, you only buy these notes for $11.82. You're not tied to anything after your purchase.

Can Stuvia be trusted?

4.6 stars on Google & Trustpilot (+1000 reviews)

72964 documents were sold in the last 30 days

Founded in 2010, the go-to place to buy study notes for 14 years now

Start selling
$11.82
  • (0)
  Add to cart