Fossils provide evidence about past life and environmental conditions. They can be preserved through mineralization, mummification, freezing, or as traces or molds/casts. Fossils show changes over time, with older rock layers containing different organisms than younger layers. Radiometric dating allows scientists to determine the precise ages of rocks and fossils by measuring radioactive decay, providing the most accurate dates. The principles of superposition and succession allow fossils and rock layers to be relatively dated based on their positions.
Francesca Gottschalk - How can education support child empowerment.pptxEduSkills OECD
Francesca Gottschalk from the OECD’s Centre for Educational Research and Innovation presents at the Ask an Expert Webinar: How can education support child empowerment?
Biological screening of herbal drugs: Introduction and Need for
Phyto-Pharmacological Screening, New Strategies for evaluating
Natural Products, In vitro evaluation techniques for Antioxidants, Antimicrobial and Anticancer drugs. In vivo evaluation techniques
for Anti-inflammatory, Antiulcer, Anticancer, Wound healing, Antidiabetic, Hepatoprotective, Cardio protective, Diuretics and
Antifertility, Toxicity studies as per OECD guidelines
Synthetic Fiber Construction in lab .pptxPavel ( NSTU)
Synthetic fiber production is a fascinating and complex field that blends chemistry, engineering, and environmental science. By understanding these aspects, students can gain a comprehensive view of synthetic fiber production, its impact on society and the environment, and the potential for future innovations. Synthetic fibers play a crucial role in modern society, impacting various aspects of daily life, industry, and the environment. ynthetic fibers are integral to modern life, offering a range of benefits from cost-effectiveness and versatility to innovative applications and performance characteristics. While they pose environmental challenges, ongoing research and development aim to create more sustainable and eco-friendly alternatives. Understanding the importance of synthetic fibers helps in appreciating their role in the economy, industry, and daily life, while also emphasizing the need for sustainable practices and innovation.
How to Make a Field invisible in Odoo 17Celine George
It is possible to hide or invisible some fields in odoo. Commonly using “invisible” attribute in the field definition to invisible the fields. This slide will show how to make a field invisible in odoo 17.
Operation “Blue Star” is the only event in the history of Independent India where the state went into war with its own people. Even after about 40 years it is not clear if it was culmination of states anger over people of the region, a political game of power or start of dictatorial chapter in the democratic setup.
The people of Punjab felt alienated from main stream due to denial of their just demands during a long democratic struggle since independence. As it happen all over the word, it led to militant struggle with great loss of lives of military, police and civilian personnel. Killing of Indira Gandhi and massacre of innocent Sikhs in Delhi and other India cities was also associated with this movement.
Model Attribute Check Company Auto PropertyCeline George
In Odoo, the multi-company feature allows you to manage multiple companies within a single Odoo database instance. Each company can have its own configurations while still sharing common resources such as products, customers, and suppliers.
Acetabularia Information For Class 9 .docxvaibhavrinwa19
Acetabularia acetabulum is a single-celled green alga that in its vegetative state is morphologically differentiated into a basal rhizoid and an axially elongated stalk, which bears whorls of branching hairs. The single diploid nucleus resides in the rhizoid.
Palestine last event orientationfvgnh .pptxRaedMohamed3
An EFL lesson about the current events in Palestine. It is intended to be for intermediate students who wish to increase their listening skills through a short lesson in power point.
Instructions for Submissions thorugh G- Classroom.pptxJheel Barad
This presentation provides a briefing on how to upload submissions and documents in Google Classroom. It was prepared as part of an orientation for new Sainik School in-service teacher trainees. As a training officer, my goal is to ensure that you are comfortable and proficient with this essential tool for managing assignments and fostering student engagement.
5. Fossils in Amber
►When tree sap hardens, an insect may be
preserved inside. Hardened tree sap is
called amber. Some of our best insect fossils
are found in amber.
6. Mummification
►When organisms die in dry places (such as
deserts), they can sometimes dry out so
fast that there isn’t enough time for their
soft parts to decay.
9. Molds and Casts
►A mold is a cavity in the ground or rock
where a plant or animal was buried.
►A cast is an object created when sediment
fills a mold and becomes rock.
10. Fossils Show
Changes in Environments
►Fossils can reveal changes that have
occurred in parts of the Earth.
►How did sea creatures
end up on dry land?
11. Fossils Show
Changes in Life
►Older rock layers contain
organisms different from
those found in younger
rock layers.
►Life forms have changed
over millions of years.
For example, giant sea
reptiles came before
giant land dinosaurs.
Mammals arrived last!
12. ►47) A fossil is a remnant or trace of an
organism from the past, such as a skeleton
or leaf imprint.
14. ►49) A Trace Fossil is a fossil of a footprint,
trail, burrow, or other trace of an animal
rather than of the animal itself
15. ► 50) A footprint of an ancient animal in a
rock is called a trace fossil.
16. ►51) Large animals occasionally became
trapped in tar and become a fossil.
17. ►52) Fossils, the
remains of
organisms
preserved in
sedimentary
rocks, are part of
the evidence
scientists use to
infer changing
conditions at the
Earth’s surface
through time.
18. ►53) Oil and Natural Gas are formed from
ocean plankton that died millions of years
ago.
20. ►55) Petrified wood is a fossil.
►
►56) Petrified wood forms when water with
natural minerals slowly fills the pores of
wood. Over thousands of years the wood
slowly decomposes leaving behind the
minerals from the water. The minerals
harden and form a rock that looks exactly
like the original wood.
21. ► 57) How much wood is actually located in
petrified wood? 0%.
22. ►58) The
geologic
column is how
geologists
have
organized the
entire history
of the Earth in
chronological
order.
23.
24. ROCKS TELL A STORY
► Rocks can tell where they
were made and when
► Sedimentary rocks can
have fossils in them
► Rocks can tell when mass
extinctions happened
25. LAW OF SUPERPOSITION
For undisturbed rocks, the oldest layer is on
the bottom and the youngest is on top (Supai
is oldest)
27. LAW OF SUCCESSION
► Fossils are found in a predictable sequence
► Fossils in rock B are older then fossils in rock A
28.
29.
30.
31. RELATIVE DATING & AGE
► Relative Dating:
putting rocks and
geological events in
correct chronological
order
► Relative Age: how old
something is in
comparison to
something else
► HOW?
Use of sedimentary rocks
Use of fossils
Study of strata
32. Absolute Dating
► Absolute dating is a
process that
establishes the precise
age of an object, fossil,
or rock layer by
determining the
number of years it has
existed.
► Radiometric dating
is how absolute dating
is accomplished.
Scientists determine
the actual age of a
fossil or rock by
measuring the decay of
certain atoms.
33. ►60) Radiometric dating is how geologists
determine the age of rocks by measuring
the decay of atoms.
