Origin of earth - big bang hypothesis, PL-SQL Programming

Assignment Help:

ORIGIN OF EARTH -

BIG-BANG HYPOTHESIS -

Origin of life is linked to origin of earth.
Cosmos, the Universe originated 10-20 billion years ago by Big Bang (thermonuclear explosion).
Its part, a galaxy, (e.g., our Milky Way) comprises millions of stars, (our Sun is one of those).
Sun, its planets and satellite constitute the solar system.
Our earth is the 3rd planet with rocks, water & atmosphere.
It began as gaseous clouds of metals and non-metal atoms, later condensed to form surface rocks and boiling fluid core with gaseous atmosphere.

Chronology of events
Origin	Ago (Billion yrs)
Universe	10-20
Solar system	4.6
Earth	4.5
Oldest surviving rock	4.3
Life (Heterotrophs)	4.2-3.9
Old rock	3.9
Chemosynthetic procaryotes	3.8-3.5
Oldest microfossils (Cyanobacteria)	3.3-3.5
Photosynthetic procaryotes	3.5-3.3
Eukaryotes	1.6-1.5

NEBULAR HYPOTHESIS -

Earth is formed by gradual condensation of interstellar dust, from which our entire solar system is presumed to be formed.

Related Discussions:- Origin of earth - big bang hypothesis

Multiset types - sql, Multiset types - SQL An SQL multiset is what in ...

Multiset types - SQL An SQL multiset is what in mathematics is also known as a bag-something like a set except that the same element can appear more than once. The body of an

Union without corresponding - sql, UNION without CORRESPONDING - SQL T...

UNION without CORRESPONDING - SQL The use of UNION without CORRESPONDING. Example is merely by omitting CORRESPONDING, but only because the operands have identical SELECT clau

Logical connectives - sql, Logical Connectives - SQL SQL's extended t...

Logical Connectives - SQL SQL's extended truth tables in which the symbol, for unknown, appears along with the usual T and F. Negation (NOT, ¬) Conjunction (

Oracle PL SQL, I need to write one function and one procedure to query a Or...

I need to write one function and one procedure to query a Oracle 10.1 DB using PL SQL. I have the schema and exact queries...along with work Ive started and a template to put the a

Using host arrays - bulk bind performance improvement, Using Host Arrays ...

Using Host Arrays The Client-side programs can use anonymous PL/SQL blocks to bulk-bind input and output host arrays. However, this is the well-organized way to pass the colle

Maintain an audit trail of product table changes, The accuracy of product t...

The accuracy of product table data is critical and the Brwebean's. owner wants to have an audit file that contains information regarding all DML activity on the BB_PRODUCT table. T

Biochemical origin of life - modern concept, BIOCHE M ICA L ORIGIN OF LI...

BIOCHE M ICA L ORIGIN OF LIFE - It is generally agreed by astronomers, geologists and biologists that the earth is approximately 4500-5000 million years old. It is an

Data types in sql - integer, Data Types in SQL - Integer INTEGER or s...

Data Types in SQL - Integer INTEGER or synonymously INT, for integers within a certain range. SQL additionally has types SMALLINT and BIGINT for certain ranges of integers. T

Develop a job management site, Lightweight system to provide and take info ...

Lightweight system to provide and take info from workers in the field and office, have basic design outlined already just require build and implementation Desired Skills CSS,

Write sql queries, Write SQL queries to solve the following specifications....

Write SQL queries to solve the following specifications. Include the query AND THE OUTPUT. A screen dump of the output is acceptable. Show as many rows as you can. A screen dump i

Write Your Message!

Name

Email id

Message

Verfication Code

User Account

All Pages