Section one: USA states by number of presidents born
Section two: World desert map
Section three: USA historical events
1927
Warner's released The Jazz Singer, which had synchronized dialogue (and singing) in a feature film.
Section four: world historical events
100 BC in China paper was invented in China.
In 105 AD Ts’ai Lun ( during the Han dynasty) was the first to start a paper-making industry.
In 105 AD Ts’ai Lun ( during the Han dynasty) was the first to start a paper-making industry.
Section five: Quarks Facts
1. Particle physics / high energy physics)
is a branch of physics dealing with the nature of the particles (smallest
detectable ) that constitute matter and radiation.
2. The Standard Model is the
dominant theory explaining these fundamental particles and their interaction.
3. Quarks and Leptons are the "elementary
particles" which are the basic building blocks of matter.
4. There are six flavors or types of quarks (up,
down, charm, strange, top, bottom).
5. Mesons are particles of intermediate mass
and they are made up of pair of quark and antiquark. Three quark combinations
are called baryons. Proton and neutron, build from up and down quarks are the
most common quarks.
6. Quarks appear only in mixture of two quarks
7. The baryon number is one-third the
difference between number of quarks and antiquarks. Baryons which has two
quarks and one antiquark have a baryon number of 1 and meson have a
baryon number of 0
8. The most popular quarks are the up and down
quarks and they have the least mass because they make up protons and neutrons.
·
1.
Type
|
Sign
|
Charge
|
Up
|
U
|
+2/3
|
Down
|
D
|
-1/3
|
Charm
|
C
|
+2/3
|
Strange
|
S
|
-1/3
|
Top
|
T
|
+2/3
|
Bottom
|
B
|
-1/3
|
Section six: quiz
QUESTIONS
Which is the world’s highest navigable lake?
ANSWERS
Lake Titicaca ( border between Peru and Bolivia )
