EDS Notes for CSS-2015--UNIVERSE (complete) - Page 3

pisceankhan · #21 Saturday, July 05, 2014

Superb! apart from few mistakes

exclusively · #22 Saturday, July 05, 2014

Quote:

Originally Posted by pisceankhan

Superb! apart from few mistakes

Thanks and which few mistakes, can you please point out?

Thanks in anticipation

Nisbah Nazir Jutt · #23 Thursday, July 31, 2014

Excellent work Exclusively

Nisbah Nazir Jutt · #24 Tuesday, August 19, 2014

Quote:

Originally Posted by exclusively

• The Sun:

Introduction:
The sun is the star, which is nearest to the earth. It is the center of our solar system. All planets revolve round it.

Following are the main features of the Sun.
Composition of the Sun:
The Sun composed of: -
Hydrogen 90%
Helium 8%
Other elements 2%

Temperature of the Sun:
The Sun is a hot gaseous mass whose surface temperature is very gigh. The temperature of the Sun is divided into the following two types:

Photosphere: - The surface temperature of the Sun is called as the photosphere, that is 6000o C.

 Chromosphere: - The interior temperature of the Sun is called Chromosphere, that is about 15 million degree C.

Characteristics of the Sun:
The Mass of the sun is 2*1030 tons.
The diameter of the Sun is 1.4 million kms.
Its mean distance from the earth is 149 million kms.
The average density of the sun is 1.4 gm/cc.
The main source of energy in the sun is Hydrogen, which is coveted into Helium by the process of nuclear fusion.
The Sun has 27 days solar rotation period and 11-years sunspot cycle.
The Sun is classified as a ‘yellow dwarf’ star of spectral types G2V.
The minimum distance between sun & the Earth is known as perihelion, which is 147,098,200 kms & the maximum distance between the sun, & the Earth is called aphelion, that is 152,097,900 kms.

Some Features of the Sun:

Sun Spots:
Sun spots are a number of dark patches on the surface of the sun. They are seen through a telescope with colored glass. They are funnel-shaped vortex through which gaseous matter streams spiral upwards and outwards. The sun spots vary greatly both in size and duration. Some of them disappear in the course of a few days, others survive for one or two revolutions of the sun. Large spots may be more than 100,000 miles in diameter.

Solar Wind:
Solar wind is composed of protons and electron, which are streams of electricially charged particles, which are emitted by the Sun.

Isn't this temperature in kelvin? and also please clarify the mass

Nisbah Nazir Jutt · #25 Saturday, August 23, 2014

Is there anyone to answer the questions or is it useless to visit the forum now?

PACE Sahiwal · #26 Monday, September 01, 2014

Q.1 Select the best option and fill in the appropriate circle.

1. Who proposed the concept “All motion is relative”?
a. Albert Einstein
b. John Kepler
c. Galileo Galilie
d. None

2. The field of specialization of famous Muslim scientist Abu Usman Aljahiz was:
a. Botany
b. Zoology
c. Astronomy
d. None

3. Albatros is:
a. A sea bird
b. A beetle
c. A fruit
d. None

4. The sunlight can reach a depth of …….. meters in the ocean:
a. 100
b. 80
c. 120
d. None

5. The biggest planet in our solar system is:
a. Venus
b. Pluto
c. Jupiter
d. None

6. The biggest species of the cat family is:
a. Tiger
b. Lion
c. Leopard
d. None

7. Which group of animals has heterogametic females?
a. Domestic fowl
b. Earthworm
c. Rabbit
d. None

8. The dominant phase of life cycle in these organism is haploid:
a. Mosses
b. Bacteria
c. Protoza
d. None

9. The atmosphere of moon consists of:
a. 90% Hydrogen, 10% Nitrogen
b. 80%Nitrogen, 20% Hydrogen
c. 60% Nitrogen, 40%inert gases
d. None

10. The chemical name of quartz is:
a. Silicon Dioxide
b. Stannous Oxide
c. Aluminium Oxide
d. None

11. Which month of calendar year can lack a new moon?
a. December
b. February
c. May
d. None

12. Deuterium differs from Hydrogen in having:
a. Different atomic number but same atomic weight
b. Different atomic number and different atomic weight
c. Same atomic number and different atomic weight
d. None

13. One of the following is a water soluble vitamin:
a. Vitamin A
b. Vitamin D
c. Vitamin K
d. None

14. Coulomb is the scientific unit to measure:
a. Velocity
b. Temperature
c. Mass
d. None

15. Equator passes through one of these countries:
a. Saudi Arabia
b. Italy
c. Japan
d. None

16. Anti Diuretic hormone is secreted by one of the following glands:
a. Pituitary
b. Pancreas
c. Thyroid
d. None

17. Basha Dam is to be constructed on:
a. River Sutlaj
b. River Jhelum
c. River Chenab
d. None

18. UV light falls in the category of:
a. Ionizing Radiations
b. Non Ionizing Radiation
c. Visible light
d. None

19. The earth’s ……………….is divided into 15 major plates of various sizes:
a. Mesosphere
b. Stratosphere
c. Lithosphere
d. None

20. One of these scientists formulated basic laws of Geometry:
a. Pythagorus
b. Archimedes
c. Aristotle
d. None

mehrbatool · #27 Monday, September 01, 2014

Nice work

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The Following User Says Thank You to Nisbah Nazir Jutt For This Useful Post:
exclusively (Thursday, July 31, 2014)

The Following User Says Thank You to PACE Sahiwal For This Useful Post:
SAMEYA AROOJ (Monday, November 10, 2014)