Ch 1. The Earth And The Universe

Question 1

Earth was formed how many billion years ago ?

Answer 1

4.5 billion years ago

Question 2

Who gave Big Bang Theory and in which year ?

Answer 2

Georges Lemaitre in 1931

Question 3

Big Bang took place how many years ago ?

Answer 3

13.8 billion years ago

Question 4

Nearest galaxy to our Milky Way is ?

Answer 4

Andromeda Galaxy

Question 5

The Black hole of Milky Way is called ?

Answer 5

Saggitarius A* (or) AY Star

Question 6

What are the Inner planets/Solid planets/Terrestrial planets of the Solar System ?

Answer 6

Mercury, Venus, Earth and Mars

Question 7

What are the Outer planets/Gaseous planets/Jovian planets of the Solar System ?

Answer 7

Jupiter, Saturn, Uranus and Neptune - The Gas Giants

Question 8

What is the surface temperature of the Sun ?

Answer 8

6000°C

Question 9

What is the interior temperature of the Sun ?

Answer 9

20 Mn.°C

Question 10

What is Heliosphere ?

Answer 10

The volumn of space constrained by the sun’s magnetic feild is known as the heliosphere

Question 11

What are solar winds ?

Answer 11

These are the storms of electrically charged gas blowing outward from the sun in every direction

Question 12

What is Parker spiral ?

Answer 12

The Sun’s rotation causes the magnetic feild streamlines to assume a spiral shape, known as the Parker Spiral

Question 13

The inner planets are made of ________ elements

Answer 13

Iron, Silicon, Magnesium, Sulfur, Aluminium, Calcium and Nickel

Question 14

Who declared that Pluto is a Dwarf planet and in which year ?

Answer 14

International Astronomical Union (IAU), in 2006

Question 15

Which planet is called Earth’s twin ?

Answer 15

Venus

Question 16

Which planet is called Morning star and Evening star ?

Answer 16

Venus

Question 17

Largest volcano and the tallest mountain in the solar system is ?

Answer 17

Olympus Mons

Question 18

Largest moon of Jupiter is ?

Answer 18

Ganymede

Question 19

The moons of Mars are ?

Answer 19

Phobos and Deimos

Question 20

Largest moon of Saturn is ?

Answer 20

Titan

Question 21

Which planets are called the ice giants ?

Answer 21

Uranus and Neptune

Question 22

Which planets are called the twins of the outer solar system ?

Answer 22

Uranus and Neptune

Question 23

Period of revolution of Mercury is ?

Answer 23

88 days

Question 24

Period of revolution of Venus is ?

Answer 24

225 days

Question 25

Period of revolution of Mars is ?

Answer 25

2 years

Question 26

Period of revolution of Jupiter is ?

Answer 26

12 years

Question 27

Period of revolution of Saturn is ?

Answer 27

29 years

Question 28

Period of revolution of Uranus is ?

Answer 28

84 years

Question 29

Period of revolution of Neptune is ?

Answer 29

165 years

Question 30

what is a meteoroid ?

Answer 30

Rocky or metallic fragment of an asteroid, comet or planet

Question 31

What is a meteor ?

Answer 31

Streak of light seen when a meteoroid heats up in the atmosphere

Question 32

What is a meteorite ?

Answer 32

meteor fragment that reaches the ground

Question 33

What is a comet ?

Answer 33

Icy body surrounded by frozen gases. It orbits the Sun

Question 34

What is Kuiper Belt ?

Answer 34

It is a circumstellar disc in the outer Solar System. It's one of the places where comets come from.

Question 35

What are the three largest asteroids ?

Answer 35

Ceres, Pallas and Vesta

Question 36

What are asteroids?

Answer 36

Rocky body smaller than a planet that orbits the Sun (does not orbit planet like a moon)

Question 37

Who first predicted the existence of Black holes and in which year ?

Answer 37

Albert Einstein with his general theory of relativity in 1916

Question 38

Halley's comet can be seen for every ____ years and it was last seen in ?

Answer 38

75-79 years, 1986

Question 39

Equatorial circumference (in miles) of the Earth is ?

Answer 39

24,897 miles

Question 40

Who made the first voyage around the world and in which years ?

Answer 40

Sir Ferdinand Magellan in 1519 - 22

Question 41

what is revolution speed of the Earth ?

Answer 41

30 Km/sec

Question 42

What is the rotation speed of the Earth at the equator ?

Answer 42

460 m/sec

Question 43

When is the Winter and Summer Solstice ?

Answer 43

22nd December and 21st June

Question 44

When is Spring equinox and Autumn equinox ?

Answer 44

21st March and 21st September

Question 45

When is Perihelion and Aphelion ?

Answer 45

Early January and early July

Question 46

Average distance between two latitudes is ?

Answer 46

69 miles

Question 47

Distance between two longitudes at the equator is ?

Answer 47

69 miles

Question 48

How many degrees (longitudes) are covered in one hour of Earth's rotation ?

Answer 48

15