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Geography > Earth in Solar System > Flashcards

Earth in Solar System Flashcards

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1
Q

Galaxy includes

A 
5
Start Systems (gravitationally bound)
Stellar remnants
Dark matter
Dust
Interstellar gas
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2
Q

Most distant Galaxy

A

GN-211

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3
Q

When was GN-211 found

A

March 2016

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4
Q

Name of Classification used for Galaxies

A

Hubbles classification

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5
Q

What are Celestial bodies

A

sun, moon, Objects in Night Sky

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6
Q

celestial bodies - types

A
  1. that emit heat and light

2. that does not emit heat and light

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7
Q

Asteroid belt - between which two planets

A

mars and jupiter

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8
Q

whats a constillation

A

arrangement of stars/ group of stars

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9
Q

how many constillations

A

officially 88

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10
Q

2 major constillations

A

Ursa major and minor

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11
Q

big dipper indian name

A

saptarishi mandal

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12
Q

brightest star in big dipper/ saptarishi mandal

A

Alioth (tail)

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13
Q

polar star

A

north star

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14
Q

planets greek meaning

A

wanderers

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15
Q

classification of planets

A
  1. terrestrial

2. jovian

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16
Q

what are terrestrial planets

A

small and rocky

Mercury, venus, earth and mars

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17
Q

what are jovian planets

A

jupiter like - huge (giant planets)

jupiter, saturn, uranus, neptune

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18
Q

jovian planets - density

A

low

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19
Q

types of jovian planets

A
  1. gas planets (jupiter & saturn)

2. ice planets (uranus & neptune)

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20
Q

whats beyond neptune

A

kuiper belt

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21
Q

kuiper belt earlier known as

A

oort cloud

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22
Q

whats kuiper belt

A

belt of ice
similar characteristics of asteroids belt
numerous comets exist
has planet 9

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23
Q

major gases, components of kuiper belt

A

ammonia, methane, water

24
Q

recent status of Pluto

A

dwarf planet/ planetoid (since exist beyond kuiper belt)

has drifted away from sun’s orbit

25
Q

another name for dwarf planet

A

planetoid

26
Q

known planetoids

A

pluto
ceres (largest object in asteroid belt)
eris (largest dwarf planet)

27
Q

ceres

A

largest object in asteroid belt

28
Q

eris

A

largest dwarf planet

29
Q

proper name for geoid

A

oblate spheroid

30
Q

whats oblate spheroid

A

dif in height and width (not a perfect sphere)

flatter near the poles

31
Q

ranking of earth as per size

A

5th largest

32
Q

earth layers

A

crust, mantle, core

33
Q

crust composition

A

silica, alumina, lime (in order of proportion)

47% oxygen (silica and alumina has oxygen)

34
Q

mass of earth

A

iron 32%
oxygen 30%
silicon 15%

35
Q

rotation

A

spinning on the axis

36
Q

what does rotation of earth govern

A

day and night

37
Q

revolution

A

one complete round around sun

38
Q

what does revolution govern

A

seasons

39
Q

shape of earths path around sun

A

eliptical

40
Q

perihelion

A

3rd january

earth closest to sun

41
Q

aphelion

A

4th july

earth farthest from sun

42
Q

which planet has largest natural satellite in solar system

A

jupiter

43
Q

jupiters largest moon

A

ganyemede

44
Q

2nd largest moon in solar system

A

saturn

titan

45
Q

diameter of moon

A

1/4th of earth

46
Q

tidal phenomena

A

gravitational attraction between earth and moon

47
Q

moon’s distance from earth

A

384400 km

48
Q

classification of months

A
  1. sidereal

2. synodic

49
Q

sidereal month

A

the time it takes the moon to orbit once around the earth with respect to the stars (approximately 27 1/4 days).

50
Q

synodic month

A

the synodic month, or lunar month, is longer than the sidereal month.
wrt to sun
same visual phase
29.53 days

51
Q

indias missions to moon

A

chandrayaan I and II

team indus

52
Q

whats team indus

A

unmanned spacecraft to moon

aim 2018

53
Q

asteroids

A

small rocky elements

exist bet mars and jupiter

54
Q

meteoroids

A

small particles
move around sun
can drop on earth
when they drop - friction - flash of light

55
Q

comets

A

ice bodies
move due to solar radiations and solar vent
have tail
tail always points away from sun

56
Q

pulsars

A

neutron star
with a strong magnetic field
emit electro magenetic radiations

Geography (2 decks)

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