the Hubble Space Telescope is put into orbit by SpaceShuttle in
1970
1980
1990
1993

a space-based global navigation satellite system, provides reliable location and time information in all weather and at all times and anywhere on or near the Earth, GPS

• used by car owners, hikers, tourists
• 4 or more satellite system(at this time 24 military satellites circling the earth at an altitude of 11,000 miles such that at any given time and location a GPS receiver gets a signal from at least 6 of those satellites at a time.)
• developed in the 1970s and was owned, operated and controlled by the United States military , (but now general public can use it)
• all

blood of the astronaut will boil in space, if he goes there without space suit, as there is no
gravity
force
motion
air pressure

cellular telephone used for first time in
1980
1977
1965
1987

there are ....... dwarf planets
5
4
3
6

protons and neutrons are made of
neutrinos
alpha
beta
quarks

rayleigh scattering refers to
blue color scattering in sky
rain clouds
silviculture
forests

pelagic zone refers to
open air
open ocean(deep ocean)
ecosystem of pond
zone of danger

capra falconeri is
chakoor
markhor
bulbul
koyal
goat type found in mountains

only.......% light reaches the earth
2
10
20
50