no, it isn't. the largest known thing in space is star VV Cephei, what is 1600 times larger then Sun. the Sun is 109 times larger then earth, so the largest star is 174400 times larger then Earth.
no. it is of the smaller ones. In order of size Earth is the fifth largest planet. Jupiter, Saturn, Uranus and Neptune are all larger.
Yes. Earth is the largest Terrestial planet.
Yes!
Mauna Loa
Learn About Earth
China Green Lights Programme
Learn About the Work of IRRI
Greenpeace: Apple is the Least Eco-friendly Tech Company