Most abundant color in Earth is_________?
A. Blue B. Green C. Brown D. Black
A. Blue B. Green C. Brown D. Black
A. Sedimentary rocks B. Metamorphic rocks C. Igneous rocks D. All of the above
A. 160 million km B. 140 million km C. 150 million km D. 130 million km
A. Messier 81 B. Andromeda C. Triangulum D. Whirlpool
A. 16.5 billion years B. 15.5 billion years C. 13.5 billion years D. 14.5 billion years
A. 4.14 billion years B. 4.64 billion years C. 4.54 billion years D. 4.34 billion years
A. 4.51 billion years B. 4.55 billion years C. 4.53 billion years D. 4.57 billion years
A. 4.4 billion years B. 4.5 billion years C. 4.6 billion years D. 4.7 billion years
A. Hydrogen B. Helium C. Nitrogen D. Flourine
A. Stratosphere B. Troposphere C. Mesosphere D. Thermosphere