Without convection, there would be no volcanoes on Earth because
A) all the convecting material spurts out at the surface.
B) rising mantle material undergoes decompression melting.
C) molten outer-core melts the lower continental crust.
D) volcanoes sink down into Earth near down-going convention cells.
Question 2
Judge the following sentences according to the criteria given below. Ice cubes are dropped in a glass of warm water and float to the top. The ice cubes rose to the top of the glass of warm water because the frozen ice is colder than the warm water.
A) The assertion is correct but the reason is incorrect.
B) The assertion is incorrect but the reason is correct.
C) The assertion and the reason are both correct, and the reason is valid.
D) The assertion and the reason are both correct, but the reason is invalid.
E) Both the assertion and the reason are incorrect.
Uranus revolves around the Sun once every 84 Earth years. Its average distance from the Sun is rough
Uranus's aurorae against its equatorial rings, imaged by the Hubble telescope. Unlike the auror
Tides on Earth
Earth’s history is divided into nested sets of time--eons, eras, periods, and epochs--and is called
Earth 65 Million Years Ago
Condensing the Nuclear Material