What is magma?
a. the molten mixture of rock-forming substances, gases, and water from the mantle..
c. hardened lava on the surface of the earth.
b. liquid rock that reaches the surface.
d. all of the above?

Answer : The correct option is, (a) the molten mixture of rock-forming substances, gases, and water from the mantle.

Explanation :

Magma : It is the molten or the semi-molten state or a mixture of natural material, gases and the water from which all igneous rocks are formed.

Magma is very hot liquid rock that is found below the surface of the earth. When it flows onto the surface of the earth then it is called as lava. There are three types of magma which are basaltic, andesitic and the rhyolitic.

The formation of magma from the melting solid rocks is controlled by the three parameters which are pressure, temperature and compositions.

Hence, the correct option is, (a) the molten mixture of rock-forming substances, gases, and water from the mantle.

2h2o2--> 2h2o + o2

this reaction is of the spontaneous decomposition of hydrogen peroxide down into water and oxygen.

add 2 molecules of hydrogen peroxide and 2 molecules of water. since oxygen is naturally diatomic, the total number of atoms of each element is now the same on both sides of the equation so it is balanced.

this may not be entirely correct but let me know.

answer: a tank of height h is filled with water and sits on the ground. water squirts from a hole at a height y above the ground and has a range r. for two y values, 0 and h, r is zero. determine the value of y for which the range will be a maximum.

explanation: