Magma consists of oxides of silicon, aluminum, magnesium, iron, calcium, sodium and potassium. Why is this so?
A) They are all heavy elements located beneath the surface of the earth.
B) They are all attracted to heat.
C) They all have low melting points.
D) They are all oxides.
Question 2
Igneous rocks are overwhelmingly composed of silicate minerals. Why is this so?
A) Silicates are very heavy.
B) Silicates compose a huge amount of the earth's crust.
C) Silicates are only found in igneous rocks.
D) Silicates are very rare.
Iron deficiency anemia blood cells.
(a) The relative age ranges of different dating techniques depend upon the half-life of the system u
Sodium Channel Blockers
(a) In normal nerve conduction, sodium ions (Na+) enter the sodium channels along a neuron and ...
Normal depolarization of the motor end plate: (a) Depolarization: Ach causes calcium to be released ...
Breakfast cereals rich in iron, vitamin D and vitamin B-12