World coal reserves are more abundant than oil or natural gas
Indicate whether the statement is true or false.
Answer: TRUE
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What texture is displayed by the igneous rock in this photograph?
A) Vesicles
B) Breccia
C) Porphyritic
D) Glassy
E) None of these are correct.
Why do long periods of sitting or standing cause our legs and ankles to swell?
What will be an ideal response?
In international transactions (imports and exports) the seller receives payment in the currency of the purchasing country
Indicate whether the statement is true or false
Spreading centers have relatively peaceful eruptions of magma because the ________.
A. Olivine-poor magma has a high-volatile content. B. SiO2-poor magma is at high temperatures. C. SiO2-rich magma is at a temperature just above the melting point of quartz. D. Olivine-rich magma has a high viscosity.