A. False. It is also made up of Gutenberg discontinuity,Mohorovicic Discontinuity,Hydrosphere & many othersPS: The crust is also called Lithosphere.
B. True. Metamorphic rocks are created by the physical or chemical alteration by heat and pressure of an existing igneous or sedimentary material into a denser form
C. True.
D. True. Formed by crystallizing melted material (magma)
E. True.
Sorry for the long explanations. Hope it helps!! :)
Answer:
it is said that the Ice Ages began 2.4 million years ago and ended approximately 11,500 years ago.
Explanation:
During this time Carbon-Dioxide (a poisonous and warming gas) levels rose dramatically by about 180 ppm to 280 ppm.
This caused the major retreat of glaciers that ran across continents...
There were other gases but they were in VERY small amounts...
(APART FROM OXYGEN)
The correct Answer is A. Crude oil and coal together account for more than half of the world’s energy.
