Recycling steel is more energy-efficient than recycling aluminum
What will be an ideal response?
In energy terms, this is not correct. However, both are efficient in both economic
and energy terms.
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The first small solid grains or flakes formed in our solar system by the process of ____, the addition of material to an object an atom or molecule at a time
a. Accretion b. Sublimation c. Hydration d. Condensation e. Vaporization
What is the "runaway greenhouse effect"?
What will be an ideal response?
Earth's internal layers were discovered by studying the propagation of P- and S- waves through Earth's interior. In comparison to P-waves, the movement of S-waves are
A) faster and compresses and expands the rock as they move through it. B) faster and vibrates rock particles up and down and side-to-side. C) slower and can travel through solid granite, magma, water or air. D) slower and they can only travel through solids, not liquids.
Type II supernovae are believed to occur when the cores of massive stars collapse
a. True b. False Indicate whether the statement is true or false