The Mesozoic is known as the Age of Reptiles because
a. no mammals had yet evolved.
b. no birds had yet evolved.
c. Paleozoic invertebrates had all gone extinct.
d. reptiles were highly diverse and filled many niches.
e. amphibians evolved into small body sizes.
D
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Proved reserves of a nonrenewable energy source are ________
A) the extent of known energy reserves B) quantities of fuel that can be recovered using current technology and prices C) reserves that will be exhausted due to overuse by humans D) measures of useful energy produced E) refined and captured but not able to be reused
Weathering refers specifically to the physical (mechanical) processes that break down rocks and doesn't include the chemical processes that breakdown rocks
Indicate whether the statement is true or false
If a mineral is opaque, lustrous, malleable and can conduct heat and electricity, it is a(n) ________
A) crystal B) element C) metal D) radioactive element E) gemstone
Cyclonic flow is ____________ in the Southern Hemisphere and ____________ in the Northern Hemisphere.
a. counterclockwise; clockwise b. counterclockwise; counterclockwise c. clockwise; counterclockwise d. clockwise; clockwise