________ was a supercontinent that existed in the late Paleozoic era of geologic time
A) Gondwanaland
B) Pangaea
C) Rodinia
D) Columbia
Answer: B
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Sectionalism is a helpful way of characterizing and understanding the competition between cities—and how they can be played off of each other—for a major league sports franchise or major employer
Indicate whether this statement is true or false
Why can't we see atoms?
A) We see with light energy and the wavelength is larger than the object and so it is not reflected. B) Atoms are invisible. C) We cannot see things that are microscopic. D) We see with light energy but the atoms absorb all the light and therefore there are no reflections. E) Atoms do not interact with light energy and therefore we are unable to observe them with light.
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
What percentage of temperate forests cover Europe today?
A) 5% B) 15% C) 20% D) 75% E) 95%