What desert surface type is the classic “sea of sand”?
A. erg
B. reg
C. seif
D. hamada
E. basin
A
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A scientific theory is the first step in developing an idea. It is not very well tested
Indicate whether the statement is true or false
Which statement is true about continental crust?
A. It is composed of granitic-type rock and has the same density as oceanic crust. B. It is composed of basaltic-type rock and has a lower density than oceanic crust. C. It is composed of basaltic-type rock and has a higher density than oceanic crust. D. It is composed of granitic-type rock and has a lower density than oceanic crust. E. It is composed of granitic-type rock and has a higher density than oceanic crust.
In spite of the long hours of daylight in polar regions, why are summers are quite cool?
What will be the ideal response?
The stars Procyon and Betelgeuse both appear equally bright to Earthbound viewers. Yet Betelgeuse emits 5000 times more light than Procyon. Why do they appear to be equally bright?
A) because Betelgeuse is much farther than Procyon B) because Betelgeuse is undergoing fission, not fusion C) because Betelgeuse lies in the same plane of Earth's orbit D) because Procyon is superhot