The molecular formula of buckyball is ______________.
Fill in the blank(s) with correct word
[Ques. 2] The discovery of seafloor spreading led to acceptance of the theory of
a. plate tectonics.
b. volcanism.
c. convergence.
d. divergence.
[Ques. 3] Humphry Davy was able to discover six elements by using a new invention called the ______________.
Fill in the blank(s) with correct word
[Ques. 4] The lowest places on Earth's surface are called __________ trenches.
a. plateau
b. mid-oceanic
c. deep-sea
d. none of these
[Ques. 5] A(n) ______________ is a nonchemical combination of two or more substances in variable proportions.
Fill in the blank(s) with correct word
[Ques. 6] Remanent magnetism refers to the magnetism of rocks that contain the mineral named ______________.
a. magnetite
b. lodestone
c. pyrite
d. none of these
[Ques. 7] A(n) ______________ is a substance composed of two or more elements chemically combined in a definite, fixed proportion by mass.
Fill in the blank(s) with correct word
[Ques. 8] Seafloor spreading occurs along ______________.
a. fault lines
b. subduction zones
c. mid-ocean ridges
d. none of these
[Ques. 9] Matter can be defined as anything that ______________ ______________ and ______________ ______________.
Fill in the blank(s) with correct word
[Ques. 10] Alfred Wegener postulated that the continents were once part of a single supercontinent that he called ______________.
a. Pangaea
b. Africasia
c. Amerasia
d. Atlantis
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