science question and need the explanation and answer to help me learn.
Q. The Sun’s mass is mainly consist of hydrogen. The second main constituent of the Sun’s mass is
(A) argon
(B) nitrogen
(C) carbon dioxide
(D) helium
The answer is:
Q. What play an important role in determining the hottest temperature the human body can tolerate?
(A) altitude
(B) humidity
(C) pollution
(D) type of gasses
The answer is:
Q. Transformers are used to change ________ voltage levels.
(A) alternating current
(B) direct current
(C) circuit
(D) none of these
The answer is:
Q. What type of rocks are formed when continental plates collide with each other?
(A) igneous rocks
(B) sedimentary rocks
(C) metamorphic rocks
(D) marble and onyx
The answer is:
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