During alpha emission, the mass number is reduced by ________ and the atomic number is decreased by ________
A) 2; 4
B) 4; 2
C) 3; 6
D) 6; 4
Answer: B
Environmental & Atmospheric Sciences
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Fill in the blank(s) with the appropriate word(s).
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What is the name of the supercontinent proposed by Alfred Wegener?
A) Pangaea B) Rodinia C) Amasia D) Nuna
Environmental & Atmospheric Sciences
Normally, solar wind approaches Earth at an average speed of ____
a. ?300 km/sec b. ?400 km/sec c. ?500 km/sec d. ?100 km/sec e. ?1000 km/sec
Environmental & Atmospheric Sciences
Why is the inner core expanding?
A) crystallization B) vaporization C) melting D) condensation
Environmental & Atmospheric Sciences