The scientific theory for the origin of our solar system, involving the condensation and collapse of

interstellar material in a spiral arm of the Milky Way galaxy, is the ____________________ theory. Fill in the blank(s) with the appropriate word(s).


solar nebula

Environmental & Atmospheric Sciences

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The first fish evolved about 50 million years ago. Indicate whether the statement is true or false

Environmental & Atmospheric Sciences

Which of the following is most porous?

a. sand b. soil c. gravel d. silt e. clay

Environmental & Atmospheric Sciences

The infectious disease that poses the greatest risk of death for people living in northern Eurasia and Africa is

A) tetanus. B) measles. C) tuberculosis. D) hepatitis.

Environmental & Atmospheric Sciences

In what climate(s) is solifluction prevalent?

A) Topics B) Tundra and subarctic C) Arid D) Temperate and humid

Environmental & Atmospheric Sciences