Early organisms played a role in the accumulation of free oxygen through the process of ____________________

Fill in the blank(s) with correct word


photosynthesis

Environmental & Atmospheric Sciences

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The four main Native American culture groups of Poverty Point, Mississippian, Hopewell, and Adena are collectively known as _______ _____ civilizations. Historically, they were located in the eastern half of the United States

Fill in the blank(s) with correct word

Environmental & Atmospheric Sciences

Friction between the moving tide wave and the turning Earth acts to ________.

A. increase the free wave speed of the tide wave B. All of the answers are correct. C. slow the rotation rate of Earth and make the tide wave move as a forced wave D. make no difference to Earth's rotation and wave speed

Environmental & Atmospheric Sciences

Africa is the only region of the world where per capita food production has declined for about the last 50 years

Indicate whether the statement is true or false

Environmental & Atmospheric Sciences

Which nation in Southeast Asia remained uncolonized throughout the colonial period?

A) Laos B) Cambodia C) Burma D) Thailand E) Vietnam

Environmental & Atmospheric Sciences