What is often found in the middle of manganese nodules?
A) Microtektites
B) Shark teeth or bone fragments
C) Living bacteria
D) None of these choices
B
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Solar radiation is ________, as compared to the ________ emitted by Earth.
A) long-wave radiation; short-wave radiation B) short-wave radiation; long-wave radiation C) infrared radiation; visible light D) heat; electromagnetic radiation
An argillic soil horizon is enriched in clay moved from the A horizon
Indicate whether the statement is true or false
Botswana, Lesotho, and Swaziland have more problems associated with HIV than other African countries
Indicate whether the statement is true or false
Which of the following greenhouse gases is also destroying the ozone layer?
A) Carbon dioxide (CO2) B) Chlorofluorocarbons (CFCs) C) Methane (CH4) D) Nitrous oxide (N2O) E) Water vapor