Seasons are caused by ____
A) changes in the weather
B) annual variation in the energy output of the sun
C) Earth's orbital tilt relative to the plane of its orbit around the sun
D) our being closer to the sun in summer
C
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Which of the following groups is most likely to disrupt local ecosystems as they search for natural resources and manufacturing sites?
A) international organizations such as the United Nations B) governments C) non-governmental organizations, such as Greenpeace D) indigenous ethnic groups E) transnational firms
In which of the following settings would a breath of air contain much fewer molecules than a breath of air taken at sea level?
A. standing at the top of a 7000 metre-high mountain B. on the roof of a high-rise building C. standing at the top of a hill D. in an underground cave
The Agricultural Revolution began in the Middle East around 15,000 years ago
Indicate whether the statement is true or false
Confining pressure results from the ________ of rocks
A) uplift B) erosion C) melting D) burial