The sustained heat within the Earth's interior is attributed to:
A) Radioactive Decay
B) Conduction
C) Convection
D) Isostatic Equilibrium
A
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Active solar heating systems involve
A. green roofs. B. pumping a heat-absorbing fluid through collectors on the roof. C. wind turbines with solar panels attached. D. foil sheets under the floor. E. adobe walls and windows that face the sun and store the collected solar energy.
Cities like Rio de Janeiro, Accra, Buenos Aires, Kolkata and other colonial cities emerged and grew due to
A) trade. B) industrialization. C) tourism. D) war. E) the rank-size rule.
Humus is not important to soil fertility.
Answer the following statement true (T) or false (F)
Which of the following strategies is NOT a good method to help an organism float?
a) Having many appendages to create drag b) Becoming larger c) Having a soft, low-density body d) Having a swim bladder e) Having a gas chamber inside a shell