Which of the following terms refers to the change of state of water from a liquid to a vapour?

A. condensation
B. evaporation
C. freezing
D. sublimation


Answer: B

Environmental & Atmospheric Sciences

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List the main advantages of using topology-based data sets in GIS.

What will be an ideal response?

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Tropical rainforest canopies are generally

A) a two-layer canopy that is thickest in its upper layer and thinnest in its lower layer. B) a two-layer canopy that is thickest in its lower layer and thinnest in its upper layer. C) a three-layer canopy that is thickest at the ground level. D) a three-layer canopy that is thickest in its middle layer. E) a one-layer canopy.

Environmental & Atmospheric Sciences

Agenda 21 was an agreement by

A. 300 nations to limit trade in endangered species in 1985. B. 90 nations to enhance global biodiversity in 2000. C. seven nations to halt CFC production in 1987. D. 178 nations for comprehensive sustainable development in 1992.

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Which of the following parts of an atom has a negative charge?

a. Proton b. Neutron c. Electron d. Hydrogen

Environmental & Atmospheric Sciences