When a river capture occurs, the beheaded stream is called the?

A. pirate

B. gap

C. elbow

D. misfit

The world's principal fishing regions are located on continental shelves where?

A. there are no noticeable ocean currents meet

B. there are cold ocean currents

C. there are no warm ocean currents

D. cold and warm currents meet

What do the Canaries and Guinea currents have in common?

A. They are warm currents

B. They are cold currents

C. They wash the western coast

D. They flow away from the equator

After condensation, the rate of cooling of a rising air mass decreases because it becomes?

A. stable

B. lighter

C. denser

D. warmer

The critical temperature at which the air being cooled becomes saturated with vapor is known as the?

A. condensation trail

B. relative humidity

C. dew point

D. wet adiabat

Plant growth normally ceases, when the temperature falls below?

A. 0°C

B. 6°C

C. 10°C

D. 15°C

A soil sample consisting of 49% sand, 28% silt and 23% clay is classified as?

A. sand

B. loam

C. sandy clay

D. clay

Iron deposit is a natural resource when it occurs?

A. in high concentrations

B. with few impurities

C. in economic quantities

D. in sedimentary formations

The fundamental role played by the decomposers in the functioning ecosystem is the?

A. diposal of plant ana animals waste products

B. releases of energy and nutrients locked up in organic litter

C. precipitation of organic and mineral elements from the soil

D. cycling of water and chemical elements

In the hydrological cycle, the transfer of water from the earth surface to the atmosphere is by?

A. precipitation

B. infiltration

C. evaporation

D. condensation