Hydrosphere

As the ocean water temperature decreases, the amount of oxygen _____.

• decreases

• increases

• remains the same

• neither decreases nor increases

What could probably happen to a water table if a pumping well operates for a long period of time during drought?

• It will fall.

• It will rise.

• It will remain the same.

• It will rise, then fall afterwards.

Water from aquifer is cleaner compared to water from other sources. Why?

• it becomes clean when fresh and saltwater meet

• it comes directly from precipitation

• it rises to the surface near the ocean

• it is filtered by the rocks and soil

Which statement correctly compares river basins and watersheds?

• There are many watersheds that drain into a river basin.

• There are many river basins that drain into a watershed.

• Both river basin and watershed are the same.

• Only a few areas are drained by river basins while others are drained by watersheds.

Which organism serves as the foundation of sea life?

• dolphin

• phytoplankton

• zooplankton

• whale

What happens to life forms living in an estuary if the nutrients in it increases?

• life forms increase

• life forms decrease

• life forms remain the same

• life forms neither increase nor decrease

The productivity in a marine ecosystem is limited due to the availability of ______ and _______.

• light and nutrients

• light and salinity

• light and chemosynthetic organisms

• photosynthetic organisms and fresh water

Among the freshwater given, which is the primary source in the hydrosphere?

• groundwater

• lakes

• glaciers and ice caps

• ocean

Which characteristics do a rock must possess in order for it to become an aquifer?

• porous yet impermeable

• non-porous and impermeable

• porous and permeable

• non-porous yet permeable

If you are to conduct a deep ocean research, which will benefit the economy the most?

• hydropower

• oil resources

• new habitats

• medicine