Q1) Approximately __?__ percent of the Earth's surface (an area of some 361 million square kilometers) is covered by ocean


Q2) The world oceans heat the land and air during winter and __?__ it during summer.

Q3) The Earth's oceans are all connected to one another. True or False?

Q4) Until the year 2000, there were four recognized oceans: the Pacific, Atlantic, Indian, and Arctic. Name the fifth that was added in the Spring of 2000?

Q5) Seas are smaller branches of an ocean. True or False?

Q6) Ocean water is __?__ times saltier than the fresh lake water.

Q7) Scientists believe that the world's primeval oceans are as much as __?__ million years old.

Q8) Ocean water is indeed a complex solution of mineral salts and of decayed __?__ matter.

Q9) Tides are caused by the gravitational interaction between the Earth and the __?__.

Q10) Since the earth is rotating while this is happening, __?__ tides occur each day.