Oceans Study Guide & Review Worksheet

An ocean is a large body of __________ that borders large land masses.

• water

• sand

• ice

• forest

Approximately _____% of Earth's surface is covered by the five oceans.

• Approximately 71% of Earth's surface is covered by the five oceans.

• Approximately 60% of Earth's surface is covered by the five oceans.

• Approximately 50% of Earth's surface is covered by the five oceans.

• Approximately 80% of Earth's surface is covered by the five oceans.

3. Much of the ocean floor is covered in __________ or thick layers of sand, mud, and bits of rocks.

• sediment

• coral

• seaweed

• shells

4. __________ is the measure of salt dissolved in water.

• salinity

• temperature

• density

• viscosity

5. True/False: Read each statement. Write 'T' if it is true or 'F' if it is false. - Ocean trenches are very deep parts of the ocean. - Salinity decreases as the depth of water increases. - The ocean floor is flat. - The depth of the ocean affects the amount of light and temperature. - Most marine organisms are found in the continental shelf.

• Ocean trenches are very deep parts of the ocean.

• Salinity decreases as the depth of water increases.

• The ocean floor is flat.

• The depth of the ocean affects the amount of light and temperature.

• Most marine organisms are found in the continental shelf.

Use the letters in the map below to label the major geographic features of the ocean.

• __________

• continental slope

• __________

• continental shelf

• __________

• abyssal plain

• __________

• ocean trench

• __________

• continental rise

7. The ocean feature considered to be the true ocean floor is:

• Continental Shelf

• Abyssal Plain

• Mid-Ocean Ridge

• Oceanic Trench

What percentage of Earth's surface is covered by oceans?

• 50%

• 60%

• 70%

• 80%

Which of the following is not one of the five major oceans?

• Arctic Ocean

• Atlantic Ocean

• Indian Ocean

• Mediterranean Sea

A 'marine' ecosystem is:

• a terrestrial ecosystem found in deserts.

• an aquatic ecosystem found in oceans and seas.

• a forest ecosystem found in tropical regions.

• an ecosystem found in freshwater lakes.