S6E3 C & D Oceans

An oceanographer went into the ocean to measure the salinity at different areas.  

Where would you expect the oceanographer to find the highest salinity?

• Continental Shelf

• Continental Slope 

• Sea Mount 

• Trench

The model shows the features that scientists have identified on the ocean floor. About 20% of the ocean floor around the world has been mapped. Related to the model, which question do scientists want to know about the 80% of ocean floor that has not been explored?

• What tools are needed to explore the unmapped ocean floor?

• 
  Which are the deepest features of the unmapped ocean floor?

• 
  What changes have occurred to features of the unmapped ocean floor over time?

• What features does the unmapped ocean floor have that are shown in the model?

Based on the model, which is the correct order of seafloor features as you move from the shoreline to the deep ocean?

• 1: continental shelf

  2: continental slope

  3: abyssal plain

  4: mid-ocean ridge

  5: seamount

• 1: continental rise

  2: continental shelf

  3: abyssal plain

  4: seamount

  5: mid-ocean ridge

• 1: continental slope 

  2: continental shelf

  3: continental rise 

  4: mid-ocean ridge

  5: seamount

The composition of the oceans has been changing in recent years, as shown in the graph. The amount of carbon dioxide in the water is important because it forms a weak acid when absorbed by the seawater. Which statement communicates what has been happening to the oceans?

• Carbon dioxide in the atmosphere and seawater has increased, causing seawater to become less acidic.

• Carbon dioxide in the atmosphere and seawater has decreased, causing seawater to become less acidic.

• 
  Carbon dioxide in the atmosphere and seawater has increased, causing seawater to become more acidic.

• Carbon dioxide in the atmosphere and seawater has decreased, causing seawater to become more acidic. 

What is an ocean current?

• the movement of energy through water

• streams of seawater that circulate through the ocean

• the movement of water due to an earthquake under the water

• 
  the rise and fall of the ocean's surface caused by the forces exerted on the Earth by the moon and sun

Tide graphs are used to predict the tides in a specific area. The information they provide can be used by boaters, fishers, and people who plan to camp or hike along the coastline. What information is shown by the tide graph?

• the safest days to camp and hike at Cape Alava beach

• 
  the heights and times of the low and high tides for Cape Alava beach

• 
  the distance up the beach where the ocean water reaches at high and low tide

• 
  the influence of current weather and wind patterns on the high and low tides at Cape Alava beach

Kinley does research to find out the distance between the Earth and moon when low and high tides occur. According to the data, what is the cause of high tide?

• The position of the Earth, moon, and sun causes the bulge of water twice a day as the bodies move around each other at varying distances.

• The temperature of the water from day to night as the moon, Earth, and sun are in orbit at varying distances causes the bulge of water twice a day. 

• The moon's gravitational attraction for the Earth pulls the water toward it, causing a high tide when closest to the moon and a tidal bulge when furthest way.

• The Earth's gravitational attraction for the moon when closest is pulling the water toward it once a day and the other time of the day is due to a tidal bulge caused by inertia.

Which orientation of the Sun, Moon, and Earth would produce the highest ocean tide?

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