Chapter 5 Oceans 4th Grade

Salinity is the —

• measure of all salts dissolved in water

• thick layers of sediment on the ocean floor

• mixing of waters at various temperatures

• runoff of sand, mud, and rocks into the ocean

Tags

NGSS.MS-ESS2-4

Based on the research notes shown,what is the student studying?

• The Gulf Stream

• Tides

• Tsunamis

• The Atlantic Ocean

Which ocean feature is found at the greatest depth?

• Continental shelf

• Abyssal plain

• An ocean trench

• Continental slope

Which explains how ocean currents are formed?

• Earthquakes shaking the ocean and erupting ocean volcanoes

• Wind patterns and temperature differences in the water

• Marine plant and animal population increases

• Typhoons and hurricanes that begin over open water

Tags

NGSS.MS-ESS2-6

At which of these depths is the salinity level the lowest?

• 3000 meters

• 0 meters

• 1000 meters

• 500 meters

What can you conclude based on the graph?

• Salinity increases steadily as depth increases.

• Salinity is highest at the surface.

• Salinity is highest on the continental shelf.

• Most depths of the South Atlantic Ocean have a salinity of 35.5%.

What is the approximate salinity at 1500m?

• 34%

• 35.5%

• 35%

• 34.5%

Which organism most likely lives at the greatest depth of the ocean?

• 
• 
• 
• 

Navigation routes are affected by –

• waves

• salinity

• currents

• tides

Tags

NGSS.MS-ESS2-6

What is the main cause of tides?

• Runoff from nearby land

• Melting icebergs and evaporation rates

• Moon’s gravitational pull

• Difference in temperature of ocean water

Tags

NGSS.MS-PS2-4