Science- Earth Changes & Oceans

A mid-oceanic ridge might be compared to what continental landform?

• delta

• great plains

• mountain range

• mountain valley

Tags

NGSS.MS-ESS2-3

The continents do not end at the shoreline. Land forms continue under the sea extending from the continental shelf to the deep ocean floor with a vast variety of life. Choose a list of terms describing land forms found on the ocean floor.

• continental shelf and slope, mid-ocean ridge, rift zone, trench, and the ocean basin

• continental rise and shelf, continent, ridge, canyon, trench, and typhoon

• tectonic plates, continental slope, island, mountain, reef, and the ocean barrier

• continental shelf, ocean basin, mountain ridge, rise, and tidal wave

If you walk out into the ocean, you will see that the land covered by ocean water slopes very slowly away from the coastline. This gently sloping land close to the shore is known as the continental shelf. Further out from the shore, the drop off steepens as it descends to meet the deep ocean floor. This steeper portion of the sea floor is known as the continental slope. Together, the continental shelf and the continental slope are a part of the

• continental drift.

• continental margin.

• continental divide.

• continental United States.

In the picture of the ocean floor, letter C marks what landform?

• rift zone

• ocean trench

• deep ocean basin

• continental shelf

Which of these oceanic landforms is similar to a canyon?

• valley

• seamount

• ocean trench

• the mid-ocean ridge

How can you BEST describe the continental shelf?

• The continental shelf is very deep.

• The continental shelf is the same width around the edges of the continents.

• The continental shelf is the part of the continent located above the water.

• The continental shelf is an extension of the continent under the ocean water.

In the oceans the colder water sinks into deep basins, while warmer water stays closer to the surface. The water then moves around the ocean basin. This causes-

• tidal waves.

• wind drifts.

• ocean currents.

• plate tectonics.

Tags

NGSS.MS-ESS2-4

NGSS.MS-ESS2-6

Which factor MOST directly affects the flow of ocean currents?

• differences in pressure

• differences in temperature

• Earth's revolution round the Sun

• the Moon's revolution round Earth

Tags

NGSS.MS-ESS2-6

Which statement BEST describes why warm ocean currents are usually surface currents?

• A. Warm water is less dense than cold water.

• B. Ocean tides bring warm water to the surface.

• C. Warm water contains more salt than cold water.

• D. Ocean water loses heat to the air at the surface.

Tags

NGSS.MS-ESS2-6

Which of the rock types are likely to be found in Virginia's rivers?

• coal

• igneous

• metamorphic

• sedimentary