The plates and the upper part of the mantle come together to form a layer is called__________.

Which of the following is formed by Oceanic Plates?

• There are seven major plates-
• African, Antarctic, Eurasian, Indo-Australian, North American, Pacific and South American.

At the boundaries the magma reaches to the surfaces and formation of ridges take place on which area?

• Where plates converge, one plate may move under the other causing earthquakes, forming volcanoes, or creating deep ocean trenches.
• Where plates diverge from each other, molten magma flows upward between the plates, forming mid-ocean ridges, underwater volcanoes, hydrothermal vents, and new ocean floor crust.

The boundary where two tectonic plates come together is called___________.

• A divergent boundary occurs when two tectonic plates move away from each other.

When the heated Magma flow onto the surface of Earth all through the fracture, cracks, and volcanoes, it is called as___________.

• Lava is the hot molten magma that reaches the Earth's surface through cracks and crevices during a volcanic eruption.
• This cools down and solidifies below the Earth's surface or on it to form rocks.

The word 'Tectonics' comes from __________.

The ________________ flows along the East Coast of North America till it is bounced to the right by westerly winds.

• The Gulf Stream is a strong ocean current that brings warm water from the Gulf of Mexico into the Atlantic Ocean.

________is the strongest evidence for climate change.

Select the currents that flow from lower latitudes to higher latitudes.

Salinity in ocean water decrease when_____________.

• Near the equator, the tropics receive the most rain on a consistent basis. As a result, the fresh water falling into the ocean helps decrease the salinity of the surface water in that region.
• As we move toward the poles, the region of rain decreases and with less rain and more sunshine, evaporation increases.

Select the correct statement about Gulf Stream.

Why the maximum temperature of the ocean is always at its surface?

• The heat is transmitted to the lower sections of the oceans through the mechanism of conduction.

__________ is not a cause of generation of ocean currents.

What change can be seen in living things as climate change?

Ocean currents can be triggered by __________.

• Ocean currents can be caused by wind, density differences in water masses caused by temperature and salinity variations, gravity, and events such as earthquakes or storms.

Mainly Ocean currents are_____________.

• Ocean currents can be caused by-
• Wind, density differences in water masses caused by temperature and salinity variations, gravity, and events such as earthquakes or storm.