The boundary between the land and the sea can be defined by the term ___________.

___________________ is not a major oceanic gyre.

The ‘West Wind Drift’ belongs to___________.

• Antarctic Circumpolar Current or West Wind Drift is the largest and most important ocean current in the southern hemisphere.

Other than wind, ______________is the most important factor that affects the movement of ocean water at the surface.

• Ocean currents are the continuous, predictable, directional movement of seawater driven by gravity, wind , Coriolis Effect and water density. 
• The Coriolis effect is strongest near the poles and is absent at the equator.

The Westerlies are__________.

• Westerlies are the Permanent winds that blow in the middle latitudes.
• The winds that change their direction with onsets of different seasons are called seasonal winds.
• Variable winds are those winds which blow in a small area and are related to the pressure systems.
• Mesoscale winds are better known as local winds or regional winds. These wind channels extend over long distances around the Earth.

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.

Ocean currents have_____________.

• By moving heat from the equator toward the poles, ocean currents play an important role in controlling the climate.

______ is defined as a movement of ocean water with a usual pattern.

Horizontal movement of ocean water due to wind on the surface of ocean is called

What is the effect of altitude on temperature? 

• Air at higher altitude is under less pressure than air at lower altitude because there is less weight of air above it.
• So it expands and cools.

________is the strongest evidence for climate change. 

The given image shows______________. 

_________is the Earth's slow vibration as it spins on its axis. 

• Eccentricity measures how much the shape of Earth's orbit departs from a perfect circle.
• The angle of Earth's axis of rotation is tilted as it travels around the Sun is known as obliquity.

_________explains the angle of tilt of the Earth's axis of rotation. 

The following image shows____________. 

• Precession is defined as the slow change in the direction of Earth's rotational axis.
• The angle of Earth's axis of rotation is tilted as it travels around the Sun is known as obliquity.

Changes of seasons are caused by____________.