Morning Star solutions for Total Geography [English] Class 9 ICSE chapter 11 - Hydrosphere [Latest edition]

Name the three ways in which the movement of ocean water takes place.

What are tides? 

Name one factor that causes tides.

What is the time interval between tides? Name the factors responsible for this time interval?

What are Spring and Neap tides?

Name two types of ocean currents based on their temperature.

For what is the Gulf Stream famous?

What happens when warm and cold currents meet?

What is meant by the ‘salinity’ of ocean water?

Name the factors responsible for the subsurface movement of ocean waters.

State the relationship between temperature and density of ocean water.

State one difference between waves and tides.

How do evaporation and precipitation cause movement of ocean water?

How is the rotation of the earth responsible for influencing the direction of currents?

Name the factors originating within the sea which cause ocean currents.

Give reasons for the following:

There are two high and two low tides in a day.

Give reasons for the following:

Each day a tide is delayed by 26 minutes.

Give a reason for the following: 

Warm currents produce a milder climate.

Give reasons for the following:

The eastern coasts of the USA are comparatively cold.

Give reasons for the following:

The waters of the Oyashio Current form the richest fishing grounds in the world.

Give reasons for the following:

There is heavy rainfall in Queensland but the Atacama desert is arid.

Give reasons for the following:

The coasts of Norway are not frozen in winter whereas its adjoining coasts are frozen for most parts of the year.

Give reasons for the following:

Rich fishing grounds are located on the Pacific coast of North America.

Differentiate between the three movements of ocean water-waves, tides, and currents.

Discuss the origin of tides. Illustrate the formation of Spring Tides.

Differentiate between High Tides and Low Tides.

Describing the types of ocean currents, state, and factors responsible for causing the currents.

Describe the circulation pattern of the following ocean current.

Labrador Current of the Atlantic Ocean.

Describe the circulation pattern of the following ocean current.

The Kuroshio current

Describe the circulation pattern of the following ocean current.

Oyashio Current of the Pacific Ocean.

Describe the circulation pattern of the following ocean current.

The North Atlantic Drift.

Trace the origin and flow of the Gulf Stream. What is the effect of this current on the coasts of North America and Western Europe?

Describe four major effects of currents.