Explore topic-wise InterviewSolutions in Current Affairs.

Chinese tourist Fahiyan visited India during the regime of Chandragupta II.

Navratnas of Chandragupta II’s court included- Poet Kalidas, Amar Singh, Ghatkarpar, Dhanvantri, Shanku, Varahmihir, Khashpanak, Vetal Bhatt and Varruchi.

(d) Chandragupta II

Emperor Ashoka’s Dhamma was associated with the moralistic education imparted by him to the people.

The water level on the part of the earth facing the moon rises. The rise in water level due to the gravitational pull exerted by the moon leads to high tide. You might have noticed that the water level at the opposite side also has risen. The centrifugal force due to the earth’s rotation is the reason for the rise in water level here. It can be seen that the water level goes down at places located 90° away from the places of tidal influence. This is due to the draining of water towards the tidal regions. The phenomenon of fall of water level is known as low tide.

The Intensity of waves is defined as the power delivered per unit area. The unit of intensity will be W.m². The wave energy comes from simple harmonic motion of its particles. The total energy will equal the maximum kinetic energy. As intensity of waves increases the wavelength also increases.

Mudbank is a phenomenon that develops in the Arabian Sea during the onset or the end of the monsoon season. Planktons grow luxuriantly in the turbulent muddy water along the seashore during the monsoon rains. Schools of fish such as shrimp, sardine, and mackerel arrive to feed on the planktons and the mud, giving fishermen a good catch. This phenomenon is known as mud bank.

It is a type of seawater movement. Ocean currents are the continuous flow of seawater from one direction to another. They can be classified as warm currents and cold currents. Warm currents are the currents that flow from the tropical or subtropical regions towards the polar or subpolar regions. The water that flows in will be warmer than the water at the destination.

Similarly, cold currents are the currents that flow in from the polar or the subpolar regions towards the tropical or subtropical regions. In this case, the water that flow in will be colder than the water at the destination. The temperature and salinity of seawater varies from ocean to ocean. This difference leads to density difference in seawater. The difference in density is one of the factors that cause ocean currents.

Nearly 71% of earth’s surface area is covered with water.

Between 10° latitudes on either side of the equator

• Iron ore
• Coal
• Petroleum
• Natural gas

• Depositing boulders along the seashore.
• Construction of interlocking concrete structures (Pulimuttu)
• Planting of mangroves.

Seismic sea waves or tsunami waves.

• Cyclones
• Shelving of shores

(i) Wave crest 

(ii) Wave trough 

(iii) Wavelength 

(iv) Wave height

1. Wave Length 

2. Crest 

3. Wave height 

4. Trough

The friction exerted by winds on the ocean surface

Correct answer is: a) Increases

The up and down motion of the water along the surface of the sea is called sea waves.

Answer is Mumbai High

Variation in the amount of insolation received on the earth is the major reason, The Ocean currents and winds also influence the temperature of seawater.

• Japan 
• Peru 
• China 
• Norway 
• USA

Marine organisms help in production of :-

• antibiotics 
• steroids 
• vitamines

Answer is B & C are not related

• Salinity will be more in landlocked seas.
• Salinity increases in areas of high evaporation.
• Salinity decreases in areas where snow meltwater reaches in large quantity.
• Salinity decreases at river mouths.
• Heavy rainfall leads to reduction in salinity.

The concentration of salt content in seawater is known as salinity.

Salinity is less at river mouths because of huge amount of freshwater added from hundred of rivers.

The density of seawater is not uniform everywhere. This is due to the variations in salinity and temperature of sea water. Density decreases as temperature increases, and it increases as salinity increases. You have understood that the temperature, salinity and the density of seawater are not uniform everywhere. These variations lead to movements in seawater.

• Sodium chloride
• Magnesium chloride
• Magnesium Sulphate

• Waves
• Tides
• Ocean currents

Correct answer is: b) 3.5%

• Influence the climate of coastal regions.
• Fog develops in the regions where warm and cold currents meet.
• The regions where the warm and cold currents meet provide favorable conditions for the growth of fish.

The rise in the level of ocean water is the high tide and the lowering of the water level is known as the low tide.

The temperature is high in equatorial regions compared to polar regions. Density increases as temperature rises. High density is associated with high salinity. There is possibility of high evaporation in equatorial regions. That is why equatorial regions record high amount of salinity.

• Temperature 
• Salinity 
• Density

a) The Pacific Ocean 

b) The Atlantic Ocean 

c) The Indian Ocean 

d) The Artie Ocean 

e) The Antarctic Ocean

High tides and low tides have many effects. Let’s have a look at them.

• The debris dumped along the seashores and ports are washed off to the deep sea.
• The formation of deltas is disrupted due to strong tides.
• Brackish water can be collected in salt pans during high tides.
• The fishermen make use of the tides for going and returning from the sea in catamarans.
• Tidal energy can be used for power generation.
• Ships can be brought to shallow harbors during high tides.

Tides are formed as a result of the gravitational pull exerted by the moon and the sun along with the centrifugal force due to the earth’s rotation.

Tides are he periodic rise and fall of water level in the ocean.

The rise in water level due to the gravitational pull exerted by the moon leads to high tide. Tides can occur as two high waters and two low water each day. The tides are occurred by the gravitational. The moon’s gravity pulls the ocean surface closer to it and the moon makes two trips around the earth each day. Hence there in high tide twice a day.

Influence of Oceans in human life Oceans play significant role in the life of human beings. We cannot neglect oceans because oceans are useful in

• Influencing our climate.
• Providing mineral deposits.
• helping power generation.
• Providing source of food.

(d) Chandragupta II

The period of Morya Empire was from fourth century BC to second century BC.

(a) Chandragupta Morya

Dhamma Mahatamyas were religious teachers who were appointed by Ashoka to impart moralistic education to people.

Ashoka was the follower of Buddhism.

(c) In 269 BC

Emperor Ashoka constructed roads, hospitals, dharamshalas and planted shadowy trees on the sides of the roads for the benefit of his people and animals.

Most of the scriptures of Ashoka have been written in Prakrit language.