Water

Question 1

What is water cycle?

Answer 1

It is the process when water continually changes form and travels from oceans to the atmosphere and comes back to land

Question 2

what is salt?

Answer 2

Sodium Chloride is common table salt

Question 3

Describe Dead sea

Answer 3

Salinity of 340 grams, located in israel, swimmers can float because of its dense nature

Question 4

Sources of fresh water

Answer 4

Lakes, ponds, rivers, glaciers, springs , groundwater

Question 5

What are waves?

Answer 5

This is the continous rise and fall of water on the ocean surface.

Question 6

Why are waves formed

Answer 6

They are formed when the wind scrapes on the water, the stronger the wind the higher the waves

Question 7

Why are Tsunami’s called so?

Answer 7

Tsunami’s are called so as it is Japanese for Harbour waves as the harbour always gets destroyed when a large tsunami comes.

Question 8

Why does tsunami occur

Answer 8

When an earthquake or a landslide comes under water then a large amount of water is displaced, this results in a huge wave which are typically between 15-150m and can go upto 700 kmph.

Question 9

What was the 2004 tsunami?

Answer 9

The 2004 tsunami caused widespread destruction in the coastal areas and completely submerged the southern most point of India, Indira Point located in Andaman and Nicobar island.

Question 10

What are tides?

Answer 10

They are the Rhythmic rise and fall of water that happens twice a day.

Question 11

What happens during the high tide?

Answer 11

The water covers most of the shore

Question 12

What happens during low tide

Answer 12

The water recedes from the shore

Question 13

Why are tides Caused?

Answer 13

They are caused by the strong gravitational pull of the Sun and The Moon

Question 14

Why are spring tides caused

Answer 14

These are caused when the moon, sun and the earth are in a straight line. The gravitational pull of the sun and the moon combined results in the highest tides.

Question 15

what happens to the low tides and the high tides in the spring tide

Answer 15

The the low tides are lower and the high tides are higher.

Question 16

When does Spring tide happen(according to the moon)

Answer 16

Full moon and the new moon day

Question 17

When are neap tides caused

Answer 17

Caused when the Sun and the Moon form a right angle.

Question 18

What happens in a neap tide

Answer 18

The ocean water is drawn in diagonally direction, This happens when the moon is in its first and third quarter. It results in higher low tides and lower high tides.

Question 19

What are Ocean currents?

Answer 19

They are streams of water flowing constantly on the ocean surface in definite directions

Question 20

Name the types of Ocean currents

Answer 20

Cold currents and warm currents.

Question 21

Generally from where do the cold and warm currents start

Answer 21

The warm currents start from the equator and move toward the poles. The cold currents carry water from the polar or higher latitudes to tropical or lower latitudes.

Question 22

give one example of cold current

Answer 22

Labrador

Question 23

WHat do ocean currents influence

Answer 23

Temperature conditions of the area.

Question 24

give one example of war current

Answer 24

gulf stream

Question 25

What happens where the warm and cold currents meet

Answer 25

Best fishing grounds. Seas around Japan and the Eastern coast of North America are such examples. Foggy weather makes it difficult for navigation.

Question 26

How do Tides make some rivers Navigable?

Answer 26

Tides Make some river navigable as during the high tide the depth of water at the mouth of some rivers increases and this helps ships reach the ports located on those rivers

Question 27

Why are desserts mostly found along the western sides of the continent along where cold currents flow?

Answer 27

Desserts are found along the western side of the continents along which cold currents flow. This is because the cold currents decrease the moisture bearing of the winds, which results in dry wheather.

Question 28

Why are the places where the cold and the warm currents meet prone to accidents, still they are popular among fisher men

Answer 28

The places where the warm and the cold currents meet are prone to accidents, as the mixture of cold and warm currents causes dense fog, which is dangerous. It is still popular among fisherman as they are the best fishing groups in the world.

Question 29

why do ocean currents influence the distribution of temperature on the globe?

Answer 29

Ocean Currents influence the distribution of temperature over the globe as the warm and the cold currents increase or decrease the temperature of the coastal areas.

Question 30

how do tides prevent the siltation of harbours?

Answer 30

Tides help prevent the siltation of harbours as they help clear the sediments deposited by rivers on their beds.

Question 31

How to Ocean currents help in navigation

Answer 31

Ocean currents help in navigation as the ship as the ship sailing along a current will go faster thus saving time and fuel.

Question 32

How do tides help the fishing industry?

Answer 32

Tides Help the fishing industry as- 1. the high tides bring the fishes near to the coast 2. The fishermen sail out in the open sea during low tide and comeback with high tides.

Question 33

List the importance of tides

Answer 33

1. Tides makes some rivers navigable for ocean during high tides as the depth of water the the mouth of the rivers increases. This helps the ship to reach the port located on those rivers. For example Kolkata port on river Hugli and London port on river Thames. 2. Tides help to clear the sediments deposited by rivers on their beaches preventing siltation of harbours. 3. During High tides, saline water is stored in low laying areas, this helps to make common salt. 4. The fishing industry is helped by the rhythm of tides during the high tide as the fish come to the shore, the fishermen mostly sail out to the open sea and return to the coast with high tides. 5. The Energy of tides is used to generate electricity.

Question 34

Effects of Ocean Currents

Answer 34

Ocean currents exercise great influence on the climate and economic activities of the coastal areas as- 1. They influence the distribution of temperature over the globe, the warm an cold currents increase the temperature of the coastal areas. 2. Warm Currents increase the moisture bearing capacity of the wind, while the cold currents decrease the same, deserts are found along the western side of the continents, along which the cold currents flow. 3. The mixing of cold and warm currents causes dense fog, which hampers navigation. 4. The best fishing grounds of the world are found where warm and cold currents meet. For example Japan and New Found land. 5. Ocean currents help in navigation as the ship sailing along a current will go faster thus saving time and fuel. 6.Warm currents help in keeping the sea port ice free, so that it can remain open throughout the year, even in the high latitudes 7, Warm currents reduce, the danger of icebergs for the sailing ships.