What are the effects of tides Class 9?
The tides clear the waste and hence the coasts become clean. Due to tides, ports do not get filled with sediments. Ships can move up to the ports during high tide. During high tide, sea water can be stored in salt pans from which salt can be obtained.
What are the causes of tides Class 9?
What are tides in geography class 9?
How are tides caused Class 9 physics?
What is precipitation in geography class 7?
Answer: The sun’s heat vaporises water into vapour. This vapour cools down and condenses to become clouds. This may then fall on the surface of Earth in the form of rain, snow or sleet. This phenomenon of water falling back onto the surface of the earth in the form of rain, snow or sleet is called precipitation.
What makes ocean currents flow?
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. Currents are cohesive streams of seawater that circulate through the ocean.
What are the effects of ocean currents Class 11?
The mixing of warm and cold currents help to replenish the oxygen and favour the growth of planktons, the primary food for the fish population. The best fishing grounds of the world exist mainly in these mixing zones.
How do currents affect the temperature?
Currents affect the temperature directly. The warm currents raise and the cold currents lower the temperature of the neighbouring islands. The winds blowing over the cold current carry low temperature and have a cooling effect.
Does the sun affect tides?
Together, the gravitational pull of the moon and the sun affect the Earth’s tides on a monthly basis.
What are ocean currents 7 social sciences?
Answer: The streams of water flowing constantly on the ocean surface in a definite direction are called ocean currents. The ocean currents may be warm or cold.
What are ocean currents Class 9?
Ocean currents are streams of water flowing constantly on the ocean’s surface in definite directions. They are caused by differences in the temperature and salinity of water, by wind, solar heating and gravity. The winds majorly responsible for creating ocean currents are the Westerlies and the Trade winds.
Which of the following is a warm current?
The correct answer is Kuroshio current. Kuroshio current is a warm current. A north-flowing ocean current on the west side of the North Pacific Ocean is the Kuroshio current, also known as the Japan current.
What happens if the ocean currents stop?
If the current system collapses, it would lead to dramatic changes in worldwide weather patterns. If this circulation shuts down, it could bring extreme cold to Europe and parts of North America.
What is soil degradation Class 11?
Answer: Soil degradation can be defined as the decline in soil fertility, when the nutritional status declines and depth of the soil goes down due to erosion and misuse. Soil degradation is the main factor leading to the depleting soil resource base in India.
What are surges in geography class 11?
Surges: Movement of water caused by meteorological effects (winds and atmospheric pressure changes) are called surges. Tide generating force: The ‘tide-generating’ force is the difference between two forces; i. e. the gravitational attraction of the moon and the centrifugal force.
Why Pacific Ocean is cold?
It is produced by equatorial trade winds that blow from east to west, piling up warm surface water in the west Pacific, and also pushing surface water away from the equator itself. This makes way for colder waters to well up from the depths, creating the cold tongue.
How does a large body of water such as an ocean influence climate?
Large bodies of water, such as oceans, seas and large lakes, can affect the climate of an area. Water heats and cools more slowly than landmasses. Therefore, the coastal regions will stay cooler in summer and warmer in winter, thus creating a more moderate climate with a narrower temperature range.
What are tides 7?
Answer: The rhythmic rise and fall of ocean water, twice in a day, is called a tide. Tides are caused by the gravitational force exerted by the sun and the moon on the earth’s surface.
How was tide created?
High tides and low tides are caused by the moon. The moon’s gravitational pull generates something called the tidal force. The tidal force causes Earth—and its water—to bulge out on the side closest to the moon and the side farthest from the moon. These bulges of water are high tides.
How are spring and neap tides formed Class 7?
These tides are called spring tides. But when the moon is in its first and last quarter, the ocean waters get drawn in diagonally opposite directions by the gravitational pull of sun and earth resulting in low tides. These tides are called neap tides.
Why is ocean water salty?
Ocean salt primarily comes from rocks on land and openings in the seafloor. Salt in the ocean comes from two sources: runoff from the land and openings in the seafloor. Rocks on land are the major source of salts dissolved in seawater. Rainwater that falls on land is slightly acidic, so it erodes rocks.