The document discusses the hydrosphere, which is the total amount of water on a planet. It includes water on the surface, underground, and in the air. On Earth, the hydrosphere includes oceans, lakes, rivers, groundwater, ice caps, and water vapor in the atmosphere. Water moves through the hydrosphere via the water cycle of evaporation, precipitation, and collection. The hydrosphere plays an important role in maintaining Earth's atmosphere and climate.
The Stars And The Galaxies In The Universe 2 Lguest2dc5cb
This powerpoint slidesare from form 3 sallabus and it is about stars and galaxies. Students are allowed to view and upload their ideas of stars and galaxies.
The Stars And The Galaxies In The Universe 2 Lguest2dc5cb
This powerpoint slidesare from form 3 sallabus and it is about stars and galaxies. Students are allowed to view and upload their ideas of stars and galaxies.
This is PPT of class -7 ,Geography, Chapter -5, Water
Reference book is NCERT, .
This is useful for teachers who teach in CBSE and Chhattisgarh board.
so download and use online and offline teaching.
Here is another creative presentation by your slide maker on the topic "OCEAN CURRENTS OF THE WORLD". Hope you like it. If you like it then please, *like*, *Download* and *Share*.
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There are two types of currents in the ocean1) surface curre.docxssusera34210
There are two types of currents in the ocean:
1) surface currents move the water above the pycnocline
a) ≈ 10% of the ocean
b) horizontal motion
c) wind powered = solar powered
2) thermohaline = deep currents move the water below the pycnoline (zone of rapid change of water density)
a) ≈ 90% of the ocean
b) horizontal and vertical motion
c) density driven
density depends temperature and salinity
these are also solar powered
3) these two sets of current are interconnected
Chapter 7 – Ocean Circulation
Surface currents are moved by friction between the surface winds and the water surface = wind driven.
max speed is 3% of wind speed
Since winds are solar powered,
surface currents are solar powered.
The overall pattern of surface currents is controlled by the Coriolis effect, gravity, and the shape of the ocean basin.
Like Fig 7.7, p. 205
Ekman Transport – the net (or average) motion of wind driven water, is 90° to the direction of the wind. In a perfect world, this movement is:
90° to the right in the Northern Hemisphere,
90° to the left in the Southern Hemisphere, WHY?...........the Coriolis Effect
Fig. 9-, p. 236
In the northern hemisphere, the Westerlies tends to move water southeast, while the Trade winds move water northwest!
wind direction
wind-driven water movement (Ekman Transport)
The Westerlies (30° - 60°) and the Trade Winds (0° – 30°) are the strongest winds,* and are the
main winds causing ocean currents!
Largest change in temperature causes the strongest wind!
Remember, according to Ekman Transport, wind - driven water moves 90° to the wind direction.
In the northern hemisphere, the Westerlies tends to move water southeast, while the Trade winds move water northwest!
The movement of wind-driven water can be described with a vector = an arrow pointing in the direction of travel and scaled to the speed.
This vector can be broken up into a component moving toward the edge of the ocean and a component moving toward the center of the ocean.
wind direction water movement
vectors of water movement
The water moving east or west (toward the edge of the basin) bounces
off of the land.
In the northern hemisphere,
the water
current
turns right!
Current bounces off land
Current bounces off land
Subtropical Convergence = a short (≈ 6.5 feet tall) hill of water formed when part of the wind blow water moves to the center of the ocean basin.
Can water stand in a hill?
No!
Gravity works to move the water back downhill.
BUT the wind is still working to push water uphill again
So – The winds build the hill taller, and
The taller the hill the more gravity pulls the water back downhill
The hill continues to grow until wind driven Coriolis deflected motion in = gravity driven motion out.
Then – only the circular movement around the edge of the hill is left.
THIS IS THE SURFACE CURRENT!
Garrison, 2009, Essentials of Oceanography
Under the hill of wa ...
2024.06.01 Introducing a competency framework for languag learning materials ...Sandy Millin
http://sandymillin.wordpress.com/iateflwebinar2024
Published classroom materials form the basis of syllabuses, drive teacher professional development, and have a potentially huge influence on learners, teachers and education systems. All teachers also create their own materials, whether a few sentences on a blackboard, a highly-structured fully-realised online course, or anything in between. Despite this, the knowledge and skills needed to create effective language learning materials are rarely part of teacher training, and are mostly learnt by trial and error.
Knowledge and skills frameworks, generally called competency frameworks, for ELT teachers, trainers and managers have existed for a few years now. However, until I created one for my MA dissertation, there wasn’t one drawing together what we need to know and do to be able to effectively produce language learning materials.
This webinar will introduce you to my framework, highlighting the key competencies I identified from my research. It will also show how anybody involved in language teaching (any language, not just English!), teacher training, managing schools or developing language learning materials can benefit from using the framework.
Macroeconomics- Movie Location
This will be used as part of your Personal Professional Portfolio once graded.
Objective:
Prepare a presentation or a paper using research, basic comparative analysis, data organization and application of economic information. You will make an informed assessment of an economic climate outside of the United States to accomplish an entertainment industry objective.
Biological screening of herbal drugs: Introduction and Need for
Phyto-Pharmacological Screening, New Strategies for evaluating
Natural Products, In vitro evaluation techniques for Antioxidants, Antimicrobial and Anticancer drugs. In vivo evaluation techniques
for Anti-inflammatory, Antiulcer, Anticancer, Wound healing, Antidiabetic, Hepatoprotective, Cardio protective, Diuretics and
Antifertility, Toxicity studies as per OECD guidelines
Introduction to AI for Nonprofits with Tapp NetworkTechSoup
Dive into the world of AI! Experts Jon Hill and Tareq Monaur will guide you through AI's role in enhancing nonprofit websites and basic marketing strategies, making it easy to understand and apply.
How to Make a Field invisible in Odoo 17Celine George
It is possible to hide or invisible some fields in odoo. Commonly using “invisible” attribute in the field definition to invisible the fields. This slide will show how to make a field invisible in odoo 17.
The French Revolution, which began in 1789, was a period of radical social and political upheaval in France. It marked the decline of absolute monarchies, the rise of secular and democratic republics, and the eventual rise of Napoleon Bonaparte. This revolutionary period is crucial in understanding the transition from feudalism to modernity in Europe.
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The French Revolution Class 9 Study Material pdf free download
HYDROSPHERE-2.pptx
1. A hydrosphere is the total amount of water on a planet. The hydrosphere
includes water that is on the surface of the planet, underground, and in
the air.
A hydrosphere is the total amount of water on a planet. The hydrosphere
includes water that is on the surface of the planet, underground, and in
the air. A planet's hydrosphere can be liquid, vapour, or ice.
On Earth, liquid water exists on the surface in the form of oceans, lakes
and rivers. It also exists below ground—as groundwater, in wells
and aquifers. Water vapor is most visible as clouds and fog.
The frozen part of Earth's hydrosphere is made of ice: glaciers, ice caps
and icebergs. The frozen part of the hydrosphere has its own name,
the cryosphere.
Water moves through the hydrosphere in a cycle. Water collects in
clouds, then falls to Earth in the form of rain or snow. This water collects
in rivers, lakes and oceans.
Hydrosphere
2. Then it evaporates into the atmosphere to start the cycle all over
again. This is called the water cycle.
Water is a basic necessity of life. Since 2/3 of the Earth is covered
by water, the Earth is also called the blue planet and the watery
planet.The hydrosphere plays an important role in the existence of
the atmosphere in its present form. Oceans are important in this
regard.
Earth’s oceans contain 97% of the planet’s water, so just 3% is
fresh water, water with low concentrations of salts. Most fresh
water is trapped as ice in the vast glaciers and ice sheets of
Greenland. A storage location for water such as an ocean, glacier,
pond, or even the atmosphere is known as a reservoir. A water
molecule may pass through a reservoir very quickly or may remain
for much longer. The amount of time a molecule stays in a
reservoir is known as its residence time.
3. Tides are the periodic rise and fall of surface water
caused by the gravitational force of the moon and the
sun and by the rotation of the earth. As tides change,
large quantities of water move toward or away from
shore causing tidal currents.
Introduction of Tides
4. Tides are formed by the gravitational pull of the moon and
to some extend by the pull of the sun, which is very far
from the earth.
The moon though small is very close to the earth, it exerts a
strong gravitational pull on the earth.
The earth’s water is very close to the moon and is pulled by
the gravitational force which is applied by the moon.
The moon is directly overhead with the result of that the
water piles up to the water causing an ordinary high tide
there.
There is piling of water on the other side of the earth.
Formation of Tides
5.
6. • Tides move in a great wave around the
Earth by following the movement of the
moon.
• Tides always stripes the coast a interval
of 12 hrs 26 mins.
• Subsequently there is a fall in the water
for
about 6 hrs until it resets a low tide..
Pattern of the Tides
7. DIURNAL TIDE
Some areas, such as the Gulf of Mexico, have only one high and one low tide
each day. This is called a diurnal tide. An area has a diurnal tidal cycle if it
experiences one high and one low tide every lunar day.
SEMIDIURNAL TIDE
In general, most areas have two high tides and two low tides each day. When the
two highs and the two lows are about the same height, the pattern is called a
semi-daily or semidiurnal tide. Many areas on the eastern coast of North America
experience these tidal cycles.
Pattern of the Tides(cont.)
MIXED SEMIDIURNAL TIDE
An area has a mixed semidiurnal tidal cycle if it experiences two high and two
low tides of different size every lunar day. Many areas on the western coast of
North America experience these tidal cycles.
8. SPRING TIDES
When the sun and the moon are in line with each other, they pull the ocean’s
surface in the same direction. This causes higher high tides and lower low tides.
These tides are known as “spring tides”. These are of the greatest tidal range.
This occurs twice a month during full moon and new moon day.
NEAP TIDES
Seven days after a spring tide, the sun and moon are at right angles to each other.
When this happens, the bulge of the ocean caused by the sun partially cancels out
the bulge of the ocean caused by the moon. This produces moderate tides known
as neap tides, meaning that high tides are a little lower and low tides are a little
higher than average. Neap tides occur during the first and third quarter moon,
when the moon appears "half full."
Types of the Tides
9. INTRODUCTION
An ocean current is any more or less permanent or continuous
directed movement of ocean water that flows in one of the
Earth’s ocean.
The currents are generated from the forces acting upon the
water like the earth’s rotation, the wind, the temperature and
salinity differences and the gravitation of the moon.
10. An ocean current flows for great distances and together they
create the global conveyor belt, which plays a dominant role in
determining the climate of many earth’s regions. More
specifically, ocean current influence the temperature of the
regions through which they travel.
11. Circulation pattern
Gyres Surface water circulates in oceans in massive
circular patterns called gyres. The major surface currents
(eastern boundary, western boundary, and equatorial
current) in each ocean link to form a circle.
Gyres are clockwise in the northern hemisphere and
counter clock wise in the southern hemisphere.
12. The Currents of Atlantic ocean:
The Gulf Stream is one of the strongest ocean currents.
It is 50-150km wide, 600m deep and has a velocity of 5km/h.
At 35oN, this current is deflected eastward s under the
combined effect of the Westerlies and the Coriolis force.
It reaches Europe as the North Atlantic Drift, flowing at a speed
of 15km/h, carrying warm Equatorial waters to the coast of
Europe. Part of the waters of this current flow southwards
along the Iberian coast as the cold Canaries Current.
The cold Labrador Current flows between Greenland and the
Baffin Island to join the North Atlantic Drift at 50oN latitude.
In the South Atlantic, the currents flow anticlockwise
to complete the circuit.
13. The Currents of Pacific ocean:
The Kurioshio Current: The Counter Equatorial Current
flows in the opposite direction of the west flowing North
Equatorial Current. Its warm waters flow polewards as the
North Pacific Drift, keeping the Alaskan coast ice-free in
winter.
The Oyashio Currents: The cold Alaskan or Bering Current
flows southwards and is joined by the cold Okhotsk current
and meets the warm Kuroshio or Japan Current as the cold
Oyoshio, off Hokkaido.
Kuroshio Current Oyashio Current
The Currents of Indian ocean:
In the south Indian Ocean, the Equatorial Current turns south
off Malagasy as the Agulhas or Mozambique Current and merges
with the West Wind Drift.
The north Indian Ocean shows a reversal of flow of the currents
in sync with the monsoon winds--- southwest and northwest
monsoons. During summer, when the southwest monsoon
predominates, the North Equatorial Current is replaced by an
easterly movement of water which gives off branches into the
Arabian Sea and the Bay of Bengal, producing clockwise circulation.
In winter the North Equatorial Current flows westwards, south of Sri
Lanka. The northeast monsoons cause a general eastward and
northwards drift along the eastern shores of India and along the
Arabian coast.
During summer During winter
14. Influence climate, by modifying the climatic conditiions of the coastal regions
along which they flow, e.g. the Gulf Drift.
Winds blowing over warm currents pick moisture and bring rain while those
that pass over cold currents do not bring rain but make deserts colder and drier,
e.g. Kalahari Desert.
Currents also influence routes of cyclonic streams.
The dense fogs caused by the meeting of cold and warm currents are dangerous to
ships, e.g. in 1912, the Titanic struck on an iceberg due to poor visibility of the cold
Labrador Current and the warm Gulf Stream Drift.
Ships can sail faster if they follow the direction of the current and the opposite
direction hinders speed.
The mixing of cold and warm ocean currents causes plankton (fish food) to be found in
abundance.