Transcript Ocean - Wsfcs

Ocean and Climate
http://climatekids.nasa.gov/ocean/
http://www.youtube.com/watch?v=qeZgJzt3m04
Eric Angat
Teacher
Essential Question
How do the
oceans influence
the climate?
Uneven distribution of light because Earth is tilted.
Cold ( tundra)
Taiga
temperate
Desert 30°
Warm 0° (tropics)
Desert 30°
temperate
Taiga
Cold ( tundra
Midwest
West
http://www.windows2universe.org/earth/climate/cli_latitude.html
1. How do ocean currents work?
COLD WATER
SINKS
(convection)
WARM
WATER RISES
(convection)
WARM
WATER IS
LESS DENSE
THAN COLD
WATER. That
is why it rises.
Ocean currents work because of density differences and
temperature. This leads to the CONVECTION CURRENT IN
THE OCEAN or Global Conveyor Belt.
2. What are the three types of heat
transfer and how do they travel?
Warm
air rises
Convection
(fluids)
Through fluids
(liquids and
gases).
Conduction
(solids)
Through metals
Radiation
Through nothing like sunlight
through space.
3. Which type of heat transfer
moves warm water away
from the equator?
A conduction Liquids and gases
B convection transfers heat through
convection while
C radiation
solids transfer heat by
conduction.
D inversion
4. How did Marlin get to Sydney, Australia?
Marlin and Dory
rode the East
Australian current,
a part of the Global
Ocean Current.
https://www.youtube.com/watch?v=JpV7NIJTxD0
One of Australia’s most
remarkable natural gifts, the Great
Barrier Reef is blessed with the
breathtaking beauty of the world’s
largest coral reef. The reef contains
an abundance of marine life and
comprises of over 3000 individual
reef systems and coral cays and
literally hundreds of picturesque
tropical islands with some of the
worlds most beautiful sun-soaked,
golden beaches.Because of its
natural beauty, the Great Barrier
Reef has become one of the worlds
most sought after tourist
destinations. A visitor to the Great
Barrier Reef can enjoy many
experiences including snorkelling,
scuba diving, aircraft or helicopter
tours, bare boats (self-sail), glassbottomed boat viewing, semisubmersibles and educational
trips, cruise ship tours, whale
watching and swimming with
dolphins.
http://www.greatbarrierreef.org/
5. What causes global warming?
http://climatekids.nasa.gov/ocean/
http://www.youtube.com/watch?v=qeZgJzt3m04
6. How many percent of Earth is
covered with water?
7. How many percent of Earth’s water
is in the ocean?
8.How many percent of Earth’s water
is freshwater? Think!
Freshwater includes polar ice,
groundwater, lake, river, pond, water
vapor.
Our world is a water world. The ocean
covers 70% of Earth's surface. The
average depth of the ocean is 2 or 3
miles. In some places, the ocean is
deeper than the tallest mountains are
high! The oceans contains
about 97% of all the
water on Earth.
9. Why are planktons important in the
food chain?
In the ocean, all
creatures depend on
the supply of
plankton (tiny plants
and animals) at the
bottom of the food
chain.
10. What is coral
bleaching?
11. What is the connection
between global
warming and coral
bleaching?
The coral work with
algae . The algae
make food for itself
and the coral. The
coral provide the
algae a safe and
sunny place to live.
When water is too warm,
corals will expel the algae
(zooxanthellae) living in
their tissues causing the
coral to turn completely
white. This is called coral
bleaching.
12. How do the ocean absorb carbon
dioxide?
The ocean absorbs
carbon dioxide from
the atmosphere
wherever air meets
water.
Wind causes waves and
giving more opportunity
for the water to absorb
the carbon dioxide.
13. Classify the following as either acid
or base.
a.Vinegar is ____________
b.Tomato juice is ___________
c.Pure water is _____________
d.Ocean water is _____________
e.Ammonia is _______________
14. What is causing the ocean to become
acidic?
pH Scale
Neutral=7
Normally, ocean water is less acidic than fresh water.
Unfortunately, as the ocean absorbs more and more carbon dioxide
from the atmosphere, it becomes more acidic.
Classify the following as either acid
or alkaline/base.
acid
a.Vinegar is ____________
acid
b.Tomato juice is ___________
neutral
c.Pure water is _____________
Alkaline or base
d.Ocean water is _____________
e.Ammonia is _______________
Slightly alkaline or base
14. What is causing the ocean to become
acidic? It is absorbing too much carbon
dioxide that becomes carbonic acid.
15. Describe the water coming from
the equator? Warm
16. Describe the water coming from
the pole?
Cold
17. Warmer water and less salty water
lighter ___(heavier, lighter) than
are ________
Colder water and very salty water .
Ocean Currents
The Great Ocean
Conveyor Belt carries
warmer, less salty water
from the equator to the
poles, and colder,
saltier water from the
poles back toward the
equator. Colder water
and very salty water are
heavier than warmer
water and less salty
water.
Global Ocean Conveyor Belt
http://www.youtube.com/watch?v=qeZgJzt3m04
18. How is the balance of heat
energy maintained in the oceans?
A. The sun’s energy is equally distributed
throughout the oceans.
B. The tides transfer heat energy across the
oceans.
C. The movement of waves transfers heat
energy throughout the oceans.
D. Heat energy is cycled by currents
between the equator and the polar
regions.
19. What happens to ocean
water as temperature increases?
In convection current, warm become lighter
and rises. Lighter means lower density.
A The salinity decreases.
B The density decreases.
C The oxygen content increases.
D The surface tension expands.
20. What happens to ocean
salinity as temperature
Higher temperature means faster evaporation of
increases?
water. Salt does not evaporate, so more salt and
less water which means higher density.
A The salinity decreases.
B The density increases.
C The oxygen content increases.
D The surface tension expands.
21. The ocean is becoming more
acidic and aquatic organisms are
dying because___.
A.the atmosphere has too much
carbon dioxide causing global
climate change.
B.the ocean absorbing too much
carbon dioxide from the
atmosphere than it can use.
Greenhouse gases cause
greenhouse effect that
makes our planet warmer.
Carbon dioxide and
methane causes
greenhouse effect,
warmer temperature.
Carbon dioxide
and methane
from point and
non-point
source
pollution.
Polar ice caps
melts releasing
freshwater into
the ocean.
The ocean become less
salty and less dense
causing the Ocean
Global Conveyor belt to
be disrupted.
Since the oceans influence our
climate, this disruption cause GLOBAL
CLIMATE CHANGE.
22. Global warming is causing global
climate change because ____.
A. polar ice caps are melting making
the ocean less salty and less dense.
B. Global temperature is rising
rapidly.
C. the Global conveyor belt is
disrupted.
D. All of the above.
23. What are the two main gases
that causes greenhouse effect?
Methane is 10x more potent than CO2, but there is
a lot more CO2 in the atmosphere than methane.
A.carbon dioxide and methane
B.Nitrogen and oxygen
C.Silicon and iron
D.Magnesium and carbon
Which type of heat transfer
moves warm water from the Gulf
of Mexico and cold water away
from the Atlantic?
A. conduction
B. radiation
C. convection
D. inversion