THEOCEANS
OCEAN
Oceans cover nearly 71% of the Earth’s surface!
There are 5 Main Oceans
The Pacific Ocean is the largest ocean – by far!
Oceans
are made up
of salt water
The amount of
salt in water
is called
SALINITY
Salinity of oceans
varies depending on
climate.
Why?
Warm dry regions = high salinity
Heavy evaporation occurs,
leaving more salt behind.
Cold regions = low salinity
Less evaporation occurs and
melting
ice and snow add fresh water
Water Pressure
The weight of
water pressing
on an object.
The deeper you
go in the ocean,
the greater the
pressure!
If you can correctly name all the continents and
oceans and
place their location on the map, you get to read the
next slide…..
The ocean cartoon of the week!
The Ocean Floor
Continental Shelf
Continental Slope
• Shallow, flat area at edge of
the continent.
• Extends out average of 50
miles
• Can be 460 feet deep
• A steep hill that drops
sharply in depth
• Found just beyond the
Continental Shelf
• 10,000 – 13,000 feet
deep
Continental Rise
• Between slope and abyssal plain
• Build up of sediments
Abyssal Plain
• Broad, flattest part of ocean
• Like a plain
• 16000 feet deep
Ridge – Underwater mountain range
Mid-Atlantic Ridge
37,280 miles long rift/valley that runs through Atlantic, Pacific, and Indian Oceans
Trench (rift) – Deepest part of ocean
Mariana Trench Philippines – 36,198 feet deep! Mount Everest would fit inside of it!