ocean systems chapter the big idea the oceans are a connected system of water in motion. the oceans...
TRANSCRIPT
Ocean Systems
CHAPTER
the BIG idea
The oceans are a connected system of water in motion.
The oceans are a connected system.3.13.1
Ocean water moves in currents.3.23.2
Waves move through oceans.3.33.3
3.43.4
CHAPTER OUTLINE
Waters rise and fall in tides.
VOCABULARY
KEY CONCEPT CHAPTER HOME
3.1
SECTION OUTLINESECTION OUTLINE
salinity
The oceans are a connected system.
• Much of Earth is covered by ocean water, which contains dissolved salts and gases.
density
continental shelf
sonar
VOCABULARY
KEY CONCEPT CHAPTER HOME
3.1
SECTION OUTLINESECTION OUTLINE
salinity
The oceans are a connected system.
• Much of Earth is covered by ocean water, which contains dissolved salts and gases.
• Ocean temperatures decrease with depth.
• The ocean floor has canyons, mountains, and many other features.
density
continental shelf
sonar
VOCABULARY
KEY CONCEPT CHAPTER HOME
Ocean water moves in currents.3.2
SECTIONOUTLINESECTIONOUTLINE
• Surface currents are set in motion by winds and carry heat around the globe.
• Deep currents are caused by differences in water density. Dense water sinks at the poles and very slowly flows toward the equator.
ocean current
upwelling
downwelling
El Niño
VOCABULARY
KEY CONCEPT CHAPTER HOME
3.3
SECTIONOUTLINESECTIONOUTLINE
Waves move through oceans.
rip current
longshore current
• Ocean waves transport energy, not water. When a wave passes, water particles end up in the same places they began.
• Longshore currents occur when waves hit shores at angles.
• Rip currents are narrow streams of water that breakthrough sandbars.
VOCABULARY
KEY CONCEPT CHAPTER HOME
3.4
SECTIONOUTLINESECTIONOUTLINE
Waters rise and fall in tides.
tidal range
tide
spring tide
The Moon’s gravity pulls Earth’s waters into bulges and dips. As Earth rotates, its movement through these bulges and dips causes tides.
indirect high tide
Earth
Moondirect high tide
neap tide
VOCABULARY
KEY CONCEPT CHAPTER HOME
I. The oceans are a connected system.
A. Ocean water covers much of Earth.
B. Ocean water contains salts and gases.
3.1
KEY CONCEPTSUMMARYKEY CONCEPTSUMMARY
1. Salts
The oceans are a connected system.
C. Ocean temperatures vary.
2. Mapping the Ocean Floor
1. Ocean Exploration
2. Oxygen and Other Gases
salinity
density
continental shelf
sonar
D. The ocean floor has many features.
VOCABULARY
KEY CONCEPT CHAPTER HOME
II. Ocean water moves in currents.
A. The oceans have major currents.
B. Currents interact with climate and weather.
3.2
KEY CONCEPTSUMMARYKEY CONCEPTSUMMARY
1. Surface Currents
2. Deep Currents
Ocean water moves in currents.
ocean current
upwelling
downwelling
El Niño
VOCABULARY
KEY CONCEPT CHAPTER HOME
III. Waves move through oceans.
A. Waves form in the open ocean.
1. Wave Action at the Water’s Surface
2. Wave Action near Shore
3.3
KEY CONCEPTSUMMARYKEY CONCEPTSUMMARY
Waves move through oceans.
B. Waves cause currents near shore.
rip current
longshore current
VOCABULARY
KEY CONCEPT CHAPTER HOME
IV. Waters rise and fall in tides.
A. Coastal waters rise and fall each day.
B. The gravity of the Moon and the Sun causes tides.
1. Daily Tides
2. Monthly Tides
3.4 Waters rise and fall in tides.
C. Tides can be used to generate electricity.
KEY CONCEPTSUMMARYKEY CONCEPTSUMMARY
tidal range
tide
spring tide
neap tide