Ocean Basics + Features
Water Interactions, Salinity and Pressure
Ocean Organisms, Niches and Food Webs
Currents, Wind, Waves and Tides
Ocean Impacts
100
How many oceans are there?
One global ocean!
100
Salinity is the measure of the amount of dissolved _________ in ocean water.
Salt
100
What organism produces over 50% of Earth's oxygen and is the base of most marine food webs?
Phytoplankton
100
What is the natural movement of air called?
Wind
100
Climate change is resulting in sea surface temperatures ________________.
Rising or Increasing
200
Oceans cover about what percent of the surface of the Earth?
A- 25%
B- 50%
C- 70%
D- 100%
C- 70% of the surface of Earth!
200
Areas where freshwater enters the ocean (like a river) __________ the salinity of the ocean in those areas.
Decrease
200
What tool do scientists use to classify organisms by asking a set of questions about the organism?
A Dichotomous Key
200
_________ are caused by the friction of wind moving against the water.
Waves
200
What is happening to the sea ice in the ocean due to climate change?
It's Melting
300
What does the ocean floor look like?
Varied, with hills, valleys, canyons, underwater mountain ranges, volcanoes and even waterfalls!
300
When hot water and cold water meet in the ocean water, what happens to the cold water?
It sinks
300
An organism's ________ is its role within a community. It may change over time.
Niche
300
During the tides, water is highest during ____________ and lowest during ____________.
High Tide
Low Tide
300
What is one risk to coastal communities due to weather or climate change?
Rising sea levels
Erosion
Property damage
400
A ______________ is an area over which surface water and all the materials it collects flows to a single collection area, like a bay or an ocean.
Watershed
400
The deeper you descend in the ocean, what decreases? (Select all that apply!)
Temperature, Water Pressure, Sunlight
Temperature and Sunlight Decrease
400
A _________ shows the flow of energy from the sun through the producers, consumers and decomposers.
Food Web
400
A __________ is the continuous movement of ocean water in a specific direction, like a river of moving water in the ocean.
Current
400
Name 2 positive impacts humans can have on oceans and coastal communities
More sustainable fishing practices and fish farming
New practices and laws to prevent trash and other pollution from getting to coasts and open ocean
Educational outreach
New construction to control flooding and wave impacts
New practices to control coastal erosion
Global commitments from many countries to fight climate change
Protecting portions of beaches as protected areas
Banning single-use plastics
Ocean habitat restoration projects
500
What are the deepest parts of the ocean floor called?
Trenches
500
Why are there layers in the graduated cylinder?
Each layer has a different salinity level
500
Draw the arrows correctly in the food chain below:
Sun Kelp Sea Urchin Sea Otter
Sun --> Kelp --> Sea Urchin --> Sea Otter
500
What happens to ocean waters due to the gravitational pull of the moon?
The Tides
500
Ocean acidity is increasing due to an increase in ____________ from the atmosphere.
Carbon Dioxide