Oceans
The ocean floor
Food Webs
4th Grade Science
100
This is the steep area where the ocean rapidly gets deeper.
What is the Continental Slope?
100
This is the vast, flat, open space of the deep ocean floor.
What is the abyssal plain?
100

What is the main source of energy in a food web?

The sun

100

What are dichotomous keys used for?

To classify different organisms. 

200

Where is the ocean the saltiest? 

The bottom 

200
This is the underwater border of each continent.
What is continental shelf?
200

What is a niche?

The specific role or job that an organism has in an ecosystem. 

200
How can a contraction site affect ocean pollution?

They create a lot of litter which then can get into the local watershed, eventually going into the ocean

300

These are caused by the moon's gravitational pull

Tides

300
This is the steep area where the ocean rapidly gets deeper.
What is the continental slope?
300

What is a producer? 

An organism that creates its own food through photosynthesis 

300

What are two conditions found at the bottom of the ocean? 

High density, Low temperature, high salinity
400

These are caused by wind, and ocean temperature changes. 

Ocean currents

400
This feature is the deepest part of the ocean. It can be more than 11,000 meters deep.
What is a trench?
400

Where are the least organisms found in the ocean?

Deeper in the ocean

400

What causes the most flooding in areas close to the coastline? 

Hurricanes

500

why do plants not grow in the deep ocean.

The lack of sunlight in the deep ocean

500

This is where the continent ends and the ocean floor begins 

The continental rise

500

If I mix cold water, and hot water into a container of room temperature water, what will happen? 

The hot water will rise, while the cold water (the most dense) will sink to the bottom. 

500

How would an ocean ecosystem be affected if the entire population of sharks disappeared? 

There would be an overpopulation of fish due to the lack of a main predator, which will lead to a decline in population of producers.