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Questions and Answers
Questions and Answers
Estuaries are important natural resources for what lives in the ocean.
Estuaries are important natural resources for what lives in the ocean.
True (A)
Oceans cover more than 50% of the Earth's surface.
Oceans cover more than 50% of the Earth's surface.
False (B)
The sun supplies water near the surface of the ocean, supporting photosynthesis.
The sun supplies water near the surface of the ocean, supporting photosynthesis.
False (B)
Most living creatures live at a depth of approximately 200 meters in the ocean.
Most living creatures live at a depth of approximately 200 meters in the ocean.
Estuaries are ecosystems where water flows from rivers into oceans or seas.
Estuaries are ecosystems where water flows from rivers into oceans or seas.
The water in estuaries is less salty than ocean water, but more salty than river water.
The water in estuaries is less salty than ocean water, but more salty than river water.
The ocean is divided into zones, each affecting the organisms that live in it in the same way.
The ocean is divided into zones, each affecting the organisms that live in it in the same way.
Living creatures near the bottom of the ocean are called swimmers.
Living creatures near the bottom of the ocean are called swimmers.
Freshwater ecosystems include oceans and seas.
Freshwater ecosystems include oceans and seas.
Ponds and lakes are home to green algae and water lilies.
Ponds and lakes are home to green algae and water lilies.
Trout have streamlined bodies that help them swim with water currents.
Trout have streamlined bodies that help them swim with water currents.
Wetlands are areas where the water level is close to the soil surface most of the time.
Wetlands are areas where the water level is close to the soil surface most of the time.
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Study Notes
Study Notes
Oceans
- Cover more than 50% of the Earth's surface
- Receive water from the sun near the surface, supporting photosynthesis
Estuaries
- Ecosystems where water flows from rivers into oceans or seas
- Water is less salty than ocean water, but more salty than river water
Ocean Zones
- Divided into zones, each affecting the organisms that live in it
Freshwater Ecosystems
- Exclude oceans and seas
- Include ponds and lakes, which are home to green algae and water lilies
Aquatic Organisms
- Most living creatures live at a depth of approximately 200 meters in the ocean
- Trout have streamlined bodies that help them swim with water currents
Wetlands
- Areas where the water level is close to the soil surface most of the time
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