Freshwater Ecosystems and Biomes

This video tutorial explores the two major aquatic ecosystems: marine and freshwater. It begins by explaining the difference between ecosystems and biomes, then delves into the marine biome, covering its zones and the diverse life forms it supports. The video also discusses freshwater ecosystems, including lakes, rivers, and wetlands, highlighting their importance and biodiversity. The tutorial concludes with interesting facts about the world's largest lake, river, and wetland.

What is the primary difference between an ecosystem and a biome?

• A biome is created by human activities.

• An ecosystem is larger than a biome.

• A biome is a smaller part of an ecosystem.

• An ecosystem is a group of plants and animals within a biome.

What percentage of Earth's surface is covered by marine ecosystems?

• 50%

• 60%

• 80%

• 70%

Which zone in the ocean receives the most sunlight?

• The Midnight Zone

• The Sunlight Zone

• The Abyssal Zone

• The Twilight Zone

What are coral reefs primarily made of?

• Mud

• Salt

• Calcium carbonate

• Sand

Where do estuaries form?

• On mountain tops

• In the middle of the ocean

• Where rivers and streams flow into the ocean

• In the desert

Which of the following is NOT a type of freshwater ecosystem?

• Lakes

• Rivers

• Oceans

• Ponds

What does 'lentic' refer to in freshwater ecosystems?

• Saltwater

• Still water

• Flowing water

• Brackish water

Which zone in a lake is closest to the shore?

• The littoral zone

• The limnetic zone

• The euphotic zone

• The benthic zone

What is a key characteristic of wetlands?

• They are found only in deserts

• They have no plant life

• They support aquatic plants

• They are always dry

Which of the following is the largest wetland in the world?

• The Okavango Delta

• The Pantanal

• The Everglades

• The Sundarbans