Introduction to Freshwater Ecosystems

What is the definition of freshwater ecosystems? Fill in the blank: Freshwater ecosystems are bodies of water with low salt concentration, including _______ , _______ , _______ , _______ , and _______ .

• lakes, rivers, ponds, streams, and wetlands

• oceans, seas, bays, gulfs, and estuaries

• lakes, oceans, seas, rivers, and ponds

• wetlands, coral reefs, seas, rivers, and ponds

Why are freshwater ecosystems important? Fill in the blank: Freshwater ecosystems are essential for _______ , _______ , _______ , and _______ .

• biodiversity, drinking water, agriculture, and climate regulation

• desert formation, salt production, oil drilling, and mountain building

• volcanic eruptions, space exploration, fossil fuel use, and urbanization

• internet access, car manufacturing, movie production, and skyscraper construction

Tags

NGSS.MS-LS2-4

NGSS.MS-LS2-5

Where are freshwater ecosystems found? Fill in the blank: Freshwater ecosystems are found on every continent and support various species of _______ and _______.

• plants and animals

• rocks and minerals

• clouds and rainbows

• cars and buildings

Look at the image provided. Which type of ecosystem is shown in the picture?

• Desert ecosystem

• Freshwater ecosystem

• Marine ecosystem

• Forest ecosystem

Fill in the blank: ________ refers to lakes, ponds, and reservoirs, where water remains still or moves slowly.

• Lentic

• Lotic

• Estuarine

• Marine

Which type of freshwater ecosystem includes rivers, streams, and creeks, where water continuously moves in a particular direction?

• Lentic

• Lotic

• Wetlands

• Estuaries

Wetlands include marshes, swamps, and bogs, which act as natural water filters and flood buffers.

• True

• False

Tags

NGSS.MS-ESS2-1

Fill in the blank: One of the characteristics of freshwater ecosystems is that they have low _______ levels, typically less than 1%.

• salinity

• oxygen

• temperature

• pH

Fill in the blank: Freshwater ecosystems influence local and global climate by regulating _______ cycles.

• water

• carbon

• nitrogen

• oxygen

Tags

NGSS.MS-ESS2-4

Which of the following are examples of fish found in freshwater ecosystems?

• Trout, catfish, salmon, bass, and pike

• Frogs, salamanders, and newts

• Herons, kingfishers, ducks, and bald eagles

• Water lilies, cattails, reeds, and algae