What Happens When Mangroves Are Cut Down?

What Happens When Mangroves Are Cut Down?: Grade 4 Science Worksheet

What happens to a shore when its mangroves are gone? Students compare before and after pictures of a Florida mangrove shore. Before, mangrove roots hold the sand and give birds and fish a home. After, people cut the mangroves down for houses, the animals are gone, and the sand washes away. Then students see how planting baby mangroves helps fix the shore.

Key Science Vocabulary

• mangrove: a tree that grows in salty water along Florida’s coast
• environment: the land, water, and living things around us
• habitat: the place where an animal finds food and shelter
• erosion: land being washed or worn away
• impact: a change that helps or harms

What Students Do

• Read a short teach box on mangroves and on changes that help or harm
• Part A: big before and after pictures; four circle questions
• Part B: students plant baby mangroves; two circle questions
• Answer key with a red reason line on why the sand washes away

Standards

Florida SC.4.L.17.4: Recognize ways plants and animals, including humans, can impact the environment. Builds toward NGSS 5-ESS3-1 (how communities protect Earth’s resources and environment).

Where It Fits in Grades 3 to 8

Earlier grades learn that living things need their habitats. Grade 4 shows how plants and people change the environment. In grade 5 and middle school, students study human impact, conservation, and solutions like restoring wetlands.

Teaching Tip

Show a photo of a real Florida mangrove restoration project. Students like knowing that kids their age plant mangroves, and it makes Part B feel real. Prints clearly in black and white and takes 8 to 10 minutes.