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Multiple Solutions to Natural Hazards — Reading Comprehension

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NGSS 4-ESS3-2
ESS3.B

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This Grade 4 science reading passage introduces students to the concept that there are often multiple solutions to natural hazard problems, and each solution has strengths and weaknesses. Aligned to NGSS 4-ESS3-2 and ESS3.B Disciplinary Core Ideas, the passage explains how engineers might protect a town from flooding using different methods: building a levee, digging a deeper river channel, or moving buildings away from the floodplain. Students learn to compare solutions by asking critical questions about protection effectiveness, cost, durability, and practicality. The passage uses simple, age-appropriate language to build foundational understanding of engineering design and trade-offs. Audio-integrated features support diverse learners. Activities include comprehension questions, writing prompts, and graphic organizers that help students evaluate and compare different hazard solutions. This resource prepares students to generate and compare multiple solutions to reduce the impacts of natural hazards on humans.

CONTENT PREVIEW

Illustration showing a dam, levee, storm drain, and tree preventing floods. — Engineers use dams, levees, and nature to protect communities from flooding.

A natural hazard is an event in nature that can harm people or damage property, such as floods, earthquakes, or hurricanes. When a natural hazard threatens a community, engineers work to find ways to protect people. Often, there is more than one solution, or way to solve the problem. Each solution has strengths and weaknesses.

For example, imagine a town near a river that floods during heavy rain. Engineers might suggest three different solutions. First, they could build a levee, which is a wall along the river that keeps water from flowing into the town. A levee is less expensive and can be built quickly. However, if the water gets too high, the levee can break and cause sudden flooding.

Second, engineers could dig a deeper river channel, which is the path where the river flows. A deeper channel holds more water, so less water spills onto land. This solution works well but costs more money and takes longer to complete.

Third, engineers could move buildings away from the floodplain, the low area near the river that floods easily. Moving buildings protects people very well because they are far from danger. However, this solution is the most expensive and takes the longest time.

To compare solutions, engineers ask important questions: How well does it protect people? How much does it cost? How long does it last? Is it practical? By thinking about these trade-offs, or the good and bad parts of each choice, communities can pick the best solution for their needs.

Interesting Fact: The Netherlands has built over 17,000 miles of levees and dams to protect the country from flooding because much of the land is below sea level!

What is a natural hazard?

A fun event in natureAn event that can harm peopleA type of buildingA kind of weather report

What is a levee?

A deep river channelA wall along the riverA low area of landA type of flood

Which solution costs the most money?

Building a leveeDigging a deeper channelMoving buildings awayAll cost the same

Why might a deeper channel help?

It holds more waterIt costs less moneyIt builds fasterIt moves buildings

What question helps compare solutions?

What color is it?How much does it cost?Who invented it?Where is it located?

Why is moving buildings most effective?

It is fastest to completeIt costs the leastPeople are far from dangerIt uses less materials