4th Grade Reading Comprehension Worksheets Fourth Grade - Week 17 ... - Free Printable

Let’s go step by step through each question based on the passage “Water Carves the Land.”

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Question 1: How does a river change the land?

From the text:
- Rivers carry dirt and rock (sediment) as they flow.
- They erode (wear away) the land along their banks and bottom.
- Over time, this carving creates valleys and canyons.
- When rivers slow down (like when they reach flat land or enter oceans), they drop the sediment they were carrying — this is called deposition. That builds up new landforms like deltas.

So, rivers change land by eroding it in some places and depositing material in others.

✔ Final Answer for Q1:
Rivers change the land by wearing it away (erosion) as they flow, especially in steep areas, and by dropping sediment (deposition) where they slow down, which can build up new land like deltas.

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Question 2: What would happen if too much sediment is carried into water sources?

The text doesn’t directly say what happens with *too much* sediment, but we can infer from science knowledge + context:

- Too much sediment makes water cloudy (turbid).
- It can clog fish gills → harm aquatic life.
- It fills up lakes/reservoirs → less space for water storage.
- It covers habitats on riverbeds → harms plants and animals that live there.
- It can carry pollutants stuck to the dirt particles.

Also, the text says sediment comes from erosion — so too much means too much erosion upstream, which might mean loss of good soil for farming or unstable slopes.

✔ Final Answer for Q2:
Too much sediment in water can make it dirty and hard for fish to breathe, fill up lakes and rivers, cover important habitats, and reduce water quality for people and wildlife.

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Question 3: What kind of animal would you expect to find in a delta area? Why?

Text clue: Deltas are formed where rivers meet larger bodies of water (like oceans). They’re rich in nutrients because rivers bring sediment full of minerals. Nutrients = food for plants and small creatures → which attract bigger animals.

Deltas are often wetlands — marshy, shallow, full of life.

Animals you’d expect:
- Birds (herons, ducks, eagles) — lots of fish and insects to eat.
- Fish (especially young ones) — safe nursery areas.
- Crabs, shrimp, turtles — adapted to brackish (mix of fresh/salt) water.
- Maybe even alligators or otters in some regions.

Why? Because deltas have plenty of food, shelter, and calm waters perfect for raising babies or feeding.

✔ Final Answer for Q3:
You’d expect to find birds like herons or ducks, fish, crabs, and maybe turtles in a delta. These animals thrive there because deltas are rich in nutrients and offer safe, shallow waters with lots of food.

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Question 4: What is one benefit of a man-made lake that was not there before the reservoir was created?

Text clue: Reservoirs are made by damming rivers. The text says: “Reservoirs provide water for irrigation, drinking, recreation, and hydroelectric power.”

Before the reservoir existed, that spot was probably just a river valley or dry land. Now it holds still water — useful for many things.

Benefits:
- Store water for droughts.
- Provide clean drinking water.
- Allow boating, swimming, fishing (recreation).
- Generate electricity via dams.
- Control flooding downstream.

Pick one clear benefit.

✔ Final Answer for Q4:
One benefit of a man-made lake (reservoir) is that it stores water for drinking or farming during dry times, which wasn’t possible before when the water just flowed away quickly.

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Question 5: The close-up view in the top paragraph helps you define the meaning of the word “delta.” Explain how.

Looking at the structure: The first paragraph describes how rivers carve land and form deltas. Then it says: “A delta is a fan-shaped deposit of silt and sand...”

But wait — actually, looking back at your image description (even though I’m not describing the image!), the instruction implies there’s a close-up diagram or photo labeled “delta” near the top.

In educational texts, a close-up visual next to a term helps readers connect the word to its real-world shape/appearance.

So: The close-up shows what a delta looks like — fan-shaped, where river meets ocean, built up by sediment. Seeing it helps you understand that “delta” isn’t just a name — it’s a specific landform with a recognizable shape and formation process.

✔ Final Answer for Q5:
The close-up view shows the actual shape and features of a delta — like its fan-like spread where the river meets the sea. This helps you visualize and remember that a delta is a landform made by deposited sediment, making the definition clearer than words alone.

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Now compiling all final answers cleanly:

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Final Answer:
1. Rivers change the land by eroding (wearing away) soil and rock as they flow, especially in steep areas, and by depositing sediment where they slow down, forming features like deltas.
2. Too much sediment in water can cloud it, harm fish and other wildlife, fill up lakes and rivers, and reduce water quality for humans and ecosystems.
3. You’d expect to find birds (like herons), fish, crabs, and turtles in a delta because these areas are nutrient-rich and offer safe, shallow habitats with abundant food.
4. One benefit of a man-made lake (reservoir) is storing water for drinking or irrigation during dry periods — something natural rivers couldn’t do since water flows away continuously.
5. The close-up view helps define “delta” by showing its fan-shaped appearance where a river meets a larger body of water, letting you see how sediment builds up — making the concept easier to understand visually.