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5th Grade

Deeper reading, structured writing, fractions, and multi-step problem solving

Worksheet for 2026-09-09

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📖 Why Saltwater Is Denser

Seawater contains dissolved salts that add mass without increasing volume by the same proportion. This makes seawater denser than most freshwater. Objects can experience a slightly greater buoyant force in saltwater. That is one reason floating can feel easier in very salty water.

1. What key idea begins the explanation?

 

2. What mechanism or supporting detail is described?

 

3. What additional evidence or effect is given?

 

4. How does the final detail deepen the explanation?

 

✏️ Writing

Write 1–2 developed paragraphs explaining why saltwater is denser. Use evidence and cause-and-effect reasoning.

➕ Math

1. 25 × 40 = ______
2. 446 × 3 = ______
3. Estimate 25 × 40 by rounding both numbers: ______
4. A warehouse has 25 shelves with 40 boxes on each shelf. How many boxes are there? ______

🎨 Color & Create

Create a labeled model or diagram that explains why saltwater is denser.

View Answer Key

📖 Reading Answers

  1. Seawater contains dissolved salts that add mass without increasing volume by the same proportion.
  2. This makes seawater denser than most freshwater.
  3. Objects can experience a slightly greater buoyant force in saltwater.
  4. That is one reason floating can feel easier in very salty water.

➕ Math Answers

  1. 1000
  2. 1338
  3. 1200
  4. 1000

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