Older than dirt
Don Brown
Older than dirt
Age Rating, Reading Level & Content Guide
a kinda-sorta biography of Earth
by Don Brown
The text is written at a 4th grade reading level, the subject matter is intended for middle graders (ages 9–12), and the content is gentle with no concerning themes.
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About This Book
Journey back nearly 14 billion years to witness the explosive beginning of everything! Watch as swirling clouds of gas and rock come together, transforming into a fiery planet full of surprises. Discover Earth's ancient story through a thrilling blend of science and imagination.
Themes
Quick Assessment
This is a Level 4-5 book with gentle content intensity. No notable content concerns flagged. Written for readers ages 9-12.
Why we rated Older than dirt 9C
Older than dirt is written at a Level 4-5 reading level across 104 pages (approximately 6,115 words). Strong independent readers around grade 5.8 can typically handle this book on their own; with parent or teacher support, Older than dirt works for readers up to grade 6.8.
Read aloud, Older than dirt takes about 41 minutes, which fits within a single read-aloud session.
We rate Older than dirt as 9C ("Clear") because the content sits in the "Gentle" range — no conflict beyond everyday childhood experiences. Across our four dimensions (emotional, physical, social, thematic) the book reads as evenly gentle; no single dimension stands out as a concern.
No specific content flags were raised by community reviewers, which is consistent with the gentle intensity score.
Thematically, Older than dirt explores science & nature, historical, and origin — these threads give the book room to mean different things to different readers.
Good fit for
- ✓ Children in the Ages 9-12 range — the maturity and attention span match the story's pacing.
- ✓ Readers who like a steady plot with enough momentum to keep pages turning.
- ✓ Kids drawn to stories about science & nature, historical, origin.
- ✓ Curious kids who prefer real-world topics over made-up stories.
Maybe not for
- ! Readers whose emotional readiness lags behind their decoding skills — this book's intensity outruns its reading level, a classic "gifted kid" mismatch.
For Parents
Content Intensity
9C — ClearNo conflict beyond everyday childhood experiences. Safe for sensitive readers.
Was our "Gentle" content intensity rating accurate for this book?
Reading Insights
Hook Factor
5/10Engaging read with solid pacing and interesting themes.
Discussion Potential
1/10A lighter read — great for independent enjoyment.
Book DNA
Multi-dimensional content fingerprint
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Details
Book Length
- ISBN
- 9780544805033
- Pages
- 104
- Publisher
- Houghton Mifflin Harcourt
- Published
- 2017
- Type
- Nonfiction
- Word Count
- 6,115
- Read-Aloud
- ~41 min
- Text Density
- Light Text