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Description
Ecology Interactions Workbook In The Biosphere (Pack of 6)Help your 5th grade, middle school, or high school child build proficiency in biology with the activity packed Mark Twain Ecology: Interactions in the Biosphere Biology Workbook! Science books are a great way for children to have a thorough understanding of ecology through focused lessons and practice. Students learn about environmental topics including acid rain, the greenhouse effect, and biomes, and will reflect on population studies through
Help your 5th grade, middle school, or high school child build proficiency in biology with the activity-packed Mark Twain Ecology: Interactions in the Biosphere Biology Workbook! Science books are a great way for children to have a thorough understanding of ecology through focused lessons and practice. Students learn about environmental topics including acid rain, the greenhouse effect, and biomes, and will reflect on population studies through engaging lessons, research activities, and ecology projects. The 48-page science book is sized at about 8" x 11"—giving your child plenty of space to complete each exercise. Use the vocabulary study guide and unit test to track your child's progress. Designed by leading educators, Mark Twain Publishing Company specializes in providing captivating, supplemental books and resources in a wide range of subjects for middle- and upper-grade homeschool and classroom curriculum success.Product Type: Activity Books & Kits
Recommended Grade: Grade 5-8+
Recommended Age: 10-18 Years
Alternative Part Numbers: CD405085,405085,9781622238927
GRP:ERGO
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4.0 ★★★★★
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Product Reviews
★★★★★ 5
Balls
Size: Medium
My dog loves chasing these balls. He seems to love the squeak! They fit the chuck it stick perfectly, and are great replacements for the originals that came with the stick.
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Reviewed in the United States on February 7, 2026
★★★★★ 5
Nice set of balls
Size: Medium
The squeaker quickly became my dog’s favorite ball and has replaced the fuzzy tennis balls. My dog is a nonstop fetcher and these chuck it balls are durable and fun.
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Reviewed in the United States on January 9, 2026
★★★★★ 5
Perfect ball
Size: Medium
Our dog loves these!
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Reviewed in the United States on May 26, 2026
★★★★★ 4
Soild
Size: Medium
The orange and blue ball is perfect. Once start taken because the because the blue noisy one was a little to easy for my dog to start ripping pieces off. Will say most toys do not survive his chewing.
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Reviewed in the United States on January 24, 2026
★★★★★ 5
Aggressive chewer who loves fetch approved!!
Size: Medium, Size: Medium
I highly recommend the Chuck-It brand in general, especially for dogs with an aggressive bite. These balls are awesome and are the most durable balls I’ve bought for my 50 lbs lab mix. He has not been able to break one of them yet and we’ve had a few of the squeaky balls for months. They are a bit pricey but worth it.
The one in the pic has been used for months, lives outside and you can see it’s still in great shape.
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Reviewed in the United States on June 22, 2025