This eBook is a collection of presentations created by the 7th grade science students at Chelsea Elementary School. The students chose a topic regarding how Earth’s ecosystems are changing and researched information about that topic. The topics included climate change, human impact on a specific ecosystem, invasive species, and Maine through the years. Once the students researched their selected topic, they created a presentation to share their knowledge and help educate others. In Book One, the topics addressed include climate change and human impact on various ecosystems.
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