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Purple loosestrife is an invasive species of plant that is spreading through North American wetlands. In this problem, the challenge to students is to predict what effect purple loosestrife will have on wetland…
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A group of students wonders how a single cat can have kittens with different coat colors. In this problem, the challenge for students is to explain the difference between cats with pale versus dark coats in terms of DNA…
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Black and White and Spots All Over
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In this problem, students explore how spotted coat color is inherited in cats. The goal is to figure out the gene for spotting in cats by applying what students learned earlier in this chapter from the snapdragon and…
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In this problem, a group of students tries to explain the genetic cause of calico and tortoiseshell coat color in cats. The challenge to students is to describe the genetics of calico cats by explaining the inheritance…
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In this problem, students are asked to determine if all the different-color kittens in a litter could be related to the same father. The challenge to students is to use cat coat color genetics to determine if all of the…
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In this chapter, students wonder how burning a log in a campfire compares to eating a marshmallow. This problem focuses on combustion and metabolism of marshmallows. Marshmallows are a food that is mostly sugar and that…
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In this problem, the challenge to students is to determine in what ways are the matter and energy changes in burning wood similar to and different from those in burning food for energy? What are the matter and energy…
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This problem focuses on how the body changes the materials of things we eat into our own tissue. How do animals and plants use food? Why do we not become what we eat? Students often wonder if the saying “you are what…
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Natural Forces of Decay and Renewal
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Through biodegradation, dead plants and animals get broken down and so do the waste products they produce while living. For plants, these waste products include dead leaves and the remnants of seeds and blossoms. For…
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This section covers understanding biodegradation, including biodegradation protocols providing specific instruction on research. The section also provides techniques in interactive research for developing experiments…
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This section outlines possible assessment criteria for student research, as well as example assessment rubrics for posters and written reports. Engaging in peer review provides both opportunities and challenges for…
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Decay and Renewal presents an inquiry-based approach to studying biodegradation, the assortment of biological processes that cause organic matter to decay. Biodegradation occurs in nature and in human-engineered…
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Biodegradation Protocols: Introduction to Research
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This section presents 14 research protocols. Using one or more of these protocols, students will be able to design and carry out their own experiments. Students will also experience some of the ways in which scientists…
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Interactive Research: Experiments and Field Studies
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This section provides advice to help students choose from a wide range of ideas for research projects. It also provides a series of worksheets designed to guide progress through the various steps of designing and…
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Interactive Research: Wastewater Treatment Design Challenge
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When engineers and scientists design systems for wastewater treatment, they must meet certain criteria concerning treatment effectiveness, and they must work within specified constraints such as cost. This section gives…
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