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Students will explore how rising carbon dioxide is threatening a lake food web, and will measure how the environment affects the heart rate of water fleas.

These discussion prompts cover the pH scale, the solubility of gases, food webs and how organisms react to climate change.

These questions explore past articles about ocean acidification in the Science News archive.

Students will answer questions based on the Science News article "Rising CO2 threatens lake food webs" and an accompanying graph tracking pH.

This guide reviews the Top 10 scientific discoveries from 2017, as reported by Science News, with a focus on key concepts covered across scientific disciplines.

These discussion prompts help students gain a better understanding of key vocabulary and concepts covered in the Top 10 articles of 2017.

Students will compare and contrast one of the Top 10 stories of 2017 with an earlier related article from the Science News archive.

Students will read and summarize one of the Top 10 stories of 2017, as reported by Science News.

This guide connects the radioactive carbon-14 dating of newly exposed mosses in the Arctic to the bigger story of climate change.

These discussion prompts cover the basics of radioactive decay and carbon-14 dating, as well as concepts related to climate change.

Students will search the Science News archive for stories related to frozen mosses, radioactive carbon-14 dating and global warming.

Students will answer questions about how scientists measure the age of newly thawed mosses in the Arctic, and the implications of those scientists' findings.