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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.

These discussion prompts encourage students to explore concepts related to gravity and how scientists measure it.

Students will answer questions based on the Science News article "Galileo experiment re-created in space."

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.

Students will simulate the exponential radioactive decay and half-life of carbon-14 with pennies and a food coloring/bleach chemical reaction.

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.

To better understand the life cycle of stars, students will estimate the conditions involved in stars and element formation.