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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 explores an increasingly ubiquitous technology: the smartphone. How do its sensors work, what data do they collect and how can we keep ourselves safe from its spying eyes?

In this two-part activity, students will complete a few simple light polarization exercises to model LCD technology and then demonstrate how a smartphone app analyzes and utilizes data to perform a specific function.

These discussion prompts ask students to describe how various smartphone sensors work, and analyze three graphs related to data gathered by such sensors.

Students will search the Science News archive for stories related to the powers and perils of smartphone use.

Students will answer questions about how smartphone apps could be used to spy on people and how such spying might be prevented.

This guide explores the equivalence prinicple, a foundation of Einstein's general theory of relativity, and the effects of low-gravity space environments on materials and the human body.

Students will determine if an object's composition and the height at which can object is dropped affects its gravitational acceleration.

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

Use this short section to explore and compare other articles about measurements of the equivalence principle as reported by Science News since 1924.