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These questions focus on student understanding of gram-negative bacteria and the bacteria's response to antibiotics.

These discussion prompts ask students to think about ways that different elements create varied results in battery design, and related redox reactions.

Students will search the Science News archive for stories related to battery research.

Based on the Science News article "Charging the future," these questions focus on battery design, how lithium-ion batteries compare with newer types and the nature of experimental design.

These discussion prompts cover the types of rocks and minerals found on Earth, and isotopes, their measurement and their applications.

Students will work in groups to explore available data and research various aspects of climate change and then present their findings to the class.

These discussion prompts cover radiant energy coming to and from Earth, the effects of global warming on the land, ocean, atmosphere and on species, and possible methods of averting or adapting to climate change.

Students can search the Science News archive for the earliest stories on climate change and for techniques to combat it.

These questions focus on observations about Earth's surface temperature over time and reasons behind the changing climate.

Students will test the effect of different conditions on lactase, an enzyme that catalyzes the conversion of milk sugar to simple sugar.

Students will test different types of catalysts and conditions for the light-producing luminol reaction.

Students will search the Science News archive to explore the history of catalytic material technology.