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Our changing planet
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.
From lactose to glucose
Students will test the effect of different conditions on lactase, an enzyme that catalyzes the conversion of milk sugar to simple sugar.
Illuminating catalysts
Students will test different types of catalysts and conditions for the light-producing luminol reaction.
Speedy stories from the archive
Students will search the Science News archive to explore the history of catalytic material technology.
Seeking new catalysts
These questions focus on the use of catalysts in common industrial reactions and new research on alternatives to the precious metals currently used as catalysts.

New Rules for Finding Antibiotics
This guide introduces students to the wide world of bacteria, bacterial infections, antibiotics and antibiotic resistance.

Data Back Ban of Artificial Trans Fats
After reading about the results of a ban on trans fats, students can explore the nature of lipids in greater detail, including analyzing foods for the presence of fats.

Built for Speed
This guide explores a wide variety of catalysts and their roles in chemical reactions, and covers recent research seeking alternative catalysts.
A lunar journey
Students will search the Science News archive for other stories related to moon formation.
Probing moon formation
These questions focus on ideas about the origin of Earth's moon and evidence that supports various explanations of its formation.

How Earth Got its Moon
This guide explores scientists' ideas for how the Earth got its moon, and the evidence that supports those ideas. Students can even calculate relevant lunar properties for themselves.
Biomolecules from many angles
These discussion prompts cover molecular structures and properties of sugars, proteins and lipids, as well as questions related to the immune system and cancer.