The full collection is a 3-book series of apps for kids, teens, and adults.

Addictive learning game pits man versus machine. Who's smarter? Search bots find answers. Guess the question. Did the robots show smart clues? Beat the 5 minute timer.

This lite version is free. The full collection is a 3-book series of apps for kids, teens, and adults.

- Tap a button to select a learning activity

- Tap the left selector for index of terms

- Swipe to turn the page

- Tap the right selector for more apps

- Tap the gallery to discover 800+ apps and 50k+ terms

Join the 5,500,000 plus who have downloaded Keys-by-TEARN.

KEYWORDS: molecules, organics, solutions, acid, base, elements, periodic table, electrons, neutrons, protons, chemicals, reactions, gas, liquid, solids, engergy, forces