With 48 fact-filled cards per package, Knowledge Cards are a great source of condensed information—all in a deck the size of a pack of playing cards.
Each card features a confounding question on one side, with the answer on the other side.

A sample question:
Match these words with their definitions:
1. asteroid 2. comet 3. meteoroid 4. meteor 5. meteorite

a. small particle from an asteroid or comet
b. meteoroid that survives passage through Earth’s atmosphere and lands on the planet’s surface
c. inactive, rocky body orbiting the Sun
d. light phenomenon created when a meteoroid is vaporized on entering Earth’s atmosphere
e. sometimes active object whose ice can vaporize in sunlight, forming a dust and gas atmosphere