Magic School Bus Episode Chronology

Season 1

 * 1) Gets Lost in Space  - Solar System
 * 2) For Lunch - Digestion
 * 3) Inside Ralphie - Germs
 * 4) Gets Eaten - Food Chains
 * 5) Hops Home - Habitats
 * 6) Meets the Rot Squad - Decomposition
 * 7) All Dried Up - Desert Adaptation
 * 8) In the Haunted House - Sound
 * 9) Gets Ready, Set, Dough - Kitchen Chemistry
 * 10) Plays Ball - Forces
 * 11) Goes to Seed - Seeds
 * 12) Gets Ants in its Pants - Ants
 * 13) Kicks Up a Storm - Weather

Season 2

 * 1) Blows its Top - Volcanoes
 * 2) Flexes its Muscles - Body Mechanics
 * 3) The Busasaurus - Dinosaurs
 * 4) Going Batty - Bats
 * 5) Butterfly and the Bog Beast - Butterflies
 * 6) Wet All Over - Water
 * 7) In a Pickle - Microbes
 * 8) Revving Up - Engines
 * 9) Taking Flight - Flight
 * 10) Getting Energized - Energy
 * 11) Out of This World - Space Rocks
 * 12) Cold Feet - Cold/Warm-Blooded Animals
 * 13) Ups and Downs - Floating and Sinking

Season 3

 * 1) In a Beehive - Honeybees
 * 2) In the Arctic - Heat
 * 3) Spins a Web - Spiders
 * 4) Under Construction - Structures
 * 5) Gets a Bright Idea - Light
 * 6) Shows and Tells - Archaeology
 * 7) Makes a Rainbow - Color
 * 8) Goes Upstream - Migration
 * 9) Works Out - Circulation
 * 10) Gets Planted - Photosynthesis
 * 11) In the Rainforest - Rainforest Ecology
 * 12) Rocks and Rolls - Water Erosion
 * 13) Holiday Special - Recycling

Season 4

 * 1) Meets Molly Cule - Molecules
 * 2) Cracks a Yolk - Eggs
 * 3) Goes to Mussel Beach - Tidal Zones
 * 4) Goes on Air - Air Pressure
 * 5) Gets Swamped - Wetlands
 * 6) Goes Cellular - Cells
 * 7) Sees Stars - Stars
 * 8) Gains Weight - Gravity
 * 9) Makes a Stink - Smells
 * 10) Gets Charged - Electricity
 * 11) Gets Programmed - Computers
 * 12) In the City - City Critters
 * 13) Takes a Dive - Coral Reefs and Symbiosis