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Lesson 1Free
The Magma Convection Conveyor
A subterranean research probe maps magma inside Earth’s mantle. Hotter, less dense rock rises while colder, denser rock sinks.
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← Back to Grade 6
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Grade 6 Subject
Science & STEM
Earth systems, climate dynamics, tectonics, weather, oceans, space science, ecosystems, matter, energy, and engineering labs.
Current Plan
free
20
Lessons
5
Free
15
Premium
22
Activities
Learning Units
Choose a Lesson
Earth’s Dynamic Crust and Tectonics
5 lessons🏔️
Lesson 2Free
Convergent Boundary Mountain Building
Civil engineers building a highway through the Himalayas find twisted, folded rock layers caused by the Indian Plate slamming into the Eurasian Plate.
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Lesson 3Premium
Transform Fault Friction Release
Seismologists along the San Andreas Fault note that tectonic plates are stuck, storing massive elastic energy until they suddenly slip.
MS-ESS2-2MS-ESS3-2
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Lesson 4Premium
The Sea-Floor Spreading Ribbon
A deep-sea submarine maps the Mid-Atlantic Ridge, discovering that the ocean floor is splitting apart and creating brand-new volcanic rock.
MS-ESS2-2MS-ESS2-3
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Lesson 5Premium
The Rock Cycle Metamorphic Oven
A mining operation digs deep underground and discovers that sedimentary limestone has transformed into hard marble due to intense heat and crushing tectonic pressure.
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Atmospheric Mechanics and Weather Systems
5 lessons🌬️
Lesson 6Free
High vs. Low Air Pressure Cells
A meteorologist tracks a weather front. High-pressure cells contain cold, dense air sinking toward the ground, while low-pressure cells feature warm, rising air that creates storms.
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Lesson 7Premium
Sea Breeze Thermal Gradients
Beachgoers notice that during hot summer afternoons, a strong, cool breeze suddenly blows from the cold ocean toward the scorching hot sand.
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Lesson 8Premium
Cold Front Storm Squalls
A fast-moving, dense cold air mass collides with a warm, humid air mass over the Midwest, triggering severe thunderstorms and high winds.
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Lesson 9Premium
Global Wind Coriolis Deviations
Long-distance commercial pilots must adjust their flight paths because Earth’s rapid spinning rotation curves winds across the globe.
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Lesson 10Premium
The Rain Shadow Desert Barrier
Lush forests cover the western side of the Cascade mountains, but the eastern side is a dry, barren desert.
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The Hydrosphere and Oceanic Conveyors
5 lessons🧂
Lesson 11Free
Great Ocean Conveyor Salinity Engines
Marine scientists monitor cold, salty water sinking at the North Pole, acting as a pump that drives global deep-ocean currents.
MS-ESS2-4MS-ESS2-6
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Lesson 12Premium
Groundwater Aquifer Saturation
Civil engineers test a city water well, measuring how rainwater filters downward through permeable sandstone layers until it hits non-permeable granite bedrock.
MS-ESS2-4MS-ESS3-1
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Lesson 13Premium
Glacial Melt Freshwater Pulses
Climatologists notice that melting glaciers dump massive pulses of pure fresh water into the Atlantic Ocean, disrupting ocean circulation currents.
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Lesson 14Premium
Evapotranspiration Forest Pumps
Satellites track a rainforest, observing that millions of trees suck water from deep soil and release it through leaves, forming massive rain clouds.
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Lesson 15Premium
Flash Flood Watershed Erosion
A desert canyon experiences a sudden cloudburst storm. The rocky soil cannot absorb the water, creating a flash flood that rips up boulder layers.
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Space Systems and Earth-Sun-Moon Dynamics
5 lessons🛰️
Lesson 16Free
The Gravity Orbit Anchor
Space engineers launch a new satellite, balancing its forward speed with Earth’s gravitational pull so it falls in a perfect orbit without flying away.
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Lesson 17Premium
Lunar Phase Alignment
An amateur astronomer observes the Moon over 29.5 days, watching it change from a thin crescent into a bright full moon.
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Lesson 18Premium
Solar Eclipse Shadow Alignment
Millions of people gather along a line of totality to watch the day sky turn dark as the Moon covers the Sun completely.
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Lesson 19Premium
The Orbital Tilt Season Engine
In December, Australia experiences hot summer days while Canada is buried in winter blizzards.
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Lesson 20Premium
Torsional Tidal Bulges
Coast Guard captains track ocean lines, noting that the tide rises and falls twice every day as the Moon’s gravitational field pulls on Earth.
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