🔭Intro to Science

The tools and habits scientists use to turn a curious question into a real, tested answer.

What Makes Something Science · Observation vs. Inference · Forming a Hypothesis · Variables and Fair Tests · +2 more

What everything around you is actually made of, and what happens when it melts, dissolves, mixes, or seems to vanish.

Solids, Liquids, and Gases · Melting and Freezing · Boiling and Evaporation · Condensation and Sublimation · +7 more

Where the energy around you actually goes: heat moving between objects, light bouncing and bending, and sound shaking through the air.

Forms of Energy · Heat vs. Temperature · Conduction · Convection · +9 more

Circuits that light up the moment a loop closes, magnets that pull without touching, and the currents tying the two together.

Static Electricity · Circuits: Completing the Loop · Electrical Conductors and Insulators · Magnets and Magnetic Fields · +2 more

Every push, pull, and wobble explained: what makes things speed up, slow down, and stay put, from a coasting bike to a rocket launch.

Pushes and Pulls · Speed · Balanced and Unbalanced Forces · Friction · +5 more

The six basic tools hiding inside a wheelbarrow, a doorknob, and a jar lid, and how each one trades force for distance.

Levers · Pulleys · Wheel and Axle · Inclined Planes · +3 more

What separates a living thing from a rock, what's inside every one of your cells, and how a plant builds its own food from sunlight.

Characteristics of Living Things · Cells: The Building Blocks of Life · Plant Cells vs. Animal Cells · Photosynthesis · +7 more

How energy and matter move through a habitat, one bite at a time, and what happens when one link in the chain disappears.

Food Chains · Food Webs · Producers, Consumers, and Decomposers · Energy Pyramids · +4 more

The systems working inside you right now without you thinking about it, and how your body fights off the germs trying to get in.

Skeletal and Muscular Systems · Circulatory System · Respiratory System · Digestive System · +2 more

The record of life buried in rock, and the slow process, one generation at a time, that produced everything alive today.

How Fossils Form · What Fossils Tell Us · Extinction · Evolution: Change Over Generations

What's beneath your feet, how mountains get built and worn back down, and the slow-motion collisions that shake and reshape the ground.

Earth's Layers · Rocks and the Rock Cycle · Minerals · Soil · +5 more

The water and air constantly cycling around the planet, and the difference between the weather outside today and the climate of a whole region.

The Water Cycle · Oceans · Weather vs. Climate · Clouds · +4 more

The moon's changing face, the planets circling the sun, and everything farther out — stars, galaxies, and the missions sent to explore them.

The Moon and Its Phases · Eclipses · Tides · The Solar System: An Overview · +6 more

The resources Earth provides, what happens to them after we're done, and the choices that decide whether they'll still be there tomorrow.

Natural Resources · Pollution · Recycling and Reducing Waste · Conservation · +1 more