Science

Animal Life Cycles and Adaptations

Free Grade 3-5 explainer on animal life cycles and adaptations. Learn how animals grow, change, and adapt to survive.

Earth, Sun, and Moon

Free Grade 3-5 explainer on Earth, Sun, and Moon. Learn about Earth's rotation, revolution, moon phases, eclipses, and the seasons.

Energy: Forms and Transfer

Free Grade 3-5 explainer on energy forms and transfer. Learn kinetic, potential, thermal, light, sound, and electrical energy and how it moves.

Food Chains and Ecosystems

Free Grade 3-5 explainer on food chains and ecosystems. Learn how energy flows through producers, consumers, and decomposers.

Forces and Motion

Free Grade 3-5 explainer on forces and motion. Learn about push, pull, gravity, friction, and how forces cause objects to move or stop.

Human Body Systems

Free Grade 3-5 explainer on human body systems. Learn the major systems, their organs, and how they work together to keep the body functioning.

Living and Nonliving Things

Free Grade 3-5 explainer on living and nonliving things. Learn the characteristics that define life and how to classify objects.

Plant Life Cycles and Structures

Free Grade 3-5 explainer on plant life cycles and structures. Learn how plants grow, reproduce, and the role of each plant part.

Properties of Light and Sound

Free Grade 3-5 explainer on light and sound. Learn how light travels, reflects, and refracts, and how sound waves are produced and transmitted.

Rocks, Minerals, and Soil

Free Grade 3-5 explainer on rocks, minerals, and soil. Learn the three types of rock, how they form, and the role of soil in ecosystems.

Simple Machines

Free Grade 3-5 explainer on simple machines. Learn levers, pulleys, wheels, inclined planes, wedges, and screws and how they reduce effort.

States of Matter

Free Grade 3-5 explainer on states of matter. Learn about solids, liquids, and gases, their properties, and how matter changes state.

The Scientific Method

Free Grade 3-5 explainer on the scientific method. Learn how scientists ask questions, form hypotheses, run experiments, and draw conclusions.

The Solar System

Free Grade 3-5 explainer on the solar system. Learn about the planets, sun, moons, asteroids, and other objects that make up our solar system.

The Water Cycle

Free Grade 3-5 explainer on the water cycle. Learn how water moves through evaporation, condensation, precipitation, and collection.

Using Scientific Tools and Measurement

Free Grade 3-5 explainer on scientific tools and measurement. Learn to use rulers, thermometers, balances, graduated cylinders, and more.

Weather and Climate

Free Grade 3-5 explainer on weather and climate. Learn the difference between weather and climate, types of weather, and what causes them.