Your interactive study companion
Discover the seven essential life processes (MRS GREN) that distinguish living organisms from non-living objects, and explore the basic building blocks of all life: cells.
Explore the hierarchy of matter and life, from the tiniest atoms and cells to complex tissues, organs, and complete living organisms.
Explore how matter transforms between solids, liquids, and gases through energy changes, and understand that mass remains constant throughout these physical processes.
Explore what the universe is made of, from atoms and states of matter to density and chemical changes.
Discover why objects float or sink and learn about the invisible force that pushes up against gravity in water and air.
Learn how to describe motion, calculate speed using formulas, and interpret distance-time graphs.
Explore how matter changes form through physical mixtures and chemical reactions, and learn to distinguish between reversible and irreversible changes.
Explore how six basic devices change the way we apply force to make work easier.