Preview the major scientific themes of the year and recognize how physics, chemistry, biology, and earth sciences are interconnected.
Exploring material properties and changes.
Science isn't isolated into separate boxes. Fields like physics, chemistry, biology, and earth sciences are deeply interconnected. Discoveries in one area frequently inspire new questions in another.
Visual comparison of reversible and irreversible changes.
Reversible vs. Irreversible Changes
Matching exercise for types of changes.
Terms
Definitions
Connecting heat flow to the water cycle and life processes.
Heat flows and causes changes everywhere, from the melting of a single ice cube in a glass to the melting of a massive glacier. Driven by heat from the Sun, the Earth's water cycle operates continuously: water evaporates from the seas, falls back down as rain, and trickles deep underground.
Fill-in-the-blanks for the water cycle and life processes.
Mid-page checkpoint on interconnectedness.
How light helps us measure time and understand the universe.
Long before electric clocks and digital watches existed, early humans observed the shadows of objects cast by the Sun to measure time. Today, light and shadows do more than help us mark hours or create shadow puppets; they give us a deep understanding of the universe we live in.