Ninth graders learn how substances move in and out of cells — passive transport (diffusion and osmosis, no energy) and active transport (against the gradient, using energy) — and how tonicity affects a cell.
Students will be able to…
A cell’s membrane is a gatekeeper — letting some things in, pushing others out. How do molecules cross it, and why does the surrounding solution make a cell swell or shrink?
Project this and tap each type of transport. Have students learn how molecules cross the membrane — with and without energy!
Tap any phase to open the teacher moves and student actions.
The cell membrane lets some things in and keeps others out — how?
Students investigate.
Students explain.
Students elaborate.
Students conclude.
Aligned to the Next Generation Science Standards (High School Life Science).
Develop a model illustrating how cell structures provide functions.
Plan an investigation of how feedback maintains homeostasis.
Explain the role of cellular structures.
Developing and using models.
Preview the three formative checks. Tap “Sample answer” to see what mastery looks like — hide them before you print for students.
Have students place potato slices in salt water and pure water, then measure the mass change to see osmosis in action. A printable cell-transport sheet is in the Science library.
Tap a card to flip it, then rate whether you knew it. Built from this lesson’s vocabulary.
A quick self-check with instant feedback, drawn from this lesson’s key terms.
A print-and-go review sheet with a built-in answer key. Tap “Show answer key” to reveal answers, or print the clean version for students.