From a blurry page of notes to a lesson you can try.
The photo on the left became the lesson on the right. Read it, flip the flashcards and try a question. No account needed.
Ch 4 — cell size
bigger cell → vol grows faster than SA
ratio = vol/SA SA : V !!
1cm cube = 6 : 1
2cm cube = 24 : 8 → 3 : 1
why cells r small?? ask
bigger cell → vol grows faster than SA
1cm cube = 6 : 1
2cm cube = 24 : 8 → 3 : 1
why cells r small?? ask
Biology · Chapter 4 · Lesson 2 of 13try it ↓
Cell size and surface area
As a cell grows, its volume rises faster than its surface area. Small cells have more surface for each unit of volume, so food and oxygen reach every part faster.
| Cube side | Surface | Volume | SA : V |
|---|---|---|---|
| 1 cm | 6 cm² | 1 cm³ | 6 : 1 |
| 2 cm | 24 cm² | 8 cm³ | 3 : 1 |
| 3 cm | 54 cm² | 27 cm³ | 2 : 1 |
↑ go on, tap it
textbook p. 112→ Flashcards
Key terms and ideas become cards you swipe through and mark as mastered.
lab sheet: osmosis→ Practice questions
Missed questions come back until you get them, with step-by-step solutions for math.
homework #7→ Skills to learn
Homework only shows which skills you need. The guide teaches them with new examples and never answers the assignment.
Get lessons like this from your own notes.
Start free