1.2 - Surface Area To Volume Ratio

Question 1

Surface Area To Volume Ratio (SA:V)

Answer 1

Is the measure of the amount of surface area per units of volume

Question 2

Surface Area

Answer 2

Is a measure of the outside surface of an object (v²)

Question 3

Volume

Answer 3

Is the measure of the amount of space inside an object (v³)

Question 4

Shapes With A High SA:V

Answer 4

• Thin, flat shapes
• Long extensions
• Many small projections

Question 5

Calculating SA:V Example

Answer 5

Cube, all sides are 2cm

SA = (2 x 2) x 6 = 24cm²
V = 2 x 2 x 2 = 8cm³
SA:V = 24/8 = 3
∴ SA:V = 3:1

Question 6

Cells With A High SA:V Can…

Answer 6

Obtain nutrients and remove wastes more efficiently

Question 7

The Shape Of A Cell Can…

Answer 7

Change a cell’s SA:V

Question 8

When A Cell Increases…

Answer 8

The SA:V decreases