Surface Area to Volume Ratio

What would be the surface area to volume ratio for an organisms with a SV of 12.57 mm² and volume of 4.12 mm³?

• 4 : 1

• 6 : 2

• 1.5 : 0.5

• 3 : 1

What is the surface area to volume ratio of a cell with the dimensions of 2x2x2 sq units?

• 8 cm squared : 24 cm cubed

• 12 cm squared : 8 cm cubed

• 12 cm cubed : 8 cm squared

• 24cm squared : 8 cm cubed

Tags

NGSS.MS-LS1-2

Which of the following ratios is the same as 24 : 8?

• 1 : 3

• 3 : 1

• 8 : 3

• 8 : 24

Which of the following ratios is the same as 50 : 5

• 5 : 1

• 5 : 10

• 10 : 5

• 10 : 1

Define Surface area

• The total area on the surface of an object
• Length X Width 
• 6 X (length X width)
• Add up the sides and divide by 4

How can surface area (SA) be increased? 

• Grow larger
• Divide into smaller pieces

For cells to stay alive they require what type of SA:V?

• Large SA, Large V
• Small SA, Large V
• Large SA, Small V
• Small SA, Small V

High Surface area to volume ratio allows cells to do what quickly?

• Move materials around inside the cell
• Move materials in and out of the cell 
• Communicate to other cells
• Divide

This image shows how materials move into various sized cells in a given amount of time.... why does one square cell have more pink coloring than the others? 

• The surface area was too larger to get through
• The volume of the other cells was too large for the dye to get through
• There was not enough surface area for the dye to get through
• The volume was too low for the dye to stay in the square

Hint: think SA: V

• Elephant because it has more volume to heat up 
• Elephant because it has larger ears to block the sun
• Mouse because it has more surface area than volume
• mouse because it doesn't have as much heat

Tags

NGSS.MS-PS3-5