“Surface Area & Absorption? L7: Getting Started “Surface Area & Absorption?

Calculating Surface Area How would you calculate the surface area of the flat top of your desk?

How would you calculate the surface area of a cube? Cube = (area of 1 side) x 6 =(4 x 4) x 6 = 96cm3

How would you calculate the surface area of a rectangular solid? Rectangle = (area of short side x 2) + (area of long side x 4) = (25 x 2) + (50 x 4) = 50 + 200 =250cm3

Practice: 6cm = (6 x 6) x 6 = 216cm3 6cm 6cm

Practice: = (5 x 5) x 6 = 150cm3 5cm

= (5 x 5 x 2) + (5 x 10 x 4) = (50) + (200) = 250cm3 Practice: 5cm 5cm

= (5 x 4 x 2) + (8 x 5 x 4) = (40) + (160) = 200cm3 Practice: 5cm 4cm

“Surface Area & Absorption” L7: 7.1 “Surface Area & Absorption”

QUESTION: How can you increase the surface area of a clay cube?

HYPOTHESIS: I believe…because…

PROCEDURE: (p. 51-52) 1. Use a ruler to form the clay into a cube that measures 2 cm on each side. 2. Calculate the surface area of the cube and record it under your data section.

Increase the surface area of the cube: You must still be able to calculate the surface area. You may not add more clay. You must not greatly increase the total volume occupied by the cube. (i.e. if the clay came in a small box, it must still fit into that box)

DATA: Calculate the new total surface area. Draw how you set up your new piece of clay and record it in your data section.

DATA: Surface area of beginning cube=_____ Surface area of new shape=_____

VOCABULARY: 7.1 Surface Area

VOCABULARY: 7.1 Surface Area – the part of an object that makes contact with its environment

CONCLUSION: Be sure to write complete sentences. Be sure to look back at the original question. Be sure to include vocabulary words.