Surface Area Developing: Define the term surface area.

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Presentation transcript:

Surface Area Developing: Define the term surface area. Secure: Calculate the surface area of 3D objects. Exceeding: Explain how surface area affects the rate of absorption. Entrance Activity Tool Box – Key Words

Key Word Alert! Surface Area The surface area of a solid object is a measure of the total area that the surface of the object takes up. (cm2) Arrange the boxes in order of larges surface area to smallest surface area. A E C B D

Calculating Surface Area Teacher Explanation Calculating Surface Area To calculate the surface area of a 2D object we need to multiply the height by the length. Width 5 cm Height x width = Surface area 30cm x 5cm = _____cm2 30cm x 5cm = 150cm2 Learning activity Height 30cm Calculate the surface area of the following objects: Piece of paper, Mini whiteboard, Large whiteboard, Table, Any other square objects you can find. (10 mins)

Calculating Surface Area Teacher Explanation Calculating Surface Area When calculating the surface area of a cube or cuboid, we need to dismantle the object and calculate each side as a single 2d shape. Top 5cm 8cm Back 2cm 5cm Right side 8cm 2cm Left side 8cm 2cm Bottom 5cm 8cm Front 2cm 5cm

Learning Activity Select three to five cuboids from the list below and calculate the area of each one in your books.

Calculating Surface Area Teacher Explanation Calculating Surface Area Your teacher will provide you with a range of boxes, uses these to practice your calculation skills. Try and find the surface area of 3 different sized boxes. Width 5 cm Height x width = Surface area 30cm x 5cm = _____cm2 30cm x 5cm = 150cm2 Height 30cm

Plenary Creating questions Create your own question regarding surface area. Include a two part question, a mark scheme, and then get someone to answer the question.