Chapter 9 Measurement.

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Presentation transcript:

Chapter 9 Measurement

Chapter Summary This chapter emphasises the practical nature of measurement. We learn to measure by measuring. The chapter introduces the big ideas of conservation and comparison The chapter discusses the importance of being able to construct and read scales

Starting point Write a list of as many measurements as you can that you have a good mental image of. For example you may have a clear image of how much ‘one pint’ is; or one metre.

Units of measurement Attribute SI Unit Abbreviation Imperial Units Conversion Length Metre m Inches, feet, yards, miles in ft yd 1in = 2.54cm 1ft = 0.3m Mass Kilogram kg Ounces, pounds, stones oz lb st 1oz = 28.35g 1lb = 0.45kg Time Second s Area Square Metre m2 Square inches, acres sq in Volume Cubic Metre m3 cubic inches, cubic feet cu in cu ft Capacity Litre l Pints, gallons pt gal 1pt = 0.56l

Conservation of area Make as many different rectilinear shapes as you can with an area of 36 square units. Write down the perimeters of these shapes. What do you notice?

Misconceptions Decide which of these statements are always true; which are sometimes true and which are never true. If you double the dimensions of a rectangle you double its perimeter. If you double the dimensions of a rectangle you double its area. If you double the lengths of the sides of a rectangle, but leave the width the same, you double the area. If you double the dimensions of a cuboid you double its volume.

Observing teaching measurement Watch the video on the companion website which shows the lesson about ‘magical potions’. How might you adapt this lesson for use with pupils that you are currently teaching?