Grade 3 - Shape and Space
Standard 3.SS.4 - Practice finding the appropriate weight of various objects. Understand the approximate scale of different metric units.
Included Skills: Measurement
Demonstrate an understanding of measuring mass (g, kg) by: • selecting and justifying referents for the units g and kg • modelling and describing the relationship between the units g and kg • estimating mass, using referents • measuring and recording mass. • Achievement Indicators: - 3SS4.1 Provide a personal referent for one kilogram, and explain the choice. - 3SS4.2 Estimate the mass of a given object, using personal referents. - 3SS4.3 Provide a personal referent for one gram, and explain the choice. - 3SS4.4 Match a given standard unit to a given referent. - 3SS4.5 Explain the relationship between 1000 g and 1 kg, using a model. - 3SS4.6 Measure, using a scale, and record, using the units g and kg, the mass of given everyday objects. - 3SS4.7 Provide examples of 3-D objects that have a mass of approximately 1 g, 100 g and 1 kg. - 3SS4.8 Determine the mass of two given similar objects with different masses, and explain the results. - 3SS4.9 Determine the mass of an object, change its shape, remeasure its mass, and explain the results.