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 - Provide a personal referent for one gram and explain the choice. - Provide a personal referent for one kilogram and explain the choice. - Match a given standard unit to a given referent. - Explain the relationship between 1000 grams and 1 kilogram using a model. - Estimate the mass of a given object using personal referents. - Determine and record the mass of a given 3-D object. - Measure, using a scale, and record the mass of given everyday objects using the units g and kg. - Provide examples of 3-D objects that have a mass of approximately 1g, 100g and 1kg. - Determine the mass of two given similar objects with different masses and explain the results. - Determine the mass of an object, change its shape, re-measure its mass and explain the results.