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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:

Demonstrate an understanding of measuring mass (g, kg) by:
selecting and justifying referents for the units g and kg
modeling and describing the relationship between the units g and kg
estimating mass using referents
measuring and recording mass.

Achievement Indicators
Students who have achieved this outcome(s) should be able to:
- 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 1 g, 100 g and 1 kg.
- 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.

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