Math Games

Grade 3 - Shape and Space

Standard 3.SS.2 - Practice finding the appropriate weight of various objects. Understand the approximate scale of different metric units.

Included Skills:

Demonstrate understanding of measuring mass in g and kg by:
• selecting and justifying referents for g and kg
• modelling and describing the relationship between g and kg
• estimating mass using referents
• measuring and recording mass.
• Observe and describe situations relevant to self, family, and community that involve measuring mass.
• Create and solve situational questions that involve the estimating or measuring of mass using g or kg.
• Analyze 3-D objects to determine personal referents for 1 kg, 100 g, 10 g, and 1 g.
• Analyze the relationships between 1 g, 10 g, 100 g, 1000 g, and 1 kg and explain the strategies used (e.g., 1 kg is heavier than 100 g, 10 g, and 1 g, or 1 kg is the same mass as 1000 g.)
• Select, with justification, an appropriate unit for measuring the mass of a given 3-D objects (e.g., kg would be used to measure a motorbike).
• Determine, using a scale, and record the mass of an object relevant to one's self, family, or community.
• Estimate the mass of an object relevant to one's self, family, or community and explain the strategy used.
• Directly compare the mass of two 3-D objects and then verify the comparison by measuring the actual masses using a scale.
• Generalize statements about the mass of a specific amount of matter when reformed into different shapes or sizes (e.g, use clay to make an object, measure the mass of the object, reform the clay into another object and measure the mass of the two objects; an empty balloon versus a full balloon; or water versus ice).
• Observe and document conversations, mass media reports, and other forms of text that use the term "weight" rather than "mass".