CER 0 1 2 3 Does not make a Makes an Makes an accurate and complete A statement that claim or makes an accurate but claim. answers the inaccurate claim. vague or original incomplete claim. E.g.: beads separate because of “The question/problem. E.g.: beads did differences in density as well as ionic “The not separate” or E.g.: beads interactions.” “The “The beads separated separate because because they have of density” the same density” Evidence: No evidence or only General Provides appropriate but insufficient Provides appropriate and Scientific data that inappropriate statement that data sufficient data. support the claim. evidence includes little specific data E.g.: beads separate and then E.g.: observed that the “The “We come together.” beads went to opposite sides but E.g.: green then slowly regrouped over “The separates into time.” blue” Reasoning: No reasoning or only Repeats evidence Provides 2 of the following 3 Provides 2 of the following 3 A justification that inappropriate and links it to the concepts: concepts: connects the reasoning. claim, but does Density affects whether a Density affects whether a evidence to the not include a substance floats or substance floats or claim using E.g.: negative complete Solubility is affected by Solubility is affected by “the appropriate and electrons attract the description of the intermolecular attractions. intermolecular attractions. sufficient scientific positive electrons of science concepts. The intermolecular attraction The intermolecular attraction concepts. another substance between polar water molecules between polar water which causes them to E.g.: beads and the dissolved ions of a salt is molecules and the dissolved “The dissolve” separated greater than the dipole-dipole ions of a salt is greater than because the blue attraction between water the dipole-dipole attraction beads were molecules and alcohol molecules. between water and alcohol initially more E.g.: beads separated initially molecules. “The dense and the because the white beads had a E.g.: addition to having “In white beads were greater density than the blue beads different densities, the beads less dense.” then they came together because the separate because the partially
CER 0 1 2 3 A statement that answers the original question/problem. Does not make a claim or makes an inaccurate claim. E.g.: “The beads did not separate” or “The beads separated because they have the same density” Makes an accurate but vague or incomplete claim. E.g.: “The beads separate because of density” Makes an accurate and complete claim. E.g.: “The beads separate because of differences in density as well as ionic interactions.” Evidence: Scientific data that support the claim. No evidence or only inappropriate evidence General statement that includes little specific data E.g.: “The green separates into blue” Provides appropriate but insufficient data E.g.: “The beads separate and then come together.” Provides appropriate and sufficient data. E.g.: “We observed that the beads went to opposite sides but then slowly regrouped over time.” Reasoning: A justification that connects the evidence to the claim using appropriate and sufficient scientific concepts. No reasoning or only inappropriate reasoning. E.g.: “the negative electrons attract the positive electrons of another substance which causes them to dissolve” Repeats evidence and links it to the claim, but does not include a complete description of the science concepts. E.g.: “The beads separated because the blue beads were initially more dense and the white beads were less dense.” Provides 2 of the following 3 concepts: Density affects whether a substance floats or Solubility is affected by intermolecular attractions. The intermolecular attraction between polar water molecules and the dissolved ions of a salt is greater than the dipole-dipole attraction between water molecules and alcohol molecules. E.g.: “The beads separated initially because the white beads had a greater density than the blue beads then they came together because the Provides 2 of the following 3 concepts: Density affects whether a substance floats or Solubility is affected by intermolecular attractions. The intermolecular attraction between polar water molecules and the dissolved ions of a salt is greater than the dipole-dipole attraction between water and alcohol molecules. E.g.: “In addition to having different densities, the beads separate because the partially