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Grade 4 · unit review

Review: Draw Light and Shade, Match Marks, and Crop Pictures

Use a stated drawing model and an observable comparison. Plan light-facing and shaded values, compare marks over equal patches, construct mirrored arrangements and preserve the details that support an image’s claim.

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Bring the unit skills together

Use these 4 new cases to check your reasoning. Choices are temporary and are not saved to an account, sent to staff or recorded as school grades. Download your current review choices before leaving or reloading.

Unit review questions
1. For an original sphere drawing, the simplified light model puts the brightest region toward the upper-right source and deepest shade opposite it. Which value plan matches?
Need a hint?
  • A simple shading model places the brighter region toward the named light source and the darker region opposite it.
  • Real lighting also involves reflected and ambient light.
2. A drawing model treats more same-width hatch lines per equal patch as darker value. Patch A has 7 lines; B has 10. Which follows that model?
Need a hint?
  • Hatching uses repeated lines to suggest value.
  • Hold the comparison conditions fixed.
3. A deliberately symmetric border has 7 identical marks left of its center and 11 right. With identical positions available, how many marks must be added on the left to match counts?
Need a hint?
  • Deliberate mirror symmetry requires corresponding elements across a center line.
  • Two sides with equal numbers may still have different arrangements.
4. An original picture’s claim is supported by the visible relation between child and book. Which crop preserves evidence for that relation?
Need a hint?
  • A crop changes what remains visible.
  • A tighter image can remove distractions but also remove necessary evidence.

The download contains your current choices and any checked feedback. Keep the separate transfer-task work in your own document; downloading its instructions does not mark it complete.

Use the skills in a new task

Complete these four parts. Answer each question, then make a separate drawing or written plan. Check each piece of work with the points given. 1. For an original sphere drawing, the simplified light model puts the brightest region toward the lower-right source and deepest shade opposite it. Which value plan matches? Supplied candidates: (A) Bright toward lower-right; dark toward upper-left (B) Dark toward lower-right; bright toward upper-left (C) Every region equally dark (D) Only outline the sphere and remove all value regions. For your separate work, draw a sphere diagram with a source arrow from the left and label its brighter and darker regions. Criteria: The bright region faces the arrow’s source and the darker region lies opposite under the stated model. 2. A drawing model treats more same-width hatch lines per equal patch as darker value. Patch A has 9 lines; B has 14. Which follows that model? Supplied candidates: (A) A is darker because it has fewer lines (B) B is darker because it has 5 more lines per equal patch (C) Both must have identical value (D) The number of lines determines the object’s real material. For your separate work, make two equal patches using the same line width, one with four hatch lines and one with eight. Criteria: The denser patch has four more lines; the explanation keeps area and line width equal. 3. A deliberately symmetric border has 9 identical marks left of its center and 12 right. With identical positions available, how many marks must be added on the left to match counts? Supplied candidates: (A) 2 marks (B) 3 marks (C) 4 marks (D) 5 marks. For your separate work, draw three marks left of a line and five right, then complete matching pairs on both sides. Criteria: Two new left marks correct the count difference and all five pairs occupy corresponding mirrored positions. 4. An original picture’s claim is supported by the visible relation between bird and nest. Which crop preserves evidence for that relation? Supplied candidates: (A) Crop to an empty corner (B) Keep both bird and nest and the connecting space (C) Keep only bird (D) Keep only nest. For your separate work, draw a hand beside a gift, then mark a crop that retains both and the visible hand-to-gift relation. Criteria: Both evidence-bearing objects and the relation remain inside the crop; an explanation identifies what would be lost in a one-object crop.

Work on paper or in your own document. Explain the choices you made.

  • Answer all four questions and explain what in each description helped you choose.
  • Make each of the four drawings or written plans.
  • Use the checklist for each piece of work, then show one change that improves it.
  • Describe your shading, hatching, mirrored pairs and crop choices.
Compare with a model response

1. Bright toward lower-right; dark toward upper-left. The stated model assigns light-facing value to the lower-right and opposing shade toward upper-left. This contrast can suggest form on flat paper. It is a simplified drawing model, not a complete physical account of reflected or ambient light. Check the separate work: The bright region faces the arrow’s source and the darker region lies opposite under the stated model. 2. B is darker because it has 5 more lines per equal patch. Compare equal areas and equal line widths. B has 14−9=5 additional lines, so it has less unmarked space in the supplied model. This explains represented value, not actual material texture. Check the separate work: The denser patch has four more lines; the explanation keeps area and line width equal. 3. 3 marks. The count difference is 12−9=3. Add that many matching marks in mirrored positions. Equal counts alone do not guarantee every arrangement is symmetrical; the brief also requires corresponding positions. Check the separate work: Two new left marks correct the count difference and all five pairs occupy corresponding mirrored positions. 4. Keep both bird and nest and the connecting space. The relationship needs both relevant objects plus the visible space or action linking them. A tighter crop may remove irrelevant material, but deleting one of the two evidence-bearing objects prevents the same supported comparison. Check the separate work: Both evidence-bearing objects and the relation remain inside the crop; an explanation identifies what would be lost in a one-object crop.

A different response can also meet the criteria. Compare the evidence and reasoning, rather than copying the wording.