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Moon Shapes for Four Weeks is a free printable Grade 1 science worksheet on describing and predicting the moon's changing shape from a class diary, aligned to NGSS performance expectation 1-ESS1-1. It prints 7 questions with an answer key on its own sheet of paper, in 25 versions that each ask different questions, so no two students in the class work from the same page. Print it from the browser or download it as a PDF — no account, no email.

Set 22 of 25 · the same problems every time you open this link.

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Set 1 has all 25 in a single PDF. All 25 sets ask different questions.

Moon Shapes for Four Weeks

1-ESS1-1

NameDate

Read the record, then answer the questions.

1.Read the record, then answer the questions.

Moon Shapes for Four Weeks

Drawings the class made of the moon, one each week for four weeks. THE MOON WE DREW Week 1: a thin curve, like a fingernail Week 2: half a circle Week 3: a full round circle Week 4: half a circle again, the other side We drew it at the same time each week.

  1. 1. What claim does this record support?
  2. 2. What happened to the moon's shape over the four weeks?
  3. 3. What shape would you expect in week 5?
  4. 4. What does this record not tell you?
2.After the full moon, what happens to the shape night by night?
  • A.It stays full
  • B.It gets bigger
  • C.It gets smaller again
3.Does the moon's shape change in a pattern?
  • A.No, it is always round
  • B.No, it changes at random
  • C.Yes, the same shapes come back about every four weeks
4.On some clear nights the moon cannot be seen at all. When in the pattern does that happen?
  • A.Just before the thin curve appears again
  • B.At the full moon
  • C.At the half moon
5.The moon is a thin curve and getting bigger each night. What shape comes next?
  • A.A thin curve again
  • B.A square
  • C.Half a circle
6.You know today's moon shape. What can you do with the pattern?
  • A.Make the moon full sooner
  • B.Predict the shape you will see next week
  • C.Predict tomorrow's weather
7.What do we call the moon when it is a full round circle?
  • A.A new moon
  • B.A full moon
  • C.A half moon

LessonPrint · 1-ESS1-1 · Set 22 · free to copy for classroom use

Answer key — Moon Shapes for Four Weeks

Set 22. Prints on its own sheet.

  1. 1.1. The moon's shape changes in a pattern that can be predicted. 2. It grew from a thin curve to a full circle and then began to shrink. 3. A thin curve again, because the shape is shrinking after the full circle. 4. It does not tell you what the moon looked like between the weeks.
  2. 2.It gets smaller again
  3. 3.Yes, the same shapes come back about every four weeks
  4. 4.Just before the thin curve appears again
  5. 5.Half a circle
  6. 6.Predict the shape you will see next week
  7. 7.A full moon

Last reviewed 2026-09-05. Aligned to 1-ESS1-1 of the Next Generation Science Standards.