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Only When the Light Falls On It is a free printable Grade 1 science worksheet on evidence that objects can be seen only when lit, aligned to Common Core standard 1-PS4-2. It prints 8 questions with an answer key on its own sheet of paper, in 25 versions that each ask different questions, so no two pupils in the class work from the same page. Print it from the browser or download it as a PDF — no account, no email.

Set 3 of 25 · the same problems every time you open this link.

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One paper per pupil

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

Only When the Light Falls On It

1-PS4-2

NameDate

Circle the best answer.

1.Why can you see the moon at night?
  • A.It is close to us
  • B.Sunlight falls on it
  • C.It makes its own light
2.You open the curtains in a dark room. Why can you see the furniture?
  • A.The curtains make light
  • B.Daylight now falls on it
  • C.The furniture wakes up
3.What do you need before you can see anything at all?
  • A.Light falling on it
  • B.Quiet
  • C.Warmth
4.Which of these can be seen in a completely dark room?
  • A.Anything large
  • B.Anything white
  • C.Nothing at all
5.A cat's eyes seem to shine in a car's headlights. What is happening?
  • A.Light from the headlights is bouncing off them
  • B.The eyes make their own light
  • C.The eyes are hot
6.Two children look into the same dark box. What do they both see?
  • A.The box's colour
  • B.Different things
  • C.Nothing, because there is no light in it
7.You shine a torch into the box. Why can you see the toy now?
  • A.The toy starts glowing on its own
  • B.The torch makes the toy bigger
  • C.Light falls on it and reaches your eye
8.A toy is in a closed box with no light. Why can you not see it?
  • A.No light is falling on it
  • B.It has changed colour
  • C.It has moved away

LessonPrint · 1-PS4-2 · Set 3 · free to copy for classroom use

Answer key — Only When the Light Falls On It

Set 3. Prints on its own sheet.

  1. 1.Sunlight falls on it
  2. 2.Daylight now falls on it
  3. 3.Light falling on it
  4. 4.Nothing at all
  5. 5.Light from the headlights is bouncing off them
  6. 6.Nothing, because there is no light in it
  7. 7.Light falls on it and reaches your eye
  8. 8.No light is falling on it

More practice for 1-PS4-2

Show that you can only see an object when light falls on it.

Teaching this next? Only When the Light Falls On It is the 50-minute plan for it, with the misconceptions to expect.

All Grade 1 worksheets

Last reviewed 2026-09-05. Aligned to 1-PS4-2 of the Next Generation Science Standards.