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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 21 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 makes its own light
  • B.Sunlight falls on it
  • C.It is close to us
2.A cat's eyes seem to shine in a car's headlights. What is happening?
  • A.The eyes are hot
  • B.Light from the headlights is bouncing off them
  • C.The eyes make their own light
3.What do you need before you can see anything at all?
  • A.Warmth
  • B.Light falling on it
  • C.Quiet
4.Which of these can be seen in a completely dark room?
  • A.Anything white
  • B.Nothing at all
  • C.Anything large
5.You open the curtains in a dark room. Why can you see the furniture?
  • A.The furniture wakes up
  • B.The curtains make light
  • C.Daylight now falls on it
6.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
7.You shine a torch into the box. Why can you see the toy now?
  • A.The toy starts glowing on its own
  • B.Light falls on it and reaches your eye
  • C.The torch makes the toy bigger
8.Two children look into the same dark box. What do they both see?
  • A.Nothing, because there is no light in it
  • B.Different things
  • C.The box's colour

LessonPrint · 1-PS4-2 · Set 21 · free to copy for classroom use

Answer key — Only When the Light Falls On It

Set 21. Prints on its own sheet.

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