First Grade · Science · week 10

We see with light

Discover that eyes need light to see, by comparing a sealed dark box to one with a little light let in.

You might think your eyes just "work" all the time, but eyes actually need light to see anything at all. Without any light, even the sharpest eyes see nothing but darkness.

Today you test this idea directly: you will look at an object inside a completely dark box, then let a little light in and look again.

📋 For the teacher
Teach it (10–15 min):
  • Make sure the box is truly light-tight, taping any gaps, so the first test is a fair, total-darkness comparison.
  • Let your child be surprised by the total blackness before you explain why -- the surprise is the point.
  • Try opening the lid different amounts, a crack versus wide open, to show that more light means seeing more clearly.
  • Connect this to real life: a closet with the door shut, or a cave, as other examples of true darkness.
Talk about it:
  • What did you see inside the fully sealed box?
  • What changed the moment light got in?
  • Can you think of a real place that is as dark as your box?

Mastery looks like: They state that eyes need light to see, and support it with what they observed in the dark-box test.

Common stumbles: Assuming their eyes just were not "adjusted" yet, rather than realizing there was truly no light present; peeking around the seal instead of through the intended hole.

Homework for this lessonType it, write it with a stylus, or print it for pencil & paper.open →
Records attendance + 15 min of Science for this learner.
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