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How we see

4th grade (Year 5 in England) · 10 questions · Common Core: NGSS.4-PS4-2, NGSS.4-LS1-2 · England: KS2 Y6 Light

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1
Question 1
What is the job of the iris?
- A. the layer at the back that senses light
- B. focuses light onto the back of the eye
- C. carries signals from the eye to the brain
- D. the coloured ring that makes the pupil bigger or smaller
2
Question 2
You walk from a dark room into bright sunshine. What happens to your pupils?
- A. They close completely.
- B. They stay the same.
- C. They get bigger.
- D. They get smaller to let in less light.
3
Question 3
What is the job of the lens?
- A. the hole that lets light into the eye
- B. the coloured ring that makes the pupil bigger or smaller
- C. protects the eye and spreads tears
- D. focuses light onto the back of the eye
4
Question 4
Why can't you see a book in a completely dark room even though your eyes are open?
- A. Your eyes are switched off.
- B. No light is reflecting off the book into your eyes.
- C. Books absorb eyesight.
- D. The book is invisible at night.
5
Question 5
What is the job of the optic nerve?
- A. the layer at the back that senses light
- B. the coloured ring that makes the pupil bigger or smaller
- C. focuses light onto the back of the eye
- D. carries signals from the eye to the brain
6
Question 6
You walk from a dark room into bright sunshine. What happens to your pupils?
- A. They stay the same.
- B. They get smaller to let in less light.
- C. They close completely.
- D. They get bigger.
7
Question 7
What is the job of the pupil?
- A. carries signals from the eye to the brain
- B. the layer at the back that senses light
- C. the hole that lets light into the eye
- D. protects the eye and spreads tears
8
Question 8
Why do cats' pupils open very wide at night?
- A. To keep dust out.
- B. To look scary.
- C. To let in as much light as possible.
- D. To make light.
9
Question 9
What is the job of the pupil?
- A. the layer at the back that senses light
- B. the coloured ring that makes the pupil bigger or smaller
- C. protects the eye and spreads tears
- D. the hole that lets light into the eye
10
Question 10
Which part of your body actually makes sense of what your eyes detect?
- A. the pupil
- B. the nose
- C. the eyelashes
- D. the brain

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Answer key: How we see

1. D. the coloured ring that makes the pupil bigger or smaller
2. D. They get smaller to let in less light.
3. D. focuses light onto the back of the eye
4. B. No light is reflecting off the book into your eyes.
5. D. carries signals from the eye to the brain
6. B. They get smaller to let in less light.
7. C. the hole that lets light into the eye
8. C. To let in as much light as possible.
9. D. the hole that lets light into the eye
10. D. the brain