F2 IS 2nd Term WS12 Answers

2nd Term WS 12 Submission date：_____________ Name：______________________ Class & no.：2 _________(     )

11.2    How we see II

i      Words to know:

	English term	Write the words again	Chinese term
1	Object		物件
2	Image		像
3	Light receptors		光感受器
4	Signals		訊息
5	Interpret		詮釋
6	Sight		視覺
7	Elastic		有彈性
8	Focus		聚焦
9	Cones		視錐細胞
10	Rods		視桿細胞
11	Night vision		夜視

 

i      Concept checking:

Decide whether the following statements are true or not and try to rewrite the correct statements.

1.       There are no light receptors in the yellow spot.                                                              True / False

There are no light receptors in the blind spot.

2.       For clear vision, the sharp image must be formed on retina.                                           True / False

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3.       We cannot see if the optic nerve is damaged.                                                              True / False

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4.       The cornea helps to focus the light that enters the eye.                                                 True / False

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5.       Under strong light, the pupil becomes smaller, thus avoiding the retina from being hurt.   True / False

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6.       When we are watching a near object, the lenses in our eyes become thinner.                 True / False

When we are watching a near object, the lenses in our eyes become thicker.