22

Draw a labelled diagram to show how long sight can be corrected with suitable lens.

Answer explanation

Label the diagram:

• - Light ray from near object (1)

• - Convex lens (1)

• - Thin lens (1)

Ray diagram***USE RULER*** :

• - Light from near object (1)

Lens for correction of short sight:

• - Convex lens 凸透镜 (1)

If a person suffers from astigmatism, which part of the eye is/are unevenly curved? (Choose more than one answer)

• A

• B

• C

• D

Which part(s) is/are muscle(s) in the eye?

• A & D

• B & E

• C & F

• G & H

What is the function of C?

• regulates the amount of light entering the eye

• controls the size of the pupil

• its thickness changes to help focus light

• protects the eyeball

What is the atomic number of Titanium?

• 20

• 21

• 22

• 23

How many pairs of chromosomes are found in a typical human cell?

• 20

• 21

• 22

• 23

Which element has the atomic number 22?

• Scandium

• Titanium

• Vanadium

• Chromium

In the periodic table, which group does the element with atomic number 22 belong to?

• Group 2

• Group 4

• Group 6

• Group 8

Tags

NGSS.HS-PS1-1

What is the molar mass of Titanium (atomic number 22)?

• 47.87 g/mol

• 50.94 g/mol

• 55.85 g/mol

• 58.93 g/mol

Which of the following is the electron configuration of the element with atomic number 22?

Tags

NGSS.HS-PS1-1