22

According to the diagram showing how the light rays go through the eyeball of Peter, which of the following combinations is correct?

• A

• B

• C

• D

Tags

NGSS.MS-ETS1-2

Which of the following matchings between different parts of the human eye is INCORRECT?

• A

• B

• C

• D

For people suffering from short sight, which of the following combinations about the image formed and the corrective lens required is correct?

• A

• B

• C

• D

List the steps of the scientific method

d

e

f

c

b

a

Draw conclusions

Communicate results

Analyze results

Conduct experiment

Form a hypothesis

Ask a question

Tags

NGSS.MS-LS1-5

Leo taps 2 tuning forks of different lengths. Which of the following combinations about the pitch and frequency of the sound produced by the long tuning fork is correct?

• A

• B

• C

• D

Tags

NGSS.MS-PS4-1

Which of the following parts of the ear vibrate when we detect sounds?

• X and Y only

• X and Z only

• Y and Z only

• X, Y and Z

Which of the following matchings between sense organs and stimuli is correct?

• A

• B

• C

• D

• E

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

Answer explanation

Label the diagram:

• - Light ray from distant object (1)

• - Concave lens (1)

• - Thick lens (1)

Ray diagram***USE RULER*** :

• - Light from distant object (1)

parallel lines 平行線

Lens for correction of short sight:

• - Concave lens 凹透鏡 (1)

Tags

NGSS.MS-ETS1-2

What is the atomic number of Titanium?

• 20

• 21

• 22

• 23

Which element has 22 protons in its nucleus?

• Calcium

• Scandium

• Titanium

• Vanadium