Term 1 Mock I Exam Year 9 Science

Term 1 (2020/2021) Mock I Exam Year 9 Science

Sound

• Pitch (high pitch and low pitch)

• Loudness (amplitude)

Multiple Choice

What is vibration?

• how loud a sound is

• the back and forth movement of matter

• how high or low a sound is

• the loudness or softness of a sound

Geocentrism

• proposed by Ptolemy
• this idea is INCORRECT
• this idea lasted for about 1500 years long

Heliocentrism

• proposed by Nicholas Copernicus

• supported and confirmed by Galileo Galilei through observation by telescope

• Sun is at the centre of the Universe

Multiple Choice

Which astronomer believed and proposed that Sun is at the centre of the Universe?

• Darwin

• Ptolemy

• Nicholas Copernicus

• Desmond Tan

Open Ended

When sodium react with water a small explosion happened.

Name the two products.

Open Ended

This question is about reactivity series.

Complete this series.

K

Na

Ca

Mg

__ (A)

Zn

__ (B)

Sn

Pb

Cu

__ (C)

Multiple Choice

A longer string makes a _______ pitch than a short string.

• lower

• higher

• softer

• louder

Chemical formula

• Element

• Atom

Multiple Choice

How many elements can be found in this compound?

• 3

• 4

• 5

• 6

Multiple Choice

How many atoms are there in this compound?

• 5 atoms

• 6 atoms

• 7 atoms

• 8 atoms

Naming Chemical Compound

• Element

• Element + Element --> Compound

Open Ended

Name this chemical compound.

Open Ended

Name this chemical compound.