Class 5 GS QUIZ (Book 2 ch.2-3)

Sound is produced by _________ objects.

Sound is reflected when it hits an object. How do we call this phenomenon?

• Sound refractions

• Replies

• Sound rebounds

• Echoes

Which of the following is NOT a property of sound?

• Sound can vary in pitch.

• Sound is reflected when it hits an object.

• Sound travels in straight lines.

• The stronger the vibrations, the louder the sound.

The longer the bar of a xylophone, the __________ the pitch.

• higher

• lower

• louder

• softer

Which of the following activities produces the loudest sound?

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• 
• 
• 

Materials that allow electricity to flow through are __________.

How can we use electricity safely?

• Ask a qualified technician to repair broken electrical appliances.

• Use electrical appliances with wet hands.

• Use electrical appliances that are not waterproof in bathrooms.

• Use electrical appliances with a damaged cable jacket.

Which of the following are insulators?

• 
• 
• 
• 

What should we use to remove an electric shock patient from the electricity source?

• Hand

• Wooden rod

• Iron stick

• Feet

A ______ can control the flow of electricity in a circuit by connecting or disconnecting the circuit.