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Which of the following does not allow sound to travel through it?

• Gas

• liquid

• solid

• Vacuum

which of the following characteristics do high-pitched sound waves have?

• long wavelength

• short wavelength

• High amplitude

• Low frequency

which of the following units is used to measure frequency?

• Decibels

• Amps

• Hertz

• Volts

What are sounds caused by?

• Voices

• Air

• Vibrations

• Instruments

which of the following does not work by using sound waves?

• Ultrasound machines

• Sonar

• Telescopes

• Depth finders

Which part of the ear is the point where sound waves enter the ear?

• Pinna

• Eardrum

• Cochlea

• Semi-circular canals

which of the following statements correctly describes light and sound waves?

• light and sound waves are both transverse

• light waves are transverse and sound waves are longitudinal

• light and sound waves are both longitudinal

what are the primary colours of light?

• Red, Blue & Green

• Yellow, Green & Red

• Green, Blue & Yellow

What causes the image of the spoon to look distorted in the picture?

• Compression

• Refraction

• Reflection

• Echoing

which of the following statements is not true about light?

• light is an electromagnetic wave

• light travels in a straight line

• light travels more slowly than sound

• light is produced by luminous objects