Science 6th Annual term 2021

Write your name, father name, class, section and admission number.

When sound travels through the air, the air particles.

• Do not vibrate

• Vibrate in all directions

• Vibrate in the direction of the sound wave.

• Vibrate up and down

The pitch of a sound is how?

• Pleasant it is

• High or low it is

• loud it is

• Far away it is

In air the speed of sound is about.

• 130 meters per second

• 230 meters per second

• 330 meters per second

• 430 meters per second

The part of the piano, which vibrate?

• Skin

• Wires

• Air tube

• Paper cone

Sound is much slower than light, which travels at.

• 300 km/ second

• 330 km / second

• 500,000 km / second

• 300,000 km / second

The hammer, anvil and stirrup are three tiny bones found in the.

• Outer ear

• Middle ear

• Inner ear

• Cochlea

Sound waves can travel through

• From Sun to Earth

• From Mars to Earth

• Space

• Wood

The type of reflection produced by a plane mirror is called a.

• Regular reflection

• Irregular reflection

• Uneven reflection

• Multiple reflection

Light waves are.

• Longitudinal waves

• Electromagnetic waves

• Mechanical waves

• All of these