Science Mania

When two things are rubbed together, surface area that is in contact is

• decreased

• squeezed

• increased

• disappeared

Noise is an unpleasant sound because it has

• high note

• regular wave pattern

• low note

• irregular wave pattern

The three bones in the ear are present in

• Outer ear

• Middle ear

• Inner ear

The hair present in ____________ converts vibrations into electrical signals

• stirrup

• cochlea

• nerves

• ear drum

How static electricity is related to friction?

• Friction is when two things are rubbed against each other, it builds up charges on the insulator

• Friction is when two things are rubbed against each other so they can attract each other

• Friction is when two things are rubbed against each other so conductors can be charged up

Define sound

• Sound is used for communication and expression

• Sound is a form of energy

• Sound is a form of energy which is used for communication and expression

• Sound needs a medium to travel

Sound needs a _________________ to travel and it travels through __________________

• medium, waves

• space, waves

• solid, curves

• gas, straight line

How does flute make sound?

• When air vibrates across the hole

• When finger vibrates across the hole

Pitch is

• degree of softness and loudness of a sound

• degree of highness and lowness of a sound

Which particles from atom can move from one place to another?

• Proton

• Neutron

• Electron