Science

Question 1

Longitudinal waves

Answer 1

Are waves which oscillate in a parallel direction the wave travels in.

Question 2

Transverse wave

Answer 2

A wave that oscillates perpendicularly to the direction of the waves advance.

Question 3

Sound waves

Answer 3

Longitudinal mechanical waves that propagate through a medium,like air, water or solids, due to vibrations

Question 4

Structure of the ear

Answer 4

eardrum, cochlea,stirrup,anvil,hammer,ear canal,Pinna,eardrum and auditory nerve.

Question 5

Use of sound waves

Answer 5

everyday communication and music

Question 6

What is Reflection?

Answer 6

When a wave bounces off a boundary and doesnt pass into another medium.

Question 7

what is refraction ?

Answer 7

When a wave changes its direction as it passes from one medium to another.

Question 8

Parts of the eye ?

Answer 8

Iris,pupil,optic nerve,lens and retina

Question 9

What are the Like poles ?

Answer 9

Either 2 north poles or 2 south poles.

Question 10

unlike poles ?

Answer 10

North to south or
South to north

Question 11

Electormagnets

Answer 11

Due to magnetic fields around magnetic currents.Can cause force with other near by magnets e.g motors to spin or loudspeaker to make sound.

Question 12

Biodiversity ?

Answer 12

Variety of life on earth including the diversity of genes , species or eco-systems.

Question 13

Natural selection

Answer 13

Fundamental mechanism to evolution where individuals with traits better suited to their environment are more likely to survive and reproduce