the longest bone is our body is

the smallest bone in our body is

how many bones does an adult have?

how many bones does a new born baby have?

skull can protect..

.......... can connect other bones together.

This muscle can bend the knee and move lower leg.

this muscle can bend your arm.

........ is important for building up your body.

Feathers, wings and beak are special body parts for……….

This animal's skeleton is similar to human's skeleton.

Collagen makes our bones ……….

Before doing exercise …………… is important otherwise our muscles will face fatigue.

………… is a special muscle, because we can use it to taste, eat and speak.

The muscles we can not control their movements are called

Scales and fins are special body parts for

Calcium phosphate makes our bones

This aquatic animal has the biggest skeleton

Species with a skeleton are called

species without skeleton are called....

the muscles we can control their movement are called.....

which one of the following is a vertebrate?

......... is the energy things produce when they vibrate.

......... happens when something disturbs the surroundings.

sound travels in .......,

and in ....... directions.

if you are close to the source of the sound, the sound is .......

if you are far away from the source of the sound, the sound is .......

can sound makes things move?

............. is a part of our throat that vibrates when we speak.

........ means harsh and rough.

sound waves can travel through mediums of .....

sound can not travel in a .......

sound waves travel the fastest through ....... and

the slowest through ..........

........ is an empty space without any air or other gas

......... is the loudness of sound.

intensity depends on ........ of the sound waves.

.......... is the softness of the sound.

pitch depends on ............. of the sound.

each ear has ...... parts.

the parts of ear are .............

the reflected sound is .........

if your sound is repeated in an empty room it is called ......

if your sound gets into the materials and it is not repeated, it is .........

if the sound waves are short it has .......

if the sound waves are more they are .....