Percussion instruments form one family of musical instruments. the word'percussion' means 'striking'. Percussion insruments make sound when you strike them.

A drum is a percussion instrument. It has a thin piece of material, called a drum-head, stretched over a hollow piece of wood or metal. When you strike the drum head, it vibrates. this make the air around the drum vibrate. It also makes the air inside the drum vibrate. The vibrations inside the drum bounce back and forth, somewhat like an echo. These vibrations are the sound that we hear.
cymbals are also percussion instruments. they make a loud,clashing sound when they are hit together.

in the above passage which of the following statements are TRUE.

a. percussion instruments make sound when you strike them.

b. A drum makes a sound when you strike it.

c. The drum-head is a piece of wood or metal.

d. When you strike the drum-head air inside the drum vibrates.

e the vibrations inside the drum are similar to an echo.

f. The vibrations of the air around the drum produces the sound we hear.

g. Cymbals, like drums are also percussion instruments.

h.The sound produced by cymbals is similar to the sound produced by drums.

i. Cymbals produce sound when they are hit together.

j. percussion instruments belong to family of musical instruments.

My answers are a, d, e, f, i, j. whether these are correct or not. please help me.

True:

a
b
d
e
f
g
i
j

what instrument vibrates when you blow into it?

Your answers are mostly correct. Here are the correct statements based on the passage:

a. percussion instruments make sound when you strike them. (True)
b. A drum makes a sound when you strike it. (True)
c. The drum-head is a piece of wood or metal. (False - the drum-head is a thin piece of material stretched over a hollow piece of wood or metal)
d. When you strike the drum-head air inside the drum vibrates. (True)
e. the vibrations inside the drum are similar to an echo. (True)
f. The vibrations of the air around the drum produce the sound we hear. (True)
g. Cymbals, like drums, are also percussion instruments. (True)
h. The sound produced by cymbals is similar to the sound produced by drums. (Not mentioned in the passage)
i. Cymbals produce sound when they are hit together. (True)
j. percussion instruments belong to the family of musical instruments. (True)

So, the correct statements are: a, b, d, e, f, g, i, and j.

Your answers are mostly correct. Here are the correct statements:

a. percussion instruments make sound when you strike them.
This statement is true. Percussion instruments produce sound when they are struck.

d. When you strike the drum-head air inside the drum vibrates.
This statement is true. When the drum-head is struck, it causes the air inside the drum to vibrate.

e. the vibrations inside the drum are similar to an echo.
This statement is true. The vibrations inside the drum bounce back and forth, similar to an echo.

f. The vibrations of the air around the drum produce the sound we hear.
This statement is true. The vibrations of the air around the drum, caused by the drum-head vibrating, are what we hear as sound.

i. Cymbals produce sound when they are hit together.
This statement is true. Cymbals create a loud, clashing sound when they are struck together.

j. Percussion instruments belong to the family of musical instruments.
This statement is true. Percussion instruments are a specific family of musical instruments.

The statements b, c, g, and h are not true:

b. A drum makes a sound when you strike it.
This statement is incorrect because it implies that only drums make sounds when struck, but in reality, all percussion instruments make sound when struck.

c. The drum-head is a piece of wood or metal.
This statement is incorrect because the drum-head is actually a thin piece of material stretched over a hollow piece like wood or metal.

g. Cymbals, like drums, are also percussion instruments.
This statement is incorrect because it implies that cymbals are similar to drums in terms of construction, but they are actually different types of instruments.

h. The sound produced by cymbals is similar to the sound produced by drums.
This statement is incorrect because cymbals produce a clashing sound, while drums produce a more resonant, low-pitched sound.