Sounds are form of energy, created by something vibrating (moving very fast in invisible waves). The vibrations set up sound waves in the surrounding.

•Sounds are form of energy, created by something vibrating (moving very fast in invisible waves). The vibrations set up sound waves in the surrounding air.

•Sound waves reach the outer ear and makes the ear drum vibrate, 3 little bones then fluid in the snail-shaped vibrates so we hear .

Wind chime make sound because when the wind pushes them into each other. And one chime bangs into other, both chimes shake a little. This shaking makes the sound you hear.

1. I tap the branches of tuning fork on the tableI hear a………………………….

2. I touch gently with my fingers one of the branches of the tuning forkI feel the branch is …………………..

3. I tap the tuning fork and put the branches gently in a water bowlI saw the water is ……………………

I learnedHow sound travel through……………………. And it helped me to infer how sound travels through………………..

1. I put the clock on the table (No sound – Very low sound) ……………… I hear. 2. I put one end of stick ruler on the clock and the other end up to my ear.I hear a ……………………….. I learned that;The sound travel through the ………………… as well as the ……………….

Fill a balloon with air, and then tie the end.Put the balloon against your ear, and then tap it gently with a pencil.

I hear a…………….…. (Low – loud) sound. 1. Fill another balloon with water, and then close it. Put the balloon on your ear then tap it gently.I hear a …………………. (Low – loud) sound. 2. Fill another third balloon with sand then close it. Put the balloon against your ear, and then tap it gently.I heard a ……………….... (Low – loud) sound.I learned that;1. Sound can only travel through materials. These materials can be ……………..,………….…….. Or ………….…….2. Sounds travel through …..…………. Better than………..……..and travel through………………. Better than……………..

Sounds travel through solids and Sounds travel through solids and liquids as well as air.liquids as well as air.

Question 1

sounds travel through

A Solids, Liquids and AirB LiquidsC AirD Solids

Sounds travel through way?

A Solids, Liquids and AirB LiquidsC AirD Solids

Question 2

Which of these is incorrect?

A Without energy the air particles don’t travel a way form the source.

B When a spoon strike a glass, the glass begins to vibrate.

C When a ruler is struck, it vibrates, but don’t produce sound.

D When the waves bang our eardrums, we hear the sound.

Which of these is incorrect?

A Without energy the air particles don’t travel a way form the source.

B When a spoon strike a glass, the glass begins to vibrate

C When a ruler is struck, it vibrates, but don’t produce sound.

D When the waves bang our eardrums, we hear the sound.

Question 3

Which of these is incorrect?

A Astronauts communicate with each other by talking.

B Sound waves can’t travel in a vacuum.

C Sound travels a bit faster in water than it does in air.

D We can direct the clock tick sound by using a ruler.

Which of these is incorrect?

A Astronauts communicate with each other by talking.

B Sound waves can’t travel in a vacuum.

C Sound travels a bit faster in water than it does in air.

D We can direct the clock tick sound by using a ruler.

Question 4

How are sounds made?

A By objects creatingB By objects relatingC By objects hearingD By objects vibrating

How are sounds made?

A By objects creatingB By objects relatingC By objects hearingD By objects vibrating

Question 5

Which doesn’t fit the way sound travels?

A in wavesB through woodC in straight linesD through water

Which doesn’t fit the way sound travels?

A in wavesB through woodC in straight linesD through water

Question 6

Which of these are correct?

A Sounds travel in the space lower than the water.

B sounds have the same speed whether travel in the water or space.

C Space is vacuum, so sounds can’t travel at all.

D Sounds travel much faster in the space than in water.

Which of these are correct?

A

Sounds travel in the space lower than the water.

B sounds have the same speed whether travel in the water or space.

C Space is vacuum, so sounds can’t travel at all.

D Sounds travel much faster in the space than in water.

Question 7

Which of these are in correct?

A The only real sound transmitted in the water are from sea animals.

B There is a lot of sounds under water Beside that which comes from the animals.

C Fisher men use dynamite to stun fish, which are then easy collected.

D Braking waves at the surface of the sea make noise.

Which of these are in correct?

A The only real sound transmitted in the water are from sea animals.

B There is a lot of sounds under water Beside that which comes from the animals.

C Fisher men who use dynamite to stun fish, which are then easy collected.

D Braking waves at the surface of the sea make noise.

Question 8

Which of these are in correct?

A In string telephone, the sound travels through a string from one place to another.

B No particles means no vibration, no sound waves so no sound.

C When you speak or shout, your vocal chords vibrate.

D you would be able to hear an explosion in the outer space.

Which of these are in correct?

A In string telephone, the sound travels through a string from one place to another.

B No particles means no vibration, no sound waves so no sound.

C When you speak or shout, your vocal chords vibrate.

D you would be able to hear an explosion in the outer space.

Tank you