Science ch 3 A. How can things change the shape?

​Science chapter 3

Pupils book 2 Changes​

A. How can things change the shape?​

​Raj has some tube balloons.

​What is Raj doing to the balloons?

​Bending, stretching, squashing and twisting can change the shape of things.

Subject | Subject

Some text here about the topic of discussion

​How can things change by bending?

​Aishah bends a plastic ruler by pushing on its ends.

Metal pen.​

Shoelace.

​Wooden ruler.

​Which of them are flexible or easy to bend?

This thin​gs are made of bending. What did they look like before they were bent?

Metal clip.

Ribbon bow.

​Paper crane.

​How can things change by squashing?

​What did the orange look before it was squashed?

​What happens to the shape when Tom squashes it?

​Try squashing a ball or a drink can.

​Does the ball or the drink can have the shape as before?

Are you pulling or pushing​ when you squash it?

​How can things change by stretching?

​Lily stretches an exercise band by pulling its ends. Does the exercise band changes its shape? Does it become shorter or longer?

Try stretching this things.

​Rubber band.

​Paper.

Socks.​

Modelling clay.

​Which of these can be stretched?

​Which of these cannot be stretched?

Are you pulling or pushing when you stretch them?

​Do they return to the original shape when you stop stretching them?

​When elastic things are stretched too much, they cannot return to their original shape.

​How can things change by twisting?

​Raj twists a wet towel by turning it. What happens to the shape of the towel?

​We can twist this things too.

Hair.

Dough.

Wires.

​Rope.