PU3-U5-L4-PG62

Hello. Today we're thinking about what things are made of. Look at these objects on my desk. The ruler is made of plastic. And these pencils are made of wood. Different materials have different properties. Look, I can bend plastic, but not wood. Let's find out about the properties of different materials. Objects in the world are made of different materials. There are toys made of plastic. Rings made of gold. Chairs made of wood. Books made of paper. And cars made of metal. There are houses made of brick. Clothes made of wool. And bottles made of glass. Materials have different properties. Gold is heavy. You don't want to wear it on your head for a long time. Wood is rigid. That means you can't bend it. But you can bend plastic. Plastic is a flexible material. Brick is a rough material. This means that it isn't nice to touch. But metal is smooth. Its surface is nice to touch. Paper is a very light material. So it's easy to hold. Some materials are cheap. Many objects are made of plastic for this reason. But some materials, like gold, are very expensive. That is why gold is used for jewellery. Materials are interesting, aren't they? Wood is my favourite. Okay, I've got a question for you. Which of these two materials is flexible? Is it plastic or wood? That's right, it's plastic. Which of these two materials is rough? Is it brick or metal? That's right, it's brick. Right, I think I should draw something with these pencils. But first, I need to find my notebook. Now, where did I put it? See you next time. Bye!