The right material for the job

For grown-ups: this lesson in words

Year 2 · Science

The right material for the job: I can pick the right material for a job.

1. This house is made of different materials.

   The walls are brick. Brick is hard and strong.

   Windows are glass, like this jar. Glass is see-through.

   Picture: House: 1 house, Brick: 1 brick and Glass jar: 1 glass jar.

2. A window must be see-through.

   Wood, metal and rock are not see-through.

   Glass is transparent. It is good for a window!

   Picture: Sorting into 2 groups: Good for a window, Not good for a window. Good for a window: Glass (glass jar). Not good for a window: Wood (piece of wood), Metal (metal can), Rock.

3. Your turn: An umbrella must keep the rain off. Which is best: paper or plastic?

   Picture: Umbrella: 1 umbrella.

   Choose one:

   • Paper: sheet of paper
   • Plastic: plastic bottle

   Answer

   The answer: Plastic

   Plastic. It is waterproof, so the rain runs off.

Words to know

material:

What a thing is made of, like wood, glass or metal.

transparent:

See-through. You can see through it, like glass.

waterproof:

Does not let water through.

squash:

Press something so it gets flatter.

stretch:

Pull something so it gets longer.

twist:

Turn the ends of something round, different ways.