HOW ARE THINGS MADE?

We know a lot of things about this topic because we have talked about it in Science,so it´s going to be easy peasy.

Did you know that humans can improve existing materials ? Let´s watch some examples.

                                  Another question for you: What Makes Bridges So Strong?

Have you ever seen a boat made of plastic? Here it is.

                               Ok. You don´t remember the history of St. Valentine. Pay attention!

              And we can´t forget a little bit of grammar, of course. This is the passive voice.