Random useful info

Question 1

Why is aluminium a better metal for use in overhead cables than copper?

Answer 1

As it has a lower density than copper.

Question 2

How is cast iron converted into steel in a furnace?

Answer 2

The carbon in the cast iron reacts with oxygen.

Question 3

Why is cast iron not suitable for use in pylons?

Answer 3

It is too brittle/breaks too easily.

Question 4

If data is collected by only one group of scientists, what reasons could there be for needing more evidence to make conclusions?

Answer 4

1. They could have a vested interest in portraying the data in a certain way.
2. There is a lack of peer review in the work so we cannot ensure the results are accurate from their ideas alone.