we heated lead oxide with carbon powder in a crucible.

 molten lead was made at the bottom of the crucible, which when poured onto the heat mat turns solid.

The whole population and every UK visitor should be added to the national DNA database, a senior judge has said.The present database in England and Wales holds details of 4m people who are guilty or cleared of a crime. Lord Justice Sedley said this was indefensible and biased against ethnic minorities, and it would be fairer to include everyone, guilty or innocent.

What are your thoughts on this matter?

Post a comment if you wish

We are starting the year 9 course on the topic of inheritance. We will be looking at the following:

What are our genes and DNA for?

How do you make twins?

What is cloning?

What are varieties and species?

How do breeders get the plants and animals they need?