a solid ball of metal. At least, that is what scientists thought. New research published in the journal Nature Geoscience found that the core's shape has shifted during the past 20 years.

Force – Use of strength or high energy that can change a material's shape. Malleable – A material that can be bent and shaped without breaking, like metal. Stretch – A material that can be ...

Discuss any other equipment which could be used to cut metal (and when it might be preferable to use these methods), for example ... a candle stand Cutting a shape to be made into a pendant ...