Red is a bright colour often seen on fruits and flowers. It is a primary colour, which means red paint can be used to make other colours but you can't use any other colours to make red paint. The flower in the picture is red.
Sepia is a pigment made from cuttlefish ink. It can be used to draw or paint with. Anything that looks like it is made from sepia ink is also called sepia, for example a photograph that has been made into monochrome in browns.
Scientific name: Ag
Silver is a soft, shiny metal that can be polished to be highly reflective. It tarnishes easily, however. Silver is very conductive and today is used electrical components. Silver is widely used for making jewellery, and was used for making tableware like knives and fork. As pure silver is so soft, most practical items made from silver are made from an alloy of silver and another metal like copper.
A spectrum is the range of colors of light that we can see, in order. The order of colors is seen in a rainbow.
A spectrum can also be used to describe a range of related things, such as a "spectrum of religious beliefs".
