The most uncertain market now is the foreign exchange market, and Japanese stocks will likely be swayed by it for a while.

While using energy from sunlight, plants turn carbon dioxide into food in a process called photosynthesis.

Tree resin which has been fossilized is known as amber, it sometimes contains plant material or small animals that were trapped inside.

Bronze is a metal alloy made from copper and tin. Copper makes up the larger amount, usually between 80 to 95%.

Copper is a good conductor of electricity and is often used for making wires.