Have a time and place for everything, and do everything in its time and place, and you will not only accomplish more, but have far more leisure than those who are always hurrying.

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

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

Metals are strong and are useful for making tools, buildings, bridges and other structures where strength is important.

At room temperature, mercury is the only metal that is in liquid form.

While aluminum is the most common metal found in the Earth's crust, the most common metal found on Earth is iron, mostly because it makes up such a large part of the Earth's core.