Spices are from the fruit, seeds, roots, flowers or bark of various plants. They are usually dried. Most are available whole or ground. Like herbs, they often have a strong taste and/or aroma so are usually used in small quantities.
The following sources are useful resources to find information about spices:
The New Zealand Chef
spice retailers’ websites, such as The Spice Trader, have information about the spice they sell.
You may also use other websites recommended by your tutor.