Digging a site takes a great deal of care. Archaeologists must move slowly, to make sure nothing is damaged and nothing is missed. Remember - archaeologists are not looking for fossils, which might have harden or captured in rock. Archaeologists are looking for artifacts, or things that are man-made! Many artifacts are very delicate. For example, they might find a piece of pottery, but not the whole object. So much care must be taken.
The tools they use are varied. Some tools are very specialized. Others look like the archaeologist has been gardening. Some of their tools are wheelbarrows, little trowels, brushes, spoons, dust pans, even dental picks.