Stones, Bones, and Petroglyphs Vocabulary

It is a period of ten years.

• semester

• decade

• century

It is a time before recorded history.

• pueblo

• historic

• prehistoric

It is a hard, dark, glassy rock that forms when lava cools.

• obsidian

• trowel

• alcove

It is a large, hollow space in the walls.

• pueblo

• alcove

• decade

It is a Native American village consisting of houses built of adobe and stone.

• trowels

• alcove

• pueblo

It is a tool having a flat blade with a handle, used for working mortar.

• decade

• trowel

• alcove