A crop grown in large quantities for sale to other people

Objects made by groups of humans, such as tools and clothes. They help us understand the way of life of the groups who made them.

Money that is owed to someone else.

People who travel to new, unexplored land to learn what these places are like and document characteristics.

To reject a bill. Only the president has this power.

Important parts of Earth's surface, such as mountains, hills, plains, and rivers.

To settle a conflict in which both sides must give up something (doesn't totally get his/her way).