Essential Science for Teachers: Earth and Space Science From the soil and rocks beneath our feet to our connection to the Moon and Sun, the story of Earth is a fascinating one — and most of what is known about the Earth has been gathered through observation and interpretation. Encourage students’ curiosity, help them sharpen their skills of observation and interpretation, foster their development of science knowledge, and share with them the excitement of exploring Earth and the solar system by participating in this course.
or safety and for
defense, people in the Middle Ages formed small communities
around a central lord or master. Most people lived on a manor,
which consisted of the castle, the church, the village, and
the surrounding farm land. These manors were isolated, with
occasional visits from peddlers, pilgrims on their way to the
Crusades, or soldiers from other fiefdoms.
In this "feudal" system,
the king awarded land grants or "fiefs" to his most
important nobles, his barons, and his bishops, in return for
their contribution of soldiers for the king's armies. At the
lowest echelon of society were the peasants, also called "serfs"
or "villeins." In exchange for living and working
on his land, known as the "demesne," the lord offered
his peasants protection.
or safety and for
defense, people in the Middle Ages formed small communities
around a central lord or master. Most people lived on a manor,
which consisted of the castle, the church, the village, and
the surrounding farm land. These manors were isolated, with
occasional visits from peddlers, pilgrims on their way to the
Crusades, or soldiers from other fiefdoms.
In this "feudal" system,
the king awarded land grants or "fiefs" to his most
important nobles, his barons, and his bishops, in return for
their contribution of soldiers for the king's armies. At the
lowest echelon of society were the peasants, also called "serfs"
or "villeins." In exchange for living and working
on his land, known as the "demesne," the lord offered
his peasants protection. 
