history+science
Beginning 10,000 BCE in the Middle East and later elsewhere, the period of the late stone age.
Neolithic Era
a muscle that attaches to bone
skeletal muscle
the largest organ in human body
skin
(n) the altitude (height) of a place above sea level
elevation
An expression like a^n
power
The science or practice of farming, including cultivation of the soil for the growing of crops and the rearing of animals to provide food, wool, and other products
agriculture
a muscle that only exists in the heart
cardiac muscle
the innermost layer of the skin that stores fat
fatty layer
(v) to bargain over the price of something
haggle
The polynomial which has four terms.
quadrinomial
A large prehistoric stone that has been used to construct a structure or monument, either alone or together with others.
megaliths
the outermost layer of the skin
epidermis
the layer under the epidermis
dermis
(n) the general weather conditions of a region throughout the year
climate
In the power like a^n, the variable like a is called the
base
The process of adapting wild plants and animals for human use
domestication
a body system that formed by muscles
muscular system
a Vitamin that can be produced by the epidermis under sunlight
Vitamin D
(n) a large farm that grows crops to sell
plantation
numerical factors in monomials
coefficient
a process in which waste products are released out of body
elimination
a muscle that has a smooth appearance
smooth muscle
a pigment produced by the epidermis to protect the skin from the damage of ultraviolet rays
melanin
In the power like a^n, the variable like n is called the ,（ ） which indicates the number of times the base is used as a factor.
exponent