adult

Definition

Adult is a term that is used to describe a person who has reached full physical and mental development. In humans, this typically occurs around the age of 18. However, the definition of adulthood can vary depending on the culture or society.

In science, the term adult is often used to refer to a particular stage of development in an organism. For example, the adult stage of a butterfly is called an imago.

There are many different factors that contribute to adulthood. These factors include physical development, mental development, and social development.

Physical development refers to the growth and maturation of the body. This includes the development of the skeleton, muscles, and organs.

Mental development refers to the development of the brain and the mind. This includes the development of intelligence, reasoning, and memory.

Social development refers to the development of the ability to interact with others and to function in society. This includes the development of social skills, such as communication and cooperation.

The definition of adulthood is a complex issue, and there is no single definition that is universally accepted. However, the factors listed above are some of the most important factors that contribute to adulthood.

Here are some of the key things to know about adult:

It is a term that is used to describe a person who has reached full physical and mental development
In humans, this typically occurs around the age of 18
The definition of adulthood can vary depending on the culture or society
There are many different factors that contribute to adulthood

How can the word be used?

The term "adulthood" is used to refer to the period of life after adolescence. This is a time when people are typically characterized by increased independence, responsibility, and self-awareness.

Different forms of the word

Noun:

adult (no plural form).
a person who has reached physical and mental maturity.
adults (plural).
people who have reached physical and mental maturity.

Adjective:

adult.
relating to or characteristic of adults.
used to refer to someone who has reached physical and mental maturity.

Verb:

adult.
to grow up or mature.

Etymology

The word "adult" comes from the Latin word "adultus," which means "grown up." It is a noun that refers to a person who has reached physical and mental maturity. This means that they are fully grown and have developed all of the abilities that they need to function independently.

Question

What does adult mean?

AQA Science Exam Question and Answer

Question:

What are the physical and behavioural changes that occur when an animal reaches adulthood?

Answer:

The physical and behavioural changes that occur when an animal reaches adulthood vary depending on the species of animal. However, there are some general changes that occur in most animals.

Physical changes:

Growth: Animals typically grow rapidly during their early stages of life. However, their growth rate slows down as they reach adulthood.
Sexual maturity: Animals reach sexual maturity at different ages, depending on the species. Once an animal reaches sexual maturity, it is able to reproduce.
Body changes: Animals' bodies undergo a number of changes as they reach adulthood. For example, their bones and muscles become stronger, and their fur or feathers may change colour.

Behavioural changes:

Social behaviour: Animals' social behaviour changes as they reach adulthood. For example, they may start to form social groups or become more aggressive.
Reproductive behaviour: Animals' reproductive behaviour also changes as they reach adulthood. For example, they may start to seek out mates or build nests.
Learning: Animals' ability to learn also changes as they reach adulthood. For example, they may become better at solving problems or learning new skills.

The physical and behavioural changes that occur when an animal reaches adulthood are important for their survival. These changes allow animals to reproduce, take care of their young, and compete for resources.