Leap Years- Years That Contain an Extra Day-Are Necessary Because

question 161

Multiple Choice

Leap years- years that contain an extra day-are necessary because

• A) Earth's speed of revolution along its elliptical orbit varies throughout the year.
• B) 365 days is not exactly divisible by four.
• C) the rotation rate of Earth varies, leading to days of different length during the year.
• D) the length of a year is not an exact number of days.

---

Definitions:

Schizophrenia History

The study and documentation of the origins, development, and variations of schizophrenia over time.

Parkinson Disease

Parkinson disease is a degenerative neurological disorder characterized by motor symptoms such as tremors, stiffness, and slowness of movement due to the loss of dopamine-producing brain cells.

Multiple Sclerosis

A chronic autoimmune disease where the immune system attacks the protective covering of the nerves, leading to impaired brain and spinal cord function.

Major Depression

Mood disorder characterized by prolonged feelings of worthlessness and guilt, disruption of normal eating habits, insomnia, a general slowing of behavior, and frequent thoughts of suicide.