What is Circadian Rhythm? - Definition & Explanation


Choose an answer and hit 'next'. You will receive your score and answers at the end.

question 1 of 3

The circadian rhythm is a cycle based on a _____ time period.

Create Your Account To Take This Quiz

As a member, you'll also get unlimited access to over 79,000 lessons in math, English, science, history, and more. Plus, get practice tests, quizzes, and personalized coaching to help you succeed.

Try it risk-free
Try it risk-free for 30 days. Cancel anytime
Already registered? Log in here for access

1. The circadian rhythm is controlled by a group of cells in the _____.

2. The hormone that is secreted to help with sleep is called _____.

Create your account to access this entire worksheet
A Premium account gives you access to all lesson, practice exams, quizzes & worksheets
Access to all video lessons
Quizzes, practice exams & worksheets
Certificate of Completion
Access to instructors
Create an account to get started Create Account

About This Quiz & Worksheet

Circadian rhythm, probably better known as your internal clock, regulates patterns of sleeping and waking. This quiz/worksheet combo will help you test your understanding of the characteristics of circadian rhythm. Some things you'll be assessed on include what period of time the circadian rhythm is based on, where circadian rhythm is located, and the hormone that helps with sleep.

Quiz & Worksheet Goals

In these assessments you'll be tested on:

  • Body part responsible for circadian rhythm
  • How artificial light affects sleep
  • Identify what can throw off your circadian rhythm
  • Identify whether or not it is best to keep your room completely dark to get the best sleep possible

Skills Practiced

  • Information recall - access the knowledge you've gained regarding circadian rhythm
  • Knowledge application - use your knowledge to answer questions about the characteristics of circadian rhythm, and how it affects the sleep cycle
  • Interpreting information - verify that you can read information on circadian rhythm and interpret it correctly

Additional Learning

To learn more about the sleep cycle, review the accompanying lesson called What is Circadian Rhythm? - Definition & Explanation. This lesson covers the following topics:

  • Your internal clock
  • Interruptions to circadian rhythm
  • Consequences of continued disruption of the circadian rhythm