Week
A week is a unit of time that is made up of seven days. It is a part of the Gregorian calendar, which is the most widely used calendar system today. The days of the week are named after celestial bodies and gods from ancient mythology.
Days of the Week
The days of the week are:
- Monday
- Tuesday
- Wednesday
- Thursday
- Friday
- Saturday
- Sunday
Origin of the Week
The seven-day week has a long history and can be traced back to ancient civilizations such as the Babylonians, Romans, and Egyptians. The concept of a seven-day week is thought to have originated from the cycle of the phases of the moon.
Study Guide
- What is a week?
A week is a unit of time that consists of seven days. - What are the days of the week?
The days of the week are Monday, Tuesday, Wednesday, Thursday, Friday, Saturday, and Sunday. - What is the origin of the seven-day week?
The seven-day week has its origins in ancient civilizations and is thought to be based on the cycle of the phases of the moon.
[Week] Related Worksheets and Study Guides:
.◂Science Worksheets and Study Guides Fourth Grade. Fossils and extinct animals
Study Guide
Fossils and extinct animals 
Worksheet/Answer key
Fossils and extinct animals Worksheet/Answer key
Fossils and extinct animals Worksheet/Answer key
Fossils and extinct animals Vocabulary/Answer key
Fossils and extinct animals Vocabulary/Answer key
Fossils and extinct animals Vocabulary/Answer key
Fossils and extinct animals Vocabulary/Answer key
Fossils and extinct animals
Worksheet/Answer keyWorksheet/Answer keyWorksheet/Answer keyVocabulary/Answer keyVocabulary/Answer keyVocabulary/Answer keyVocabulary/Answer keyThe resources above cover the following skills:
Concepts of Life Science (SC1, SC2, SC3)
The student demonstrates an understanding of how science explains changes in life forms over time, including genetics, heredity, the process of natural selection and biological evolution by describing fossil evidence (e.g., casts, track ways, imprints, etc.) of extinct organisms.