What is a Year?
In science, a year is the time it takes for a planet to complete one orbit around its star. On Earth, a year is approximately 365.25 days long. This is the time it takes for the Earth to complete one full orbit around the Sun.
Study Guide:
- Definition: Define a year as the time it takes for a planet to complete one orbit around its star.
- Earth's Year: Explain that on Earth, a year is approximately 365.25 days long due to its orbit around the Sun.
- Seasons: Describe how the Earth's orbit and tilt cause the changing of seasons.
- Leap Year: Discuss the concept of a leap year and why it is necessary to account for the extra 0.25 days in Earth's orbit.
- Other Planets: Explore how the length of a year varies on other planets in our solar system.
◂Science Worksheets and Study Guides Third Grade. Grouping of Animals
Study Guide
Grouping of Animals 
Activity Lesson
Grouping of Animals Worksheet/Answer key
Grouping of Animals Worksheet/Answer key
Grouping of Animals Worksheet/Answer key
Grouping of Animals Worksheet/Answer key
Grouping of Animals Vocabulary/Answer key
Grouping of Animals
Activity LessonWorksheet/Answer keyWorksheet/Answer keyWorksheet/Answer keyWorksheet/Answer keyVocabulary/Answer keyThe resources above cover the following skills:
LIFE SCIENCE
From Molecules to Organisms: Structures and Processes
Create representations to explain the unique and diverse life cycles of organisms other than humans (e.g., flowering plants, frogs, butterflies), including commonalities such as birth, growth, reproduction, and death.