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. Main Parts of Plants
Study Guide
Main Parts of Plants 
Activity Lesson
Main Parts of Plants Worksheet/Answer key
Main Parts of Plants Worksheet/Answer key
Main Parts of Plants Worksheet/Answer key
Main Parts of Plants Worksheet/Answer key
Main Parts of Plants Worksheet/Answer key
This and That Vocabulary/Answer key
Main Parts of Plants Vocabulary/Answer key
Main Parts of Plants
Activity LessonWorksheet/Answer keyWorksheet/Answer keyWorksheet/Answer keyWorksheet/Answer keyWorksheet/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 the structure, function, behavior, development, life cycles, and diversity of living organisms by observing and comparing external features of plants and of animals that may help them grow, survive, and reproduce.