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. Where plants and animals live
Study Guide
Where plants and animals live 
Worksheet/Answer key
Where plants and animals live Worksheet/Answer key
Where plants and animals live Worksheet/Answer key
Where plants and animals live Vocabulary/Answer key
Where plants and animals live Vocabulary/Answer key
Where plants and animals live
Worksheet/Answer keyWorksheet/Answer keyWorksheet/Answer keyVocabulary/Answer keyVocabulary/Answer keyThe resources above cover the following skills:
LIFE SCIENCE
Unity and Diversity
Construct an argument from evidence to explain the likelihood of an organism’s ability to survive when compared to the resources in a certain habitat (e.g., freshwater organisms survive well, less well, or not at all in saltwater; desert organisms survive well, less well, or not at all in woodlands).
Create models that illustrate how organisms and their habitats make up a system in which the parts depend on each other.